Source: https://kupdf.net/download/abb-protection_59d923d908bbc5097c435f93_pdf
Timestamp: 2020-04-08 06:18:36
Document Index: 328228493

Matched Legal Cases: ['art 1', 'arts 2', 'art 1', 'art 2', 'art 3', 'art 4', 'art 1', 'art 0', 'art 1', 'art 1', 'art 2', 'art 3', 'art 5', 'art 5', 'art 6', 'art 1', 'art 2', 'art 3', 'art 4', 'art 4', 'art 4', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 6', 'art 7', 'art 7', 'art 1', 'art 2', 'art 3', 'art 4', 'art 303', 'art 301', 'art 101', 'art 401', 'art 201', 'art 202', 'art 302', 'art 350', 'art 352', 'art 5', 'art 1', 'art 2', 'art 3', 'art 4', 'art 5', 'art 6', 'art 7', 'art 1', 'art 2', 'art 3', 'art 5', 'art 6', 'art 7', 'art 8', 'art 2', 'art 1', 'art 2', 'art 2', 'art 1', 'art 2', 'art 2', 'art 2', 'art 2', 'art 2', 'art 1', 'art 1', 'art 1', 'art 10', 'art 14', 'art 17', 'art 1', 'art 2', 'art 3', 'art 1', 'art 2', 'art 3', 'art 4', 'art 5', 'art 6', 'art 10', 'art 2', 'art 1', 'art 4', 'art 5', 'art 6', 'art 7']

ABB Protection - Free Download PDF
October 8, 2017 | Author: Carlos A. Chacon | Category: Electrical Wiring, Cable, Ac Power Plugs And Sockets, Electromagnetic Compatibility, Insulator (Electricity)
Download ABB Protection...
Electrical installation handbook Volume 1 nd
1SDC008001D0202 Printed in Italy
ABB SACE S.p.A. An ABB Group Company
L.V. Breakers Via Baioni, 35 24123 Bergamo - Italy Tel.: +39 035.395.111 - Telefax: +39 035.395.306-433 http://www.abb.com
2nd edition February 2004
First edition 2003 Second edition 2004
Published by ABB SACE via Baioni, 35 - 24123 Bergamo (Italy) All rights reserved
Introduction .............................................................................................. 2 1 Standards 1.1 General aspects .............................................................................. 3 1.2 IEC Standards for electrical installation .......................................... 15 2 Protection and control devices 2.1 Circuit-breaker nameplates ........................................................... 22 2.2 Main definitions ............................................................................. 25 2.3 Types of releases .......................................................................... 28 3 General characteristics 3.1 Electrical characteristics of circuit breakers ................................... 38 3.2 Trip curves .................................................................................... 49 3.3 Limitation curves ......................................................................... 107 3.4 Specific let-through energy curves .............................................. 134 3.5 Temperature derating .................................................................. 160 3.6 Altitude derating .......................................................................... 175 3.7 Electrical characteristics of switch disconnectors ........................ 176 4 Protection coordination 4.1 Protection coordination ............................................................... 182 4.2 Discrimination tables ................................................................... 189 4.3 Back-up tables ........................................................................... 214 4.4 Coordination tables between circuit breakers and switch disconnectors .................................................................. 218 5 Special applications 5.1 Direct current networks ............................................................... 222 5.2 Networks at particular frequencies; 400 Hz and 16 2/3 Hz .......... 233 5.3 1000 Vdc and 1000 Vac networks .............................................. 250 5.4 Automatic Transfer Switches ....................................................... 262 6 Switchboards 6.1 Electrical switchboards ............................................................... 271 6.2 MNS switchboards ..................................................................... 279 6.3 ArTu distribution switchboards .................................................... 280 Annex A: Protection against short-circuit effects inside low-voltage switchboards .................................................. 283 Annex B: Temperature rise evaluation according to IEC 60890 ....................................................... 292
ABB SACE - Protection and control devices
In each technical field, and in particular in the electrical sector, a condition sufficient (even if not necessary) for the realization of plants according to the “status of the art” and a requirement essential to properly meet the demands of customers and of the community, is the respect of all the relevant laws and technical standards. Therefore, a precise knowledge of the standards is the fundamental premise for a correct approach to the problems of the electrical plants which shall be designed in order to guarantee that “acceptable safety level” which is never absolute.
Juridical Standards These are all the standards from which derive rules of behavior for the juridical persons who are under the sovereignty of that State.
Electrical installation handbook users Technical Standards These standards are the whole of the prescriptions on the basis of which machines, apparatus, materials and the installations should be designed, manufactured and tested so that efficiency and function safety are ensured. The technical standards, published by national and international bodies, are circumstantially drawn up and can have legal force when this is attributed by a legislative measure.
The electrical installation handbook is a tool which is suitable for all those who are interested in electrical plants: useful for installers and maintenance technicians through brief yet important electrotechnical references, and for sales engineers through quick reference selection tables. Validity of the electrical installation handbook Some tables show approximate values due to the generalization of the selection process, for example those regarding the constructional characteristics of electrical machinery. In every case, where possible, correction factors are given for actual conditions which may differ from the assumed ones. The tables are always drawn up conservatively, in favour of safety; for more accurate calculations, the use of DOCWin software is recommended for the dimensioning of electrical installations.
Application fields Electrotechnics and Electronics
International Body European Body
Mechanics, Ergonomics and Safety
This technical collection takes into consideration only the bodies dealing with electrical and electronic technologies.
IEC International Electrotechnical Commission The International Electrotechnical Commission (IEC) was officially founded in 1906, with the aim of securing the international co-operation as regards standardization and certification in electrical and electronic technologies. This association is formed by the International Committees of over 40 countries all over the world. The IEC publishes international standards, technical guides and reports which are the bases or, in any case, a reference of utmost importance for any national and European standardization activity. IEC Standards are generally issued in two languages: English and French. In 1991 the IEC has ratified co-operation agreements with CENELEC (European standardization body), for a common planning of new standardization activities and for parallel voting on standard drafts.
“Low Voltage” Directive 73/23/CEE – 93/68/CEE
The European Committee for Electrotechnical Standardization (CENELEC) was set up in 1973. Presently it comprises 27 countries (Austria, Belgium, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Portugal, Poland, Slovakia, Slovenia, Spain, Sweden, Switzerland, United Kingdom) and cooperates with 8 affiliates (Albania, Bosnia and Herzegovina, Bulgaria, Croatia, Cyprus, Romania, Turkey, Ukraine) which have first maintained the national documents side by side with the CENELEC ones and then replaced them with the Harmonized Documents (HD). CENELEC hopes and expects Cyprus to become the 28th members before May 2004. There is a difference between EN Standards and Harmonization Documents (HD): while the first ones have to be accepted at any level and without additions or modifications in the different countries, the second ones can be amended to meet particular national requirements. EN Standards are generally issued in three languages: English, French and German. From 1991 CENELEC cooperates with the IEC to accelerate the standards preparation process of International Standards. CENELEC deals with specific subjects, for which standardization is urgently required. When the study of a specific subject has already been started by the IEC, the European standardization body (CENELEC) can decide to accept or, whenever necessary, to amend the works already approved by the International standardization body.
The Low Voltage Directive refers to any electrical equipment designed for use at a rated voltage from 50 to 1000 V for alternating current and from 75 to 1500 V for direct current. In particular, it is applicable to any apparatus used for production, conversion, transmission, distribution and use of electrical power, such as machines, transformers, devices, measuring instruments, protection devices and wiring materials. The following categories are outside the scope of this Directive: • electrical equipment for use in an explosive atmosphere; • electrical equipment for radiology and medical purposes; • electrical parts for goods and passenger lifts; • electrical energy meters; • plugs and socket outlets for domestic use; • electric fence controllers; • radio-electrical interference; • specialized electrical equipment, for use on ships, aircraft or railways, which complies with the safety provisions drawn up by international bodies in which the Member States participate.
EC DIRECTIVES FOR ELECTRICAL EQUIPMENT Among its institutional roles, the European Community has the task of promulgating directives which must be adopted by the different member states and then transposed into national law. Once adopted, these directives come into juridical force and become a reference for manufacturers, installers, and dealers who must fulfill the duties prescribed by law. Directives are based on the following principles: • harmonization is limited to essential requirements; • only the products which comply with the essential requirements specified by the directives can be marketed and put into service; • the harmonized standards, whose reference numbers are published in the Official Journal of the European Communities and which are transposed into the national standards, are considered in compliance with the essential requirements; • the applicability of the harmonized standards or of other technical specifications is facultative and manufacturers are free to choose other technical solutions which ensure compliance with the essential requirements; • a manufacturer can choose among the different conformity evaluation procedure provided by the applicable directive. The scope of each directive is to make manufacturers take all the necessary steps and measures so that the product does not affect the safety and health of persons, animals and property. 4
Directive EMC 89/336/EEC (“Electromagnetic Compatibility”) The Directive on electromagnetic compatibility regards all the electrical and electronic apparatus as well as systems and installations containing electrical and/or electronic components. In particular, the apparatus covered by this Directive are divided into the following categories according to their characteristics: • domestic radio and TV receivers; • industrial manufacturing equipment; • mobile radio equipment; • mobile radio and commercial radio telephone equipment; • medical and scientific apparatus; • information technology equipment (ITE); • domestic appliances and household electronic equipment; • aeronautical and marine radio apparatus; • educational electronic equipment; • telecommunications networks and apparatus; • radio and television broadcast transmitters; • lights and fluorescent lamps. The apparatus shall be so constructed that: a) the electromagnetic disturbance it generates does not exceed a level allowing radio and telecommunications equipment and other apparatus to operate as intended; b) the apparatus has an adequate level of intrinsic immunity to electromagnetic disturbance to enable it to operate as intended. An apparatus is declared in conformity to the provisions at points a) and b) when the apparatus complies with the harmonized standards relevant to its product family or, in case there aren’t any, with the general standards.
ABB SACE circuit-breakers (Isomax-Tmax-Emax) are approved by the following shipping registers:
The CE conformity marking shall indicate conformity to all the obligations imposed on the manufacturer, as regards his products, by virtue of the European Community directives providing for the affixing of the CE marking.
When the CE marking is affixed on a product, it represents a declaration of the manufacturer or of his authorized representative that the product in question conforms to all the applicable provisions including the conformity assessment procedures. This prevents the Member States from limiting the marketing and putting into service of products bearing the CE marking, unless this measure is justified by the proved non-conformity of the product.
The manufacturer draw up the technical documentation covering the design, manufacture and operation of the product
The manufacturer guarantees and declares that his products are in conformity to the technical documentation and to the directive requirements
The international and national marks of conformity are reported in the following table, for information only: COUNTRY
Applicability/Organization
Mark of compliance with the harmonized European standards listed in the ENEC Agreement.
Electrical and non-electrical products. It guarantees compliance with SAA (Standard Association of Australia).
S.A.A. Mark
Standards Association of Australia (S.A.A.). The Electricity Authority of New South Wales Sydney Australia
Austrian Test Mark
Naval type approval The environmental conditions which characterize the use of circuit breakers for on-board installations can be different from the service conditions in standard industrial environments; as a matter of fact, marine applications can require installation under particular conditions, such as: - environments characterized by high temperature and humidity, including saltmist atmosphere (damp-heat, salt-mist environment); - on board environments (engine room) where the apparatus operate in the presence of vibrations characterized by considerable amplitude and duration. In order to ensure the proper function in such environments, the shipping registers require that the apparatus has to be tested according to specific type approval tests, the most significant of which are vibration, dynamic inclination, humidity and dry-heat tests. 6
Italian shipping register Norwegian shipping register French shipping register German shipping register British shipping register American shipping register
Marks of conformity to the relevant national and international Standards
ASDC008045F0201
Registro Italiano Navale Det Norske Veritas Bureau Veritas Germanischer Lloyd Lloyd’s Register of Shipping American Bureau of Shipping
It is always advisable to ask ABB SACE as regards the typologies and the performances of the certified circuit-breakers or to consult the section certificates in the website http://bol.it.abb.com.
Flow diagram for the conformity assessment procedures established by the Directive 73/23/EEC on electrical equipment designed for use within particular voltage range:
RINA DNV BV GL LRs ABS
OVE ABB SACE - Protection and control devices
1 Standards COUNTRY
1 Standards Mark designation
ÖVE Identification Thread
Installation materials and electrical appliances
Low voltage materials. This mark guarantees the compliance of the product with the requirements (safety) of the “Heavy Current Regulations”
Conduits and ducts, conductors and flexible cords
Safety Mark of the Elektriska Inspektoratet
Low voltage material. This mark guarantees the compliance of the product with the requirements (safety) of the “Heavy Current Regulations”
Installation material and electrical appliances (in case there are no equivalent national standards or criteria)
Electrical and non-electrical products. This mark guarantees compliance with CSA (Canadian Standard Association)
Conductors and cables – Conduits and ducting – Installation materials
Great Wall Mark Commission for Certification of Electrical Equipment
NF Identification Thread
EZU’ Mark
Portable motor-operated tools
Electrotechnical Research and Design Institute
EVPU’ Mark
For appliances and technical equipment, installation accessories such as plugs, sockets, fuses, wires and cables, as well as other components (capacitors, earthing systems, lamp holders and electronic devices)
For cables, insulated cords, installation conduits and ducts
Mark to be affixed on electrical material for non-skilled users; it certifies compliance with the European Standard(s).
Norwegian Approval Mark
Mandatory safety approval for low voltage material and equipment
General for all equipment
Electrical and non-electrical products. It guarantees compliance with national standard (Gosstandard of Russia)
Electrical and non-electrical products
Electrical products. The mark is under the control of the Asociación Electrotécnica Española(Spanish Electrotechnical Association)
IIRS Mark
R O V ED T
R M I DA D A
R MA S U N
C A DE CON
STA N D AR
Mark which guarantees compliance with the relevant Japanese Industrial Standard(s).
Safety mark for technical equipment to be affixed after the product has been tested and certified by the VDE Test Laboratory in Offenbach; the conformity mark is the mark VDE, which is granted both to be used alone as well as in combination with the mark GS Hungarian Institute for Testing and Certification of Electrical Equipment
VDE-GS Mark for technical equipment
M I . I. R . S .
Asociación Española de Normalización y Certificación. (Spanish Standarization and Certification Association)
SEMKO Mark
Mandatory safety approval for low voltage material and equipment.
Swiss low voltage material subject to mandatory approval (safety).
Cables subject to mandatory approval
B R IT I S
BEAB Safety Mark
Compliance with the “British Standards” for household appliances
Compliance with the “British Standards”
BEAB Kitemark
Compliance with the relevant “British Standards” regarding safety and performances
DENT LA B OR EN
A N D AR ST
R P U B L IC
L I S T E D (Product Name) (Control Number)
Low voltage material subject to mandatory approval
ASTA Mark
Mark which guarantees compliance with the relevant “British Standards”
BASEC Mark
Mark which guarantees compliance with the “British Standards” for conductors, cables and ancillary products.
Mark issued by the European Committee for Standardization (CEN): it guarantees compliance with the European Standards.
BASEC Identification Thread
AD E M AR K
C ER TI FI C AT IO N
SEV Safety Mark
CENELEC Harmonization Mark
Ex EUROPEA Mark
CEEel CEEel Mark
Mark assuring the compliance with the relevant European Standards of the products to be used in environments with explosion hazards
Mark which is applicable to some household appliances (shavers, electric clocks, etc).
IEC 60038 IEC 60664-1
IEC 60076-1 IEC 60076-2
IEC 60726 IEC 60445
Rotating electrical machines - Part 1: Rating and performance Graphical symbols for diagrams - 12month subscription to online database comprising parts 2 to 11 of IEC 60617 Preparation of documents used in electrotechnology - Part 1: General requirements Preparation of documents used in electrotechnology - Part 2: Functionoriented diagrams Preparation of documents used in electrotechnology - Part 3: Connection diagrams, tables and lists Preparation of documents used in electrotechnology - Part 4: Location and installation documents IEC standard voltages Insulation coordination for equipment within low-voltage systems - Part 1: Principles, requirements and tests Short-circuit currents in three-phase a.c. systems - Part 0: Calculation of currents Short-circuit currents - Calculation of effects - Part 1: Definitions and calculation methods Application guide for calculation of shortcircuit currents in low-voltage radial systems Power transformers - Part 1: General Power transformers - Part 2: Temperature rise Power transformers - Part 3: Insulation levels, dielectric tests and external clearances in air Power transformers - Part 5: Ability to withstand short circuit Terminal and tapping markings for power transformers Dry-type power transformers Basic and safety principles for manmachine interface, marking and identification - Identification of equipment terminals and of terminations of certain designated conductors, including general rules for an alphanumeric system
Certification mark providing assurance that the harmonized cable complies with the relevant harmonized CENELEC Standards – identification thread
EC - Declaration of Conformity The EC Declaration of Conformity is the statement of the manufacturer, who declares under his own responsibility that all the equipment, procedures or services refer and comply with specific standards (directives) or other normative documents. The EC Declaration of Conformity should contain the following information: • name and address of the manufacturer or by its European representative; • description of the product; • reference to the harmonized standards and directives involved; • any reference to the technical specifications of conformity; • the two last digits of the year of affixing of the CE marking; • identification of the signer. A copy of the EC Declaration of Conformity shall be kept by the manufacturer or by his representative together with the technical documentation.
Low-voltage switchgear and controlgear Part 5-6: Control circuit devices and switching elements – DC interface for proximity sensors and switching amplifiers (NAMUR) Low-voltage switchgear and controlgear Part 6-1: Multiple function equipment – Automatic transfer switching equipment
Basic and safety principles for manmachine interface, marking and identification – Coding for indication devices and actuators Basic and safety principles for manmachine interface, marking and identification - Identification of conductors by colours or numerals Man-machine-interface (MMI) - Actuating principles Low-voltage switchgear and controlgear Part 1: General rules Low-voltage switchgear and controlgear Part 2: Circuit-breakers Low-voltage switchgear and controlgear Part 3: Switches, disconnectors, switchdisconnectors and fuse-combination units Low-voltage switchgear and controlgear Part 4-1: Contactors and motor-starters – Electromechanical contactors and motorstarters Low-voltage switchgear and controlgear Part 4-2: Contactors and motor-starters – AC semiconductor motor controllers and starters Low-voltage switchgear and controlgear Part 4-3: Contactors and motor-starters – AC semiconductor controllers and contactors for non-motor loads Low-voltage switchgear and controlgear Part 5-1: Control circuit devices and switching elements - Electromechanical control circuit devices Low-voltage switchgear and controlgear Part 5-2: Control circuit devices and switching elements – Proximity switches Low-voltage switchgear and controlgear Part 5-3: Control circuit devices and switching elements – Requirements for proximity devices with defined behaviour under fault conditions Low-voltage switchgear and controlgear Part 5: Control circuit devices and switching elements – Section 4: Method of assessing the performance of low energy contacts. Special tests Low-voltage switchgear and controlgear Part 5-5: Control circuit devices and switching elements - Electrical emergency stop device with mechanical latching function
Low-voltage switchgear and controlgear assemblies - Part 5: Particular requirements for assemblies intended to be installed outdoors in public places Cable distribution cabinets (CDCs) for power distribution in networks
Low-voltage switchgear and controlgear Part 6-2: Multiple function equipment Control and protective switching devices (or equipment) (CPS) Low-voltage switchgear and controlgear Part 7: Ancillary equipment - Section 1: Terminal blocks Low-voltage switchgear and controlgear Part 7: Ancillary equipment - Section 2: Protective conductor terminal blocks for copper conductors Low-voltage switchgear and controlgear assemblies - Part 1: Type-tested and partially type-tested assemblies Low-voltage switchgear and controlgear assemblies - Part 2: Particular requirements for busbar trunking systems (busways) Low-voltage switchgear and controlgear assemblies - Part 3: Particular requirements for low-voltage switchgear and controlgear assemblies intended to be installed in places where unskilled persons have access for their use Distribution boards Low-voltage switchgear and controlgear assemblies - Part 4: Particular requirements for assemblies for construction sites (ACS)
IEC 61117
A method of temperature-rise assessment by extrapolation for partially type-tested assemblies (PTTA) of low-voltage switchgear and controlgear A method for assessing the short-circuit withstand strength of partially type-tested assemblies (PTTA) Electrical installations in ships. Part 303: Equipment - Transformers for power and lighting Electrical installations in ships. Part 301: Equipment - Generators and motors Electrical installations in ships - Part 101: Definitions and general requirements Electrical installations in ships. Part 401: Installation and test of completed installation Electrical installations in ships - Part 201: System design - General Electrical installations in ships - Part 202: System design - Protection Electrical installations in ships - Part 302: Low-voltage switchgear and controlgear assemblies Electrical installations in ships - Part 350: Shipboard power cables - General construction and test requirements Electrical installations in ships - Part 352: Choice and installation of cables for lowvoltage power systems Electrical installations of buildings - Part 5-52: Selection and erection of electrical equipment – Wiring systems Polyvinyl chloride insulated cables of rated voltages up to and including 450/ 750 V Part 1: General requirements Part 2: Test methods Part 3: Non-sheathed cables for fixed wiring Part 4: Sheathed cables for fixed wiring Part 5: Flexible cables (cords) Part 6: Lift cables and cables for flexible connections Part 7: Flexible cables screened and unscreened with two or more conductors Conductors of insulated cables Rubber insulated cables - Rated voltages up to and including 450/750 V Part 1: General requirements Part 2: Test methods Part 3: Heat resistant silicone insulated cables
1998 1997 1997 1997 1998 2001 1995 IEC 60228 IEC 60245
Part 5: Lift cables Part 6: Arc welding electrode cables Part 7: Heat resistant ethylene-vinyl acetate rubber insulated cables Part 8: Cords for applications requiring high flexibility Plugs, socket-outlets and couplers for industrial purposes - Part 2: Dimensional interchangeability requirements for pin and contact-tube accessories Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCBs) Part 1: General rules Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCB’s). Part 2-1: Applicability of the general rules to RCCB’s functionally independent of line voltage Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCB’s). Part 2-2: Applicability of the general rules to RCCB’s functionally dependent on line voltage Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs) Part 1: General rules Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBO’s) Part 2-1: Applicability of the general rules to RCBO’s functionally independent of line voltage Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBO’s) Part 2-2: Applicability of the general rules to RCBO’s functionally dependent on line voltage General requirements for enclosures for accessories for household and similar fixed electrical installations Switches for household and similar fixed electrical installations - Part 2-1: Particular requirements – Electronic switches Switches for household and similar fixed electrical installations - Part 2: Particular requirements – Section 2: Remote-control switches (RCS) Switches for household and similar fixed electrical installations - Part 2-3: Particular requirements – Time-delay switches (TDS)
1998 IEC 60309-2
IEC 606692-3
IEC 61000-1-3
Protection of persons and equipment by enclosures - Probes for verification Electromagnetic compatibility (EMC) Part 1: General - Section 1: Application and interpretation of fundamental definitions and terms Electromagnetic compatibility (EMC) Part 1-2: General - Methodology for the achievement of the functional safety of electrical and electronic equipment with regard to electromagnetic phenomena Electromagnetic compatibility (EMC) Part 1-3: General - The effects of highaltitude EMP (HEMP) on civil equipment and systems
Electrical apparatus for explosive gas atmospheres - Part 10: Classification of hazardous areas Electrical apparatus for explosive gas atmospheres - Part 14: Electrical installations in hazardous areas (other than mines) Electrical apparatus for explosive gas atmospheres - Part 17: Inspection and maintenance of electrical installations in hazardous areas (other than mines) Low-voltage fuses - Part 1: General requirements Low-voltage fuses. Part 2: Supplementary requirements for fuses for use by authorized persons (fuses mainly for industrial application) Low-voltage fuses - Part 3-1: Supplementary requirements for fuses for use by unskilled persons (fuses mainly for household and similar applications) Sections I to IV Miniature fuses Part 1: Definitions for miniature fuses and general requirements for miniature fuse-links Part 2: Cartridge fuse-links Part 3: Sub-miniature fuse-links Part 4: Universal Modular Fuse-Links (UMF) Part 5: Guidelines for quality assessment of miniature fuse-links Part 6: Fuse-holders for miniature cartridge fuse-links Part 10: User guide for miniature fuses Automatic electrical controls for household and similar use. Part 2: Particular requirements for timers and time switches Electrical installations of buildings - Part 1: Fundamental principles, assessment of general characteristics, definitions Electrical installations of buildings - Part 4: Protection for safety Electrical installations of buildings - Part 5: Selection and erection of electrical equipment Electrical installations of buildings - Part 6: Verification Electrical installations of buildings. Part 7: Requirements for special installations or locations Degrees of protection provided by enclosures (IP Code)
IEC 60127-1/10 1999 1989 1988 1996 1988 1994
IEC 60364-5
IEC 60364-7
1983…2002
2.1 Circuit-breaker nameplates
2.1 Circuit-breaker nameplates Moulded-case circuit-breaker: Isomax
Moulded-case circuit-breaker: Tmax CIRCUIT-BREAKER TYPE Rated ultimate short-circuit breaking capacity at 415 Vac B = 16 kA C = 25 kA N = 36 kA S = 50 kA H = 70 kA L = 85 kA (for T2) L = 120 kA (for T4-T5) V = 200 kA
Rated uninterrupted current 160 A 250 A 320 A 400 A 630 A
Rated uninterrupted current Iu Rated operational voltage Ue
Tmax T2L160 Ue (V) Icu (kA) Ics (% Icu) Cat A
Rated ultimate shortcircuit breaking capacity (Icu) and rated service short-circuit breaking capacity (Ics) at different voltage values.
According to the international Standard IEC 60947-2, the circuit breakers can be divided into Category A, i.e. without a specified short-time withstand current rating, or Category B, i.e. with a specified short-time withstand current rating.
CE marking affixed on ABB circuit-breakers to indicate compliance with the following CE directives: “Low Voltage Directive” (LVD) no. 73/23 EEC “Electromagnetic Compatibility Directive” (EMC) no. 89/336 EEC.
CIRCUIT-BREAKER TYPE Series S
Rated insulation voltage Ui; i.e. the maximum r.m.s. value of voltage which the circuit-breaker is capable of withstanding at the supply frequency under specified test conditions.
N = 35 kA S = 50 kA H = 65 kA (for S6-S7) H = 85 kA (for S8) L = 100 kA V = 120 kA
Rated uninterrupted current Iu Rated operational voltage Ue Compliance with national and international product Standards.
Rated impulse withstand voltage Uimp; i.e. the peak value of impulse voltage which the circuit-breaker can withstand under specified test conditions.
Compliance with the international Standard IEC 60947-2: “Low-Voltage switchgear and controlgear-Circuitbreakers”.
Rated ultimate short-circuit breaking capacity at 415 Vac
SACE S6L Ue
Iu=800A Ue=690V IEC 947-2 CEI EN 60947-2
Icu 50-60 Hz (kA)
According to the international Standard IEC 60947-2: “Low-Voltage switchgear and controlgearCircuit-breakers”.
Rated ultimate shortcircuit breaking capacity (Icu) at different voltage values.
According to the international Standard IEC 60947-2, the circuit-breakers can be divided into Category A, i.e. without a specified short-time withstand current rating, or Category B, i.e. with a specified short-time withstand current rating.
(50% Icu 690V)
ASDC008047F0201
ASDC008046F0201
2 Protection and control devices 2.2 Main definitions The main definitions regarding LV switchgear and controlgear are included in the international Standards IEC 60947-1, IEC 60947-2 and IEC 60947-3.
Air circuit-breaker: Emax
CIRCUIT-BREAKER TYPE Series E
Rated ultimate short-circuit breaking capacity at 415 Vac B = 42 kA N = 65 kA (50 kA E1) S = 75 kA H = 100 kA L = 130 kA V = 150 kA
Rated uninterrupted current 800 A 08 1250 A 12 1600 A 16 2000 A 20 2500 A 25 3200 A 32 4000 A 40 5000 A 50 6300 A 63
Circuit-breaker A mechanical switching device, capable of making, carrying and breaking currents under normal circuit conditions and also making, carrying for a specified time and breaking currents under specified abnormal circuit conditions such as those of short-circuit. Current-limiting circuit-breaker A circuit-breaker with a break-time short enough to prevent the short-circuit current reaching its otherwise attainable peak value. Plug-in circuit-breaker A circuit-breaker which, in addition to its interrupting contacts, has a set of contacts which enable the circuit-breaker to be removed. Withdrawable circuit-breaker A circuit-breaker which, in addition to its interrupting contacts, has a set of isolating contacts which enable the circuit-breaker to be disconnected from the main circuit, in the withdrawn position, to achieve an isolating distance in accordance with specified requirements. Moulded-case circuit-breaker A circuit-breaker having a supporting housing of moulded insulating material forming an integral part of the circuit-breaker. Disconnector A mechanical switching device which, in the open position, complies with the requirements specified for the isolating function. Release A device, mechanically connected to a mechanical switching device, which releases the holding means and permits the opening or the closing of the switching device.
Iu=3200A Ue=690V Icw=65kA x 1 Cat B 50-60 Hz CEI EN 60947 (V) 230 415 440 500 690 250 IEC 947-2 Ue (kA) 65 65 65 65 65 65 Icu Ics (kA) 65 65 65 65 65 65
SACE E3N 32
Rated short-time withstand current Icw; i.e. the maximum current that the circuit-breaker can carry during a specified time.
According to the international Standard IEC 60947-2, the circuitbreakers can be divided into Category A, i.e. without a specified shorttime withstand current rating, or Category B, i.e. with a specified short-time withstand current rating.
Rated ultimate short-circuit breaking capacity (Icu) and rated service shortcircuit breaking capacity (Ics) at different voltage values.
ASDC008048F0201
Fault types and currents Overload Operating conditions in an electrically undamaged circuit which cause an overcurrent. Short-circuit The accidental or intentional connection, by a relatively low resistance or impedance, of two or more points in a circuit which are normally at different voltages. Residual current (I∆) It is the vectorial sum of the currents flowing in the main circuit of the circuitbreaker.
2.2 Main definitions
Rated performances Voltages and frequencies Rated operational voltage (Ue) A rated operational voltage of an equipment is a value of voltage which, combined with a rated operational current, determines the application of the equipment and to which the relevant tests and the utilization categories are referred to. Rated insulation voltage (Ui) The rated insulation voltage of an equipment is the value of voltage to which dielectric tests voltage and creepage distances are referred. In no case the maximum value of the rated operational voltage shall exceed that of the rated insulation voltage. Rated impulse withstand voltage (Uimp) The peak value of an impulse voltage of prescribed form and polarity which the equipment is capable of withstanding without failure under specified conditions of test and to which the values of the clearances are referred. Rated frequency The supply frequency for which an equipment is designed and to which the other characteristic values correspond. Currents Rated uninterrupted current (Iu) The rated uninterrupted current of an equipment is a value of current, stated by the manufacturer, which the equipment can carry in uninterrupted duty. Rated residual operating current (I∆n) It is the r.m.s. value of a sinusoidal residual operating current assigned to the CBR by the manufacturer, at which the CBR shall operate under specified conditions.
Performances under short-circuit conditions Rated making capacity The rated making capacity of an equipment is a value of current, stated by the manufacturer, which the equipment can satisfactorily make under specified making conditions. Rated breaking capacity The rated breaking of an equipment is a value of current, stated by the manufacturer, which the equipment can satisfactorily break, under specified breaking conditions.
Rated ultimate short-circuit breaking capacity (Icu) The rated ultimate short-circuit breaking capacity of a circuit-breaker is the maximum short-circuit current value which the circuit-breaker can break twice (in accordance with the sequence O – t – CO), at the corresponding rated operational voltage. After the opening and closing sequence the circuit-breaker is not required to carry its rated current. Rated service short-circuit breaking capacity (Ics) The rated service short-circuit breaking capacity of a circuit-breaker is the maximum short-circuit current value which the circuit-breaker can break three times in accordance with a sequence of opening and closing operations (O - t - CO - t – CO) at a defined rated operational voltage (Ue) and at a defined power factor. After this sequence the circuit-breaker is required to carry its rated current. Rated short-time withstand current (Icw) The rated short-time withstand current is the current that the circuit-breaker in the closed position can carry during a specified short time under prescribed conditions of use and behaviour; the circuit-breaker shall be able to carry this current during the associated short-time delay in order to ensure discrimination between the circuit-breakers in series. Rated short-circuit making capacity (Icm) The rated short-circuit making capacity of an equipment is the value of shortcircuit making capacity assigned to that equipment by the manufacturer for the rated operational voltage, at rated frequency, and at a specified power-factor for ac.
Utilization categories The utilization category of a circuit-breaker shall be stated with reference to whether or not it is specifically intended for selectivity by means of an intentional time delay with respect to other circuit-breakers in series on the load side, under short-circuit conditions (Table 4 IEC 60947-2). Category A - Circuit-breakers not specifically intended for selectivity under short-circuit conditions with respect to other short-circuit protective devices in series on the load side, i.e. without a short-time withstand current rating. Category B - Circuit-breakers specifically intended for selectivity under shortcircuit conditions with respect to other short-circuit protective devices in series on the load side, i.e. with and intentional short-time delay provided for selectivity under short-circuit conditions. Such circuit-breakers have a short-time withstand current rating.
2.3 Types of releases
A circuit-breaker is classified in category B if its Icw is higher than (Table 3 IEC 60947-2):
with particular requirements, thanks to their wide setting possibilities of both thresholds and tripping times. Among the devices sensitive to overcurrents, the following can be considered:
12·In or 5 kA, whichever is the greater 30 kA
for In ≤ 2500A for In > 2500A
• thermomagnetic releases and magnetic only releases; • microprocessor-based releases; • residual current devices.
Electrical and mechanical durability Mechanical durability The mechanical durability of an apparatus is expressed by the number of noload operating cycles (each operating cycle consists of one closing and opening operation) which can be effected before it becomes necessary to service or replace any of its mechanical parts (however, normal maintenance may be permitted). Electrical durability The electrical durability of an apparatus is expressed by the number of on-load operating cycles and gives the contact resistance to electrical wear under the service conditions stated in the relevant product Standard.
The choice and adjusting of protection releases are based both on the requirements of the part of plant to be protected, as well as on the coordination with other devices; in general, discriminating factors for the selection are the required threshold, time and curve characteristic.
2.3.1 THERMOMAGNETIC RELEASES AND MAGNETIC ONLY RELEASES
The thermomagnetic releases use a bimetal and an electromagnet to detect overloads and short-circuits; they are suitable to protect both alternating and direct current networks.
A circuit-breaker must control and protect, in case of faults or malfunctioning, the connected elements of a plant. In order to perform this function, after detection of an anomalous condition, the release intervenes in a definite time by opening the interrupting part. The protection releases fitted with ABB SACE moulded-case and air circuitbreakers can control and protect any plant, from the simplest ones to those
→ 1 1.6 2 2.5 Circuit-breaker In [A] Magnetic type Thermal [A]→MO 1.1-1.6 1.4-2 1.8-2.5 T1 10xIn T2 10xIn (MO*)13xIn
2.2-3.2 2.8-4 3.5-5 4.4-6.3 32 42
(MO*)6-12xIn T3 10xIn
MO 8.8-12.5 11-16 500 125 163
The following table shows the available rated currents and the relevant magnetic settings.
14-20 18-25 22-32 28-40 500 500 500 500 500
35-50 500
44-63 630
56-80 800
70-100 1000
88-125 1250
112-160 1600
480-960 800
600-1200 1000
400 600-1200
400 750-1500
480 960-1920
600 1200-2400
960-2240
3xIn (MO*)6-12xIn T4 10xIn 5-10xIn
(MO*)6-14xIn T5 5-10xIn
320 60-140
320 150-350
500 314-728
2.5-5xIn S6 5-10xIn
1600-3200 1600-3200
1600-3200 4000-8000
*Note: MO Magnetic only
For example, a circuit-breaker type T2, with rated current In equal to 2.5 A, is available in two versions: - thermomagnetic with adjustable thermal current I1 from 1.8 up to 2.5 A and fixed magnetic current I3 equal to 25 A; - magnetic only (MO) with fixed magnetic current I3 equal to 33 A.
Besides the standard protection functions, releases provide: - measurements of the main characteristics of the plant: voltage, frequency, power, energy and harmonics (PR112-PR113); - serial communication with remote control for a complete management of the plant (PR212-PR222-PR112-PR113, equipped with dialogue unit).
CURRENT TRANSFORMER SIZE Rated current In [A] → Circuit-breaker Iu[A]
2.3.2 ELECTRONIC RELEASES
These releases are connected with current transformers (three or four according to the number of conductors to be protected), which are positioned inside the circuit-breaker and have the double functions of supplying the power necessary to the proper functioning of the release (self-supply) and of detecting the value of the current flowing inside the live conductors; therefore they are compatible with alternating current networks only. The signal coming from the transformers and from the Rogowsky coils is processed by the electronic component (microprocessor) which compares it with the set thresholds. When the signal exceeds the thresholds, the trip of the circuit-breaker is operated through an opening solenoid which directly acts on the circuit-breaker operating mechanism. In case of auxiliary power supply in addition to self-supply from the current transformers, the voltage shall be 24 Vdc ± 20%.
Rated Current In [A] →
PR222 PR211/PR212
252-630 320-800
PR222/MP PR212/MP
252-630 10-100
100-1000 60-1000
160-1600 96-1600
250-2500 150-2500
320-3200 192-3200
400-4000 240-4000
630-6300 378-6300
240-1920
480-3200*
960-2080
1920-4160
PR221(1) PR222
PR211/PR212 PR221(1) I Function
3780-8190
2875-15000
2400-19200
3750-30000
For T2 only: S function is in alternative to I function * For T5 480-3840
CURRENT TRANSFORMER SIZE Rated Current In [A] → Circuit- breaker Iu[A] E1B
2.3.2.1 PROTECTION FUNCTIONS OF ELECTRONIC RELEASES 2000
The protection functions available for the electronic releases are: L - Overload protection with inverse long time delay Function of protection against overloads with inverse long time delay and constant specific let-through energy; it cannot be excluded. L - Overload protection in compliance with Std. IEC 60255-3 Function of protection against overloads with inverse long time delay and trip curves complying with IEC 60255-3; applicable in the coordination with fuses and with medium voltage protections. S - Short-circuit protection with adjustable delay Function of protection against short-circuit currents with adjustable delay; thanks to the adjustable delay, this protection is particularly useful when it is necessary to obtain selective coordination between different devices. D - Directional short-circuit protection with adjustable delay The directional protection, which is similar to function S, can intervene in a different way according to the direction of the short-circuit current; particularly suitable in meshed networks or with multiple supply lines in parallel. I - Short-circuit protection with instantaneous trip Function for the instantaneous protection against short-circuit. G - Earth fault protection with adjustable delay Function protecting the plant against earth faults. U - Phase unbalance protection Protection function which intervenes when an excessive unbalance between the currents of the single phases protected by the circuit-breaker is detected. OT - Self-protection against overtemperature Protection function controlling the opening of the circuit-breaker when the temperature inside the release can jeopardize its functioning. UV - Undervoltage protection Protection function which intervenes when the phase voltage drops below the preset threshold.
2000 1600 2000 E2L
2000 2500 3200 E3L
6300 6300 4000 5000 6300
PR111 Function PR112/PR113
320÷800
500÷1250
640÷1600
800÷2000
1280÷3200
1600÷4000
2520÷6300
S PR111 Function PR112/PR113
250÷2500 150÷2500
400÷4000 240÷4000
800÷8000 480÷8000
1000÷10000 600÷10000
1250÷12500 750÷12500
1600÷16000 960÷16000
2000÷20000 1200÷20000
2500÷25000 1500÷25000
3200÷32000 1920÷32000
4000÷40000 2400÷40000
5000÷50000 3000÷50000
6300÷63000 3780÷63000
I PR111 Function PR112/PR113
375÷3000 375÷3750
600÷4800 600÷6000
1200÷9600 1200÷12000
1500÷12000 1500÷15000
1875÷15000 1875÷18750
2400÷19200 2400÷24000
3000÷24000 3000÷30000
3750÷30000 3750÷37500
4800÷38400 4800÷48000
6000÷48000 6000÷60000
7500÷60000 7500÷75000
9450÷75600 9450÷94500
OV - Overvoltage protection Protection function which intervenes when the phase voltage exceeds the preset threshold. RV - Residual voltage protection Protection which identifies anomalous voltages on the neutral conductor. RP - Reverse power protection Protection which intervenes when the direction of the active power is opposite to normal operation. R - Protection against rotor blockage Function intervening as soon as conditions are detected, which could lead to the block of the rotor of the protected motor during operation. Iinst - Very fast instantaneous protection against short-circuit This particular protection function has the aim of maintaining the integrity of the circuit-breaker and of the plant in case of high currents requiring delays lower than those guaranteed by the protection against instantaneous shortcircuit. This protection must be set exclusively by ABB SACE and cannot be excluded.
When the release detects a residual current different from zero, it opens the circuit-breaker through an opening solenoid. As we can see in the picture the protection conductor or the equipotential conductor have to be installed outside the eventual external toroid.
Generic distribution system (IT, TT, TN)
L1 L2 L3 N PE Circuit-breaker
The following table summarizes the types of electronic release and the functions they implement: SIZE T2 T4-T5
S6-S7 S6-S7-S8
S6-S7 E1-E2-E3-E4-E6
RELEASE PR221DS LS PR221DS I PR221DS LS/I PR222DS/P LSI PR222DS/P LSIG PR222MP LRIU PR211/P LI PR211/P I PR212/P LSI PR212/P LSIG PR212/MP LRIU PR111/P LI PR111/P LSI PR111/P LSIG PR112/P LSI PR112/P LSIG PR113/P LSIG
PROTECTION FUNCTION L-S or L-I I L-S-I L-S-I L-S-I-G L-R-I-U L-I I L-S-I L-S-I-G L-R-I-U L-I L-S-I L-S-I-G L-S-I-OT L-S-I-G-OT L-S-I-G-D-UV-OV-RV-U-RP-OT
The settings and curves of the single protection functions are reported in the chapter 3.2.2 2.3.3 RESIDUAL CURRENT DEVICES
Opening solenoid Protective conductor
ASDC008002F0201
The operating principle of the residual current release makes it suitable for the distribution systems TT, IT (even if paying particular attention to the latter) and TN-S, but not in the systems TN-C. In fact, in these systems, the neutral is used also as protective conductor and therefore the detection of the residual current would not be possible if the neutral passes through the toroid, since the vectorial sum of the currents would always be equal to zero.
The residual current releases are associated with the circuit-breaker in order to obtain two main functions in a single device: - protection against overloads and short-circuits; - protection against indirect contacts (presence of voltage on exposed conductive parts due to loss of insulation). Besides, they can guarantee an additional protection against the risk of fire deriving from the evolution of small fault or leakage currents which are not detected by the standard protections against overload. Residual current devices having a rated residual current not exceeding 30 mA are also used as a means for additional protection against direct contact in case of failure of the relevant protective means. Their logic is based on the detection of the vectorial sum of the line currents through an internal or external toroid. This sum is zero under service conditions or equal to the earth fault current (I∆) in case of earth fault. 34
One of the main characteristics of a residual current release is its minimum rated residual current I∆n. This represents the sensitivity of the release. According to their sensitivity to the fault current, the residual current circuitbreakers are classified as: - type AC: a residual current device for which tripping is ensured in case of residual sinusoidal alternating current, in the absence of a dc component whether suddenly applied or slowly rising; - type A: a residual current device for which tripping is ensured for residual sinusoidal alternating currents in the presence of specified residual pulsating direct currents, whether suddenly applied or slowly rising. - type B residual current device for which tripping is ensured for residual sinusoidal alternating currents in presence of specified residual pulsanting direct currents whether suddenly applied or slowy rising, for residual directs may result from rectifying circuits.
In these case it is necessary to use a residual current release classified as type B. The following table shows the main characteristics of ABB SACE residual current devices; they can be mounted both on circuit-breakers as well as on switch disconnectors (in case of fault currents to earth lower than the apparatus breaking capacity), are type A devices and they do not need auxiliary supply since they are self-supplied.
RC221 T1-T2-T3 T1-T2-T3 T1D-T3D T1D-T3D Primary service voltage [V] 85-500 85-500 Rated service current [A] 250 250 Rated residual current trip I∆n [A] 0.03-0.1-0.30.03-0.05-0.10.5-1-3 0.3-0.5-1 3-5-10 Time limit for non-trip (at 2x I∆n) [s] Instantaneous Inst.-0.1-0.20.3-0.5-1-2-3 Tolerance over trip times [%] ± 20
Suitable for circuit-breaker type
Note: for detailed information, please consult the relevant technical catalogues.
Correct functioning of residual current devices
Along with the family of residual current releases illustrated previously, ABB SACE is developing the RC223 (B type) residual current release, which can only be combined with the Tmax T4 four-pole circuit-breaker in the fixed or plug-in version. It is characterized by the same types of reference as the RC222 (S and AE type) release, but can also boast conformity with type B operation, which guarantees sensitivity to residual fault currents with alternating, alternating pulsating and direct current components. Apart from the signals and settings typical of the RC222 residual current release, the RC223 also allows selection of the maximum threshold of sensitivity to the residual fault frequency (3 steps: 400 – 700 –1000 Hz). It is therefore possible to adapt the residual current device to the different requirements of the industrial plant according to the prospective fault frequencies generated on the load side of the release.
suddenly applied
with or without 0,006A
ABB SACE moulded-case circuit-breakers series Isomax1 and Tmax and air circuit-breakers series Emax1 can be combined with the switchboard residual current relay type RCQ, type A, with separate toroid (to be installed externally on the line conductors).
In presence of electrical apparatuses with electronic components (computers, photocopiers, fax etc.) the earth fault current might assume a non sinusoidal shape but a type of a pulsating unidirectional dc shape. In these cases it is necessary to use a residual current release classified as type A. In presence of rectifying circuits (i.e. single phase connection with capacitive load causing smooth direct current, three pulse star connection or six pulse bridge connection, two pulse connection line-to-line) the earth fault current might assume a unidirectional dc shape. 36
ASDC008003F0201
RC222 T4 T5 T4D T5D 85-500 85-500 250 400 0.03-0.05-0.10.03-0.05-0.10.3-0.5-1 0.3-0.5-1 3-5-10 3-5-10 Inst.-0.1-0.2Inst.-0.1-0.20.3-0.5-1-2-3 0.3-0.5-1-2-3 ± 20 ± 20
up to 2000 A rated currents
ac dc Trip threshold adjustements I∆n 1st range of adjustements 2nd range of adjustements Trip time adjustement
[V] [V] [A] [A] [s]
Tolerance over Trip times
RCQ 80 ÷ 500 48÷125 0.03 – 0.05 - 0.1 - 0.3 – 0.5 1 – 3 – 5 – 10 - 30 0 - 0.1 - 0.2 - 0.3 - 0.5 0.7 - 1 - 2 - 3 - 5 ± 20
The versions with adjustable trip times allow to obtain a residual current protection system coordinated from a discrimination point of view, from the main switchboard up to the ultimate load.
3.1 Electrical characteristics of circuit breakers
3.1 Electrical characteristics of circuit-breakers
Tmax moulded-case circuit-breakers Tmax T1 1P Rated uninterrupted current, Iu [A] Poles No. Poles Rated operational voltage, Ue
(ac) 50-60 Hz (dc)
[A] [No.] [V] [V] [kV] [V] [V]
Rated impulse withstand voltage, Uimp Rated insulation voltage, Ui Test Test voltage voltage at at industrial industrial frequency frequency for for 11 min. min. Rated ultimate short-circuit breaking capacity, Icu (ac) 50-60 Hz 220/230 V [kA] (ac) 50-60 Hz 380/415 V [kA] (ac) 50-60 Hz 440 V [kA] (ac) 50-60 Hz 500 V [kA] (ac) 50-60 Hz 690 V [kA] (dc) 250 V - 2 poles in series [kA] (dc) 250 V - 3 poles in series [kA] (dc) 500 V - 2 poles in series [kA] (dc) 500 V - 3 poles in series [kA] (dc) 750 V - 3 poles in series [kA] Rated service short-circuit breaking capacity, Ics (ac) 50-60 Hz 220/230 V [%Icu] (ac) 50-60 Hz 380/415 V [%Icu] (ac) 50-60 Hz 440 V [%Icu] (ac) 50-60 Hz 500 V [%Icu] (ac) 50-60 Hz 690 V [%Icu] Rated short-circuit making capacity, Icm (ac) 50-60 Hz 220/230 V [kA] (ac) 50-60 Hz 380/415 V [kA] (ac) 50-60 Hz 440 V [kA] (ac) 50-60 Hz 500 V [kA] (ac) 50-60 Hz 690 V [kA] Opening [ms] Opening time time (415 (415 V) V) Utilization category (EN 60947-2) Isolation behaviour Reference standard Releases: thermomagnetic T fixed, M fixed TMF T adjustable, M fixed TMD T adjustable, M adjustable (5…10 x In) TMA T adjustable, M fixed (3 x In) TMG T adjustable, M adjustable (2.5…5 x In) TMG magnetic only MA electronic PR221DS-LS/I PR221DS-I PR222DS/P-LSI PR222DS/P-LSIG PR222DS/PD-LSI PR222DS/PD-LSIG PR222MP Interchangeability Versions Terminals fixed plug-in withdrawable Fixing on DIN rail Mechanical life [No. operations] [No. hourly operations] Electrical life @ 415 V ac [No. operations] [No. hourly operations] Basic dimensions - fixed version L [mm] 4 poles L [mm] D [mm] H [mm] Weight fixed 3/4 poles [kg] plug-in 3/4 poles [kg] withdrawable 3/4 poles [kg] TERMINAL CAPTION F = Front
EF = Front extended ES = Front extended spread
FC Cu = Front for copper cables FC CuAl = Front for CuAl cables
160 3/4 690 500 8 800 3000
250 3/4 690 500 8 800 3000
V 200 200 180 150 80 100 – 100 – 70
N 70 36 30 25 20 36 – 25 – 16
400/630 3/4 690 750 8 1000 3500 H 100 70 65 50 40 70 – 50 – 36
660 440 396 330 176 5
154 75.6 63 52.5 40 6
160 1 240 125 8 500 3000 B 25 (*) – – – – 25 (at 125 V) – – – –
B 25 16 10 8 3 16 20 – 16 –
75% – – – –
75% 75% 100% 50% (25 kA) 75% 50% 75% 50% 75% 50%
52.5 – – – – 7 A ■ IEC 60947-2
52.5 32 17 13.6 4.3 7
■ – – – – – – – – – – – – – F FC Cu – – – 25000 240 8000 120 25.4 (1 pole) – 70 130 0.4 (1 pole) – –
– ■ – – – – – – – – – – – – F FC Cu-EF-FC CuAl -HR – – DIN EN 50022 25000 240 8000 120 76 102 70 130 0.9/1.2 – –
84 52.5 30 17 5.9 6 A ■ IEC 60947-2
N 65 36 30 25 6 36 40 – 36 –
S 85 50 45 30 7 50 55 – 50 –
H 100 70 55 36 8 70 85 – 70 –
L 120 85 75 50 10 85 100 – 85 –
100% 75% (70 kA) 75% 75% 75%
143 75.6 63 52.5 9.2 3
187 105 94.5 63 11.9 3
220 154 121 75.6 13.6 3
264 187 165 105 17 3
105 75.6 46.2 30 9.2 5
N 50 36 25 20 5 36 40 – 36 –
S 85 50 40 30 8 50 55 – 50 –
75% 50% 75% 50% (27 kA) 75% 50% 75% 50% 75% 50% 105 75.6 52.5 40 7.7 7
187 105 84 63 13.6 6
A ■ IEC 60947-2
– ■ – – – ■ (MF up to In 12.5 A) ■ ■ – – – – – – F-P F-FC Cu-FC CuAl-EF-ES-R F-FC Cu-FC CuAl-EF-ES-R – DIN EN 50022 25000 240 8000 120 90 120 70 130 1.1/1.5 1.5/1.9 –
– ■ – ■ – ■ – – – – – – – – F-P F-FC Cu-FC Cu Al-EF-ES-R F-FC Cu-FC Cu Al-EF-ES-R – DIN EN 50022 25000 240 8000 120 105 140 70 150 2.1/3 2.7/3.7 –
= Fixed circuit-breakers = Plug-in circuit-breakers
W = Withdrawable circuit-breakers
S 85 50 40 30 25 50 – 36 – 25
250/320 3/4 690 750 8 1000 3500 H 100 70 65 50 40 70 – 50 – 36
154 75.6 63 52.5 40 5
187 105 84 63 52.5 5
– ■ (up to 50 A) ■ – – ■ ■ ■ ■ ■ ■ ■ ■ ■ F-P-W F-FC Cu-FC CuAl-EF-ES-R-MC EF-ES-HR-VR-FC Cu-FC CuAl EF-ES-HR-VR-FC Cu-FC CuAl – 20000 240 8000 (250 A) - 6000 (320 A) 120 105 140 103.5 205 2.35/3.05 3.6/4.65 3.85/4.9
(*) The breaking capacity for settings In=16 A and In= 20 A is 16 kA
75% for T5 630 50% for T5 630 Icw = 5 kA
100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100%(1) 100%(2) 100% 100%(1) 100%(2) 100%(2) 187 220 440 105 154 264 84 143 220 63 105 187 52.5 84 154 6 6 6 A (630 A) - B (400 A)(3) ■ IEC 60947-2
660 440 396 330 176 6
– – ■ – ■ – ■ ■ ■ ■ ■ ■ ■ ■ F-P-W F-FC Cu-FC CuAl-EF-ES-R EF-ES-HR-VR-FC Cu-FC CuAl EF-ES-HR-VR-FC Cu-FC CuAl – 20000 120 7000 (400 A) - 5000 (630 A) 60 140 184 103.5 205 3.25/4.15 5.15/6.65 5.4/6.9 Notes: in the plug-in version of T2 and T3 the maximum setting is derated by 10% at 40 °C
SACE Isomax moulded-case circuit-breakers Rated uninterrupted current, Iu Poles Rated operational voltage, Ue
S6 800 3-4 690 750 8 800 3000
[A] No. [V] [V] [kV] [V] [V]
(ac) 50-60Hz (dc) Rated impulse withstand voltage, Uimp Rated insulation voltage, Ui Test voltage at industrial frequency for 1 min. Rated ultimate short-circuit breaking capacity, Icu (ac) 50-60 Hz 220/230 V [kA] (ac) 50-60 Hz 380/415 V [kA] (ac) 50-60 Hz 440 V [kA] (ac) 50-60 Hz 500 V [kA] (ac) 50-60 Hz 690 V [kA] (dc) 250 V - 2 poles in series [kA] (dc) 500 V - 2 poles in series [kA] (dc) 500 V - 3 poles in series [kA] (dc) 750 V - 3 poles in series [kA] Rated short-circuit service breaking capacity, Ics (2) [%Icu] Rated short-circuit making capacity (415 V) Icm [kA] Opening time (415V at Icu) [ms] Rated short-time withstand current for 1 s, Icw [kA] Utilization category (EN 60947-2) Isolation behaviour IEC 60947-2, EN 60947-2 Releases: thermomagnetic T adjustable, M adjustable TMA T adjustable, M fixed 2,5 In TMG with microprocessor PR211/P (I-LI) PR212/P (LSI-LSIG) Interchangeability Versions Terminals fixed
Mechanical life Electrical life (at 415 V) Basic dimensions, fixed
S 85 50 45 35 22 50 35 20
H 100 65 50 40 25 65 50 35
L 200 100 80 65 30 100 65 50
100% 100% 100% 74 105 143 10 9 8 10 B
75% 220 7
S 85 50 40 35 20 -
(3) The withdrawable version circuit-breakers must be fitted with the front flange for the lever operating mechanism or with its alternative accessories, such as the rotary handle or the motor operator
KEY TO TERMINALS F = Front EF = Extended front ES = Extended spreaded front
H 85 85 70 50 40 -
V 120 120 100 70 50 -
50% 187 20
50% 264 20
F-W F - EF - ES FC CuAl (1250A) HR - VR EF - HR - VR 10000/120 7000(1250A)5000(1600A)/20 210/280 138.5 406 17 / 22 21.8 / 29.2
EF - HR - VR 20000/120
KEY TO VERSIONS F = Fixed P = Plug-in W = Withdrawable
L 200 100 80 70 35 -
5000/60 210/280 103.5 268 9.5 / 12 12.1 / 15.1
L [mm] D [mm] H [mm] [kg] [kg] [kg]
S8 2000 - 2500 - 3200 3-4 690 8 690 2500
100% 75% 50% 105 143 220 22 22 22 15 (1250A) - 20 (1600A) B
F-W F - EF - ES - FC CuAl RC - R
plug-in withdrawable (3) [No. operations / operations per hours] [No. operations / operations per hours]
(1) All the versions with Icu=35kA are certified at 36kA (2) For S6 N/S/H circuit-breakers the performance percentage of Ics at 690V is reduced by 25%.
N 65 35 (1) 30 25 20 35 20 16
S7 1250 - 1600 3-4 690 8 800 3000 H 100 65 55 45 25 -
FC CuAl = Front for copper or aluminium cables R = Rear threaded RC = Rear for copper or aluminium cables HR = Rear horizontal flat bar
F F (2000-2500A) - VR
10000/20 2500(2500A)/201500(3200A)/10 406/556 242 400 57/76 VR = Rear vertical flat bar
Tmax moulded-case circuit-breakers for motor protection Rated uninterrupted current, Iu Rated current, In Poles Rated operational voltage,Ue
Rated impulse withstand voltage, Uimp Rated insulation voltage, Ui Test voltage at industrial frequency for 1 min. Rated ultimate short-circuit breaking capacity, Icu (ac) 50-60 Hz 220/230 V (ac) 50-60 Hz 380/415 V (ac) 50-60 Hz 440 V (ac) 50-60 Hz 500 V (ac) 50-60 Hz 690 V Rated short-circuit service breaking capacity, Ics (ac) 50-60 Hz 220/230 V (ac) 50-60 Hz 380/415 V (ac) 50-60 Hz 440 V (ac) 50-60 Hz 500 V (ac) 50-60 Hz 690 V Rated short-circuit making capacity, Icm (ac) 50-60 Hz 220/230 V (ac) 50-60 Hz 380/415 V (ac) 50-60 Hz 440 V (ac) 50-60 Hz 500 V (ac) 50-60 Hz 690 V Opening time (415 V) Utilization category (EN 60947-2) Isolation behaviour Reference Standard Protection against short-circuit Magnetic only release MA Electronic release PR221DS-I Integrated protection (IEC 60947-4-1) Electronic release PR222MP Interchangeability Versions Terminals fixed
[kA] [kA] [kA] [kA] [kA] [%Icu] [%Icu] [%Icu] [%Icu] [%Icu] [%Icu] [kA] [kA] [kA] [kA] [kA] [kA] [ms]
Basic fixed version dimensions
TERMINAL CAPTION F = Front EF = Front extended ES = Front extended spread FC Cu = Front for copper cables R = Rear orientated
250 100…200 3 690 500 8 800 3000 N S 50 85 36 50 25 40 20 30 5 8
V 300 200 180 150 80
S 85 50 45 30 7
Electrical life @ 415 V ac AC
160 1…100 3 690 500 8 800 3000 N 65 36 30 25 6
Fixing on DIN rail Mechanical life
Tmax T2 [A] [A] [No.] [V] [V] [kV] [V] [V]
[No. operations] [No.hourly operations] [No. operations] [No.hourly operations] L [mm] D [mm] H [mm] [kg] [kg] [kg] FC CuAl = Front for CuAl cables MC = Multicable HR = Rear in horizontal flat bar VR = Rear in vertical flat bar (*) Icw = 5 kA
H 100 70 55 36 8
L 120 85 75 50 10
100% 100% 100% 75% (70 kA) 100% 75% 100% 75% 100% 75% 220 154 121 75.6 13.6 3
250, 320 10…320 3 690 750 8 1000 3500 H 100 70 65 50 40
440 264 220 187 154 5
400, 630 320, 400, 630 3 690 750 8 1000 3500 H L 100 200 70 120 65 100 50 85 40 70
100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100%(1) 100%(2) 100%(1) 100%(2) 100%(2)
220 154 143 105 84 5 A
187 220 440 105 154 264 84 143 220 63 105 187 52.5 84 154 6 6 6 B (400 A)(*) - A (630 A)
■ (MF up to In 12.5 A) ■
– – F-P F - FC Cu - FC CuAl - EF ES - R - FC CuAl F - FC Cu - FC CuAl - EF ES - R - FC CuAl – DIN EN 50022 25000 240 8000 120 90 70 130 1.1 1.5 –
– – F-P F - FC Cu - FC CuAl - EF ES - R - FC CuAl F - FC Cu - FC CuAl - EF ES - R - FC CuAl – DIN EN 50022 25000 240 8000 120 105 70 150 2.1 2.7 –
F-P-W F - FC Cu - FC CuAl - EF - ES - R - MC
F-P-W F - FC Cu - FC CuAl - EF - ES - R
EF - ES - FC Cu - FC CuAl - HR - VR
EF - ES - FC Cu - FC CuAl - HR - VR – 20000 240 8000 120 105 103.5 205 2.35 3.6 3.85
EF - ES - FC Cu - FC CuAl - HR - VR – 20000 120 7000 60 140 103.5 205 3.25 5.15 5.4
75% for T5 630 50% for T5 630
SACE Isomax moulded-case circuit-breakers for motor protection [A] [A] No [V] [kV] [V] [V]
Rated uninterrupted current, Iu Rated current, In Poles Rated operational voltage (ac) 50-60 Hz, Ue Rated impulse withstand voltage, Uimp Rated insulation voltage, Ui Test volta ge at industrial frequency for 1 minute Rated ultimate short-circuit braking capacity, Icu (ac) 50-60Hz 220/230V (ac) 50-60Hz 380/415V (ac) 50-60Hz 440V (ac) 50-60Hz 500V (ac) 50-60Hz 690V Rated service short-circuit braking capacity, Ics Rated short-circuit making capacity (415Vac), Icm Opening time (415Vac at Icu) Utilization category (EN 60947-2) Insulation behaviour Reference standard IEC 60947-2, EN60947-2 IEC 60947-4-1, EN60947-4-1 Microprocessor-base release PR212/MP (L-R-I-U) PR211/P (I) Interhambiability Versions Terminals Fixed Plug-in Withdrawable Mechanical life
Basic dimensions, fixed 3 poles
S7 1250 / 1600 1000,1250 / 1600 3 690 8 8000 3000 H 100 65 55 45 25 0,75 75% 143 22 B
S 85 50 45 35 22 1 100% 105 9
H 100 65 50 40 25 100% (2) 143 8
L 200 100 80 65 30 0,75 75% 220 7
[No. of operations] [Operation per hour] L [mm] D [mm] H [mm] 3 poles fixed [kg] 3 poles plug-in [kg] 3 poles withdrawable [kg]
(1) All the versions with Icu=35kA are certified at 36kA (2) (3) For S6N/H circuit-breakers the percentage performance of Ics at 500V and 690V is reduced by 25%
N 65 35 (1) 30 25 20 100% (2) 74 10
[kA] [kA] [kA] [kA] [kA] [%Icu] [kA] [ms]
S6 630 / 800 630 / 800 3 690 8 800 3000
KEY TO VERSIONS F = Fixed P = Plug-in W= Withdrawable
S 85 50 40 35 20 1 100% 105 22
L 200 100 80 70 35 0,5 50% 220 22
N 65 35(1) 30 25 20 100% (2) (3) 74 9
800 630 3 690 8 8000 3000 H 100 65 50 40 25 100% (2) (3) 143 8 B
12150 1000 3 690 8 800 3000 L 200 100 80 65 35 0,75 75% 220 7
H 100 65 55 45 25 0,75 75% 143 22 B
F - EF - ES - FCCuAl - R - RC EF - HR - VR 20000 120 210 103.5 268 9.5 12.1
F - EF -ES -FCCuAl (1250A) - HR - VR EF - HR - VR 10000 120 210 138.5 406 17 21.8
F - EF -ES -FCCuAl - HR - VR EF - HR - VR 10000 120 210 138.5 406 17 21.8
FC CuAl = Front for copper or aluminium cables R = Rear threaded
RC = Rear for copper or aluminium cables HR = Rear horizontal flat bar VR = Rear vertical flat bar
SACE Emax air circuit-breakers Common data
Voltages Rated operational voltage Ue Rated insulation voltage Ui Rated impulse withstand voltage Uimp Test voltage at industrial frequency for 1 min. Service temperature Storage temperature Frequency f Number of poles Version
690 ~ 1000
[V] [°C] [°C] [Hz]
3500 ~ -25....+70 -40....+70 50 - 60 3-4 Fixed -Withdrawable
Performance levels Currents Rated uninterrupted current (at 40 °C) Iu
1250 1600 2000 2500 3200 100
Neutral pole capacity for four-pole circuit-breakers
[A] [A] [A] [A] [A] [%Iu]
Rated ultimate short-circuit breaking capacity Icu 220/230/380/400/415 V ~ 440 V ~ 500/660/690 V ~
100 100 85 (2)
100 100 85 (2)(3)
Rated service short-circuit breaking capacity Ics 220/230/380/400/415 V ~ 440 V ~ 500/660/690 V ~ Rated short-time withstand current Icw
50 50 36 50 36
65 65 55 55 42
130 110 65 10 –
75 75 75 75 65
85 85 85 75 65
130 110 65 15 –
100 100 85 (3) 100 75
125 125 100 100 85
88.2 88.2 75.6 B ■
105 105 75.6 B ■
88.2 88.2 88.2 B ■
143 143 121 B ■
286 242 187 A ■
143 143 143 B ■
165 165 165 B ■
220 220 187 B ■
220 220 220 B ■
330 330 220 B ■
Operating times Closing time (max) Breaking time for IIcw (max)
Overall dimensions Fixed: H = 418 mm - D = 302 mm L (3/4 poles) Withdrawable: H = 461 mm - D = 396.5 mm L (3/4 poles)
Weight (circuit-breaker complete with releases and CT, not including accessories) Fixed 3/4 poles Withdrawable 3/4 poles (including fixed part)
SACE Emax air circuit-breakers
with regular routine maintenance Frequency Electrical life (440 V ~) (690 V ~) Frequency
Overcurrent protection Microprocessor-based releases for ac applications
Rated uninterrupted current (@ 40 °C) Iu Mechanical life
Rated short-circuit making capacity Icm 220/230/380/400/415 V ~ 440 V ~ 500/660/690 V ~ Utilization category (in accordance with IEC 60947-2) Isolation behavior (in accordance with IEC 60947-2)
(1) Without intentional delays (2) Performance at 600 V is 100 kA (3) Performance at 500 V is 100 kA
E2 B-N
296/386 324/414
45/54 70/82
50/61 78/93
52/63 80/95
66/80 66/80 66/80 72/83 97/117 97/117 140/160 140/160 104/125 104/125 104/125 110/127 147/165 147/165 210/240 210/240
E3 N-S-H
E4 S-H
[Operations x 1000] [Operations per hour] [Operations x 1000] [Operations x 1000] [Operations per hour]
25 60 10 10 30
25 60 10 8 30
25 60 15 15 30
25 60 12 10 30
20 60 4 3 20
20 60 3 2 20
20 60 12 12 20
20 60 10 10 20
20 60 9 9 20
20 60 8 7 20
20 60 6 5 20
15 60 2 1.5 20
15 60 1.8 1.3 20
15 60 7 7 10
15 60 5 4 10
12 60 5 5 10
12 60 4 4 10
12 60 3 2 10
12 60 2 1.5 10
3.2 Trip curves
SACE Emax air circuit-breakers with full-size neutral conductor Rated uninterrupted current (at 40 °C) Iu
Number of poles Rated operational voltage Ue [V ~] Rated ultimate short-circuit breaking capacity Icu 220/230/380/400/415 V ~ [kA] 440 V ~ [kA] 500/660/690 V ~ [kA] Rated service short-circuit breaking capacity Ics 220/230/380/400/415 V ~ [kA] 440 V ~ [kA] 500/660/690 V ~ [kA] Rated short-time withstand current Icw (1s) [kA] (3s) [kA] Rated short-circuit making capacity Icm [kA] Utilization category (in accordance with IEC 60947-2) Isolation behavior (in accordance with IEC 60947-2) Overall dimensions Fixed: H = 418 mm - D = 302 mm L [mm] Withdrawable: H = 461 - D = 396.5 mm L [mm] Weight (circuit-breaker complete with releases and CT, not including accessories) Fixed [kg] Withdrawable (including fixed part) [kg]
4000 4 690
5000 6300 4 690
80 75 176 B ■
100 85 220 B ■
In = 16÷63 A
3.2.1 Trip curves of thermomagnetic and magnetic only releases
The overload protection function must not trip the breaker in 2 hours for current values which are lower than 1.05 times the set current, and must trip within 1.3 times the set current. By “cold trip conditions”, it is meant that the overload occurs when the circuit-breaker has not reached normal working temperature (no current flows through the circuit-breaker before the anomalous condition occurs); on the contrary “hot trip conditions” refer to the circuit-breaker having reached the normal working temperature with the rated current flowing through, before the overload current occurs. For this reason “cold trip conditions” times are always greater than “hot trip conditions” times. The protection function against short-circuit is represented in the time-current curve by a vertical line, corresponding to the rated value of the trip threshold I3. In accordance with the Standard IEC 60947-2, the real value of this threshold is within the range 0.8·I3 and 1.2·I3. The trip time of this protection varies according to the electrical characteristics of the fault and the presence of other devices: it is not possible to represent the envelope of all the possible situations in a sufficiently clear way in this curve; therefore it is better to use a single straight line, parallel to the current axis. All the information relevant to this trip area and useful for the sizing and coordination of the plant are represented in the limitation curve and in the curves for the specific let-through energy of the circuit-breaker under short-circuit conditions.
Trip curve thermomagnetic release
103 t [s]
1SDC210038F0004
In = 16 A ⇒ I3 = 500 A In = 20 A ⇒ I3 = 500 A
In = 25 A ⇒ I3 = 500 A In = 32 A ⇒ I3 = 500 A In = 40 A ⇒ I3 = 500 A In = 50÷63 A ⇒ I3 = 10 x In
102 x I1
3 General characteristics Trip curve thermomagnetic release T1 160 TMD
3 General characteristics Trip curve thermomagnetic release T2 160 MF
I3 = 13 x In
In = 80÷160 A
1SDC210039F0004
10-1 I3 = 10 x In
1SDC210045F0004
102 x In
3 General characteristics Trip curve thermomagnetic release T2 160 TMD
In = 1.6÷100 A
In = 125÷160 A 103
t [s] 102
1 In = 1,6÷12,5 A ⇒ I3 = 10xIn In = 20 A ⇒ I3 = 500 A
In = 25 A ⇒ I3 = 500 A In = 32 A ⇒ I3 = 500 A In = 40 A ⇒ I3 = 500 A In = 50÷100 A ⇒ I3 = 10 x In
1SDC210041F0004
1SDC210040F0004
In = 16 A ⇒ I3 = 500 A
3 General characteristics Trip curve thermomagnetic release T2 160/T3 250 MA
3 General characteristics Trip curve thermomagnetic release T3 250 TMD
I3 = 6…12 x In
In = 63÷250 A 103
1SDC210046F0004
1SDC210042F0004
3 General characteristics Trip curve thermomagnetic release T4 250 MA
3 General characteristics Trip curve thermomagnetic release T3 250 TMG
I3 = 6…14 x In
In = 63 A ⇒ I3 = 400 A In = 80 A ⇒ I3 = 400 A In = 100 A ⇒ I3 = 400 A
In = 160 A ⇒ I3 = 480 A
1SDC210073F0004
1SDC210076F0004
In = 125 A ⇒ I3 = 400 A In = 200 A ⇒ I3 = 600 A In = 250 A ⇒ I3 = 750 A
3 General characteristics Trip curve thermomagnetic release T4 250 TMD
3 General characteristics Trip curve thermomagnetic release T4 250/320 TMA
In = 20÷50 A
In = 80÷320 A 103
In = 32-50 A ⇒ I3 = 10 x In
1SDC210033F0004
1SDC210074F0004
In = 20 A ⇒ I3 = 320 A
10-1 I3 = 5…10 x In
3 General characteristics Trip curve thermomagnetic release T5 400/630 TMA
3 General characteristics Trip curve thermomagnetic release T5 400/630 TMG
In = 320÷630 A
In = 320÷630 A 103
1SDC210034F0004
1SDC210075F0004
10-1 I3 = 2,5…5 x In
3 General characteristics Trip curve thermomagnetic release S6 800 TMG
3 General characteristics Trip curve thermomagnetic release S6 800 TMA
In = 800 A 103
I3 = 2,5 x In
I3 = 5…10 x In
GSISO210
1SDC008004F0001
Example of thermomagnetic release setting
3.2.2 Trip curves of electronic releases
Consider a circuit-breaker type T1 160 In 160 and select, using the trimmer for thermal regulation, the current threshold, for example at 144 A; the magnetic trip threshold, fixed at 10·ln, is equal to 1600 A. Note that, according to the conditions under which the overload occurs, that is either with the circuit-breaker at full working temperature or not, the trip of the thermal release varies considerably. For example, for an overload current of 600 A, the trip time is between 1.2 and 3.8 s for hot trip, and between 3.8 and 14.8 s for cold trip. For fault current values higher than 1600 A, the circuit-breaker trips instantaneously through magnetic protection.
Introduction The following figures show the curves of the single protection functions available in the electronic releases. The setting ranges and resolution are referred to setting operations to be carried out locally. L FUNCTION (overload protection) t [s] 104
T1 160 - In 160 Time-Current curves
1SDC008006F0001
10-1 14.8 s
PR221 PR222 PR211
1SDC008005F0001
104 I [A]
PR212 PR111 PR112 PR113
I1 (0.4 – 0.44 – 0.48 – 0.52 – 0.56 – 0.6 – 0.64 – 0.68 – 0.72 – 0.76 – 0.8 – 0.84 – 0.88 - 0.92 – 0.96 – 1) x In (0.4…1) x In with step 0.02 x In (0.4 – 0.5 – 0.6 – 0.7 – 0.8 – 0.9 – 0.95 – 1) x In (0.4 – 0.5 – 0.55 – 0.6 – 0.65 – 0.7 – 0.75 – 0.8 – 0.85 – 0.875 – 0.9 – 0.925 – 0.95 - 0.975 – 1) x In (0.4 – 0.5 – 0.6 – 0.7 – 0.8 – 0.9 – 0.95 – 1) x In
t1 3s - 6s (@ 6 x I1) for T2 3s - 12s (@ 6 x I1) for T4, T5 3s - 6s - 9s - 18(1)s (@ 6xI1) A= 3s; B= 6s; C= 12s; D= 18s (@ 6 x I1)
(0.4 … 1) x In with step 0.01 x In
3 … 144s with step 3s (@ 3 x I1)
I1 PR221
1.1÷1.3 x I1
PR221 PR211
1.05÷1.3 x I1
1.1÷1.2 x I1
PR112 PR113
A= 3s; B= 6s; C= 12s; D= 18s (@ 6 x I1) A= 3s; B= 6s; C= 12s; D= 18s (@ 6 x I1)
for T4 In = 320 A and T5 In = 630 A → t1 = 12s.
Here below the tolerances:
t1 ± 10 % (up to 6 x In) ± 20 % (over 6 x In) ± 10 % ± 10 % (up to 2 x In) ± 20 % (over 2 x In) ± 10 % (up to 3 x In) ± 20 % (over 3 x In) ± 10 % (up to 4 x In) ± 20 % (over 4 x In)
S FUNCTION (short-circuit protection with time delay)
I FUNCTION (short-circuit istantaneous protection)
I2t=k
1SDC008007F0001
PR221 PR222 PR211 PR212 PR111 PR112 PR113
I2 (1 – 1.5 – 2 – 2.5 – 3 – 3.5 – 4.5 – 5.5 – 6.5 – 7 – 7.5 – 8 – 8.5 – 9 – 10 – OFF) x In 0.6…10 x In with step 0.6 x In
0.1s - 0.25s (@ 8 x I2) 0.05s - 0.1s - 0.25s - 0.5s (@ 8 x In)
(1 – 2 – 3 – 4 – 6 – 8 – 10 – OFF) x In
A= 0.05s; B= 0.1s; C= 0.25s; D= 0.5s (@ 8 x I2)
(0.6 … 10 – OFF) x In with step 0.1 x In
0.05 … 0.75s with step 0.01s (@ 10 x I2)
I3 (1 – 1.5 – 2 – 2.5 – 3 – 3.5 – 4.5 – 5.5 – 6.5 – 7 – 7.5 – 8 – 8.5 – 9 – 10 – OFF) x In (1.5 – 2.5 – 3 – 4 – 3.5 – 4.5 – 5 – 5.5 – 6.5 – 7 – 7.5 – 8 – 9 – 9.5 – 10.5 – 12 – OFF) x In(1)
(1.5 … 15 – OFF) x In with step 0.1 x In (1)
t2 ± 10 % up to 6 x In (T4-T5) ± 20 % over to 6 x In (T4-T5) ± 20 % (T2) ± 10 %(1)
PR111 ± 10 %
± 20 % (I2t=k) the best between ± 20 % and ± 50 ms (t=k) the best between ± 10 % and ± 50 ms (up to 4 x In, with t=k) the best between ± 15 % and ± 50 ms (over 4 x In, with t=k) ± 15 % (up to 4 x In, with I2t=k) ± 20 % (over 4 x In, with I2t=k)
PR112 ± 7 % (up to 4 x In) PR113 ± 10 % (over 4 x In) (1)
PR221 PR222 PR211 PR212
(1.5 – 2 – 4 – 6 – 8 – 10 – 12 – OFF) x In
Here below the tolerances: I2 ± 10 % (T4-T5) PR221 ± 10 % (up to 2 x In) ± 20 % (over 2 x In) PR222 ± 10 % PR211 ± 10 % PR212
I3 ± 10 % (T4-T5) ± 20 % (T2) ± 10 %
for T4 In = 320 A and T5 In = 630 A →I3 max = 10 x In
Tripping time: ≤ 25 ms ≤ 25 ms
35 ms up to 3 x In 30 ms over 3 x In
± 10 % up to 4 x In ± 15 % over 4 x In
The given tolerances are valid only if the release is self-supplied in steady state condition with two-phase or three-phase power supply.
Tollerance ± 10ms up to t2 = 0.1s.
1SDC008008F0001
3 General characteristics (I2t=k, t=k)
G FUNCTION (earth fault protection)
Trip curve electronic releases
T2 160 PR221DS
0,4-0,44-0,48-0,52-0,56-0,60-0,64-0,680,72-0,76-0,80-0,84-0,88-0,92-0,96-1 0,4
6,5 7 7,5 8 8,5 9 10 5,5
Up to In = 10 A
1SDC008009F0001
t=k 10-1
I2t=k 10-2 10-1
10-2 TSTM0006
10 Iu [kA]
x In I4 PR111 (1) (0.2 – 0.25 – 0.45 – 0.55 – 0.75 – 0.8 – 1 – OFF) x In PR212 (0.2 – 0.3 – 0.4 – 0.6 – 0.8 – 0.9 – 1 – OFF) x In PR111 (1) PR112 (0.2 … 1 – OFF) x In with step 0.02 x In PR113 (1)
t4 0.1s up to 3.15x14; 0.2s up to 2.25x14 0.4s up to 1.6x14; 0.8s up to 1.10x14 A= 0.1s; B= 0.2s; C= 0.4s; D= 0.8s (@ 4 x I4) 0.1 … 1s with step 0.05s (@ 4 x I4)
only with I2t=k characteristic only.
PR222 PR212 PR111 (1)
I4 ± 10 % ± 20 % ± 10 %
± 7 % up to 4 x In
t4 ± 20 % ± 20 % ± 20 % ± 20 % (I2t=k) the best between ± 10 % and ± 50 ms (t=k) up to 4 x In ± 15 % (I2t=k) the best between ± 10 % and ± 50 ms (t=k) up to 4 x In
Trip curve electronic releases T2 160 PR221DS
T4 250/320 T5 400/630 PR221DS
0,4-0,44-0,48-0,52-0,56-0,60-0,64-0,680,72-0,76-0,80-0,84-0,88-0,92-0,96-1
0,4-0,44-0,48-0,52-0,56-0,6-0,64-0,68-0,72-0,76-0,8-0,84-0,88-0,92-0,96-1
1,5 2 2,5 3 3,5 4,5 5,5 6,5 7 7,5
t [s] 3,5 4,5 5,5
10 -3 10 -1
1SDC210005F0004
TSTM0005
Trip curve electronic releases T4 250/320 T5 400/630 PR221DS
L-S Functions 0,4
1,5 2 2,5 3 3,5 4,5 5,5 6,5 7 7,5 8 8,5
T4 250/320 T5 400/630 PR222DS/P and PR222DS/PD
L-S-I Functions (I2t const = ON)
0,4-0,42-0,44-0,46-0,48-0,5-0,52-0,54-0,56-0,58-0,6-0,62-0,64-0,66-0,680,7-0,72-0,74-0,76-0,78-0,8-0,82-0,84-0,86-0,88-0,9-0,92-0,94-0,96-0,98-1 0,4
1,2 1,8 2,4
3 3,6 4,2 5,8 6,4 7 7,6 8,2 8,8 9,4 10 5,5
1SDC210004F0004
1SDC210001F0004
Note: The dotted curve of function L corresponds to the maximum delay (t 1) which can be set at 6xl1, in the case where 320 A CTs are used for T4 and 630 A for T5. For all the CT sizes t1=18s, except with 320 A CT (T4) and 630 A (T5) where t1=12s. For T4 In = 320 A and T5 In = 630 A ⇒ I3 max = 10 x In
L-S-I Functions (I2t const = OFF)
1,8 2,4 3 3,6 4,2 5,8 6,4
7 7,6 8,2 8,8 9,4 10
7,5 8 0,6
0,45 0,55 0,75
G Function 5,5 6,5
I4=0.2…0.49 In prevention at 4 In I4=0.5…0.79 In prevention at 6 In I4=0.8…1.00 In prevention at 8 In
1SDC210003F0004
1SDC210002F0004
Note: The dotted curve of function L corresponds to the maximum delay (t1) which can be set at 6xl1, in the case where 320 A CTs are used for T4 and 630 A for T5. For all the CT sizes t1=18s, except with 320 A CT (T4) and 630 A (T5) where t1=12s. For T4 In = 320 A and T5 In = 630 A ⇒ I3 max = 10 x In
Trip curve electronic releases T2 160 PR221DS-I
Trip curve electronic releases T4 250/320 T5 400/630 PR221DS-I
2,5 3 3,5 4,5 5,2 6,5 7 7,5 8 8,5 9 10
2 2,5 3 3,5 4,5 5,5 6,5 7 7,5 8 8,5 9 10
102 Overload limit
Overload limit T4 320 - T5 630
Overload limit T4 250 - T5 400
10-1 x In
1SDC210006F0004
1SDC210047F0004
Trip curve electronic releases T4 250 - T5 400 PR222MP
L Function (hot and cold trip)
L Function (hot trip with 1 or 2 phases supplied) 104
t [s] 103
102 10A
PR212/MP
I1 (0.4 ÷ 1) x In with step 0.01 x In
I1 According to IEC 60947-4-1
t1 4 – 8 – 16 – 24 s
PR222/MP
I1 ±15%
Here the tolerances
1SDC210048F0004
1SDC210049F0004
Here the tolerances t1 According to IEC 60947-4-1
t1 ±15%
R-U Functions
U function R function
4 5 6 7 8 10 10
1SDC210050F0004
R PR222/MP
I5 (3 - 4- 5 - 6 - 7 - 8 - 10 - OFF) x I1
t5 1 – 4 – 7 – 10 s
U PR222/MP
I6 ON (0.4 x I1) - OFF
t6 4s
I5 ± 15 %
t5 ± 10 %
I6 ± 15 %
t6 ± 10 %
1SDC210051F0004
I3 (6 - 7- 8 - 9 - 10 - 11 - 12 - 13) x In
I3 ± 15 %
S6 - S7 PR211/P
S6 - S7 - S8 PR212/P
0,4-0,5-0,55-0,6-0,65-0,7-0,75-0,80,85-0,875-0,9-0,925-0,95-0,975-1
L-S-I Functions, S inverse short delay (I2t = constant)
0,7 0,95 0,6 0,8 1 0,9
Note: for PR211/P-I releases, consider the curves relevant to function I only.
GSIS0212
GSIS0211
104 0,4-0,5-0,55-0,6-0,65-0,7-0,75-0,80,85-0,875-0,9-0,925-0,95-0,975-1
L-S-I Functions, S indipendent time delay 103 (t = constant)
103 1,5
GSIS0214
GSIS0213
Trip curve electronic releases S6 - S7 PR212/MP
L Function (hot trip with one or two phases supplied)
t1 According to IEC 60947-4-1
GSIS0217
GSIS0216
GSIS0218
x I1 R PR212/MP
U PR212/MP
I6 0.4 x I1
R PR212/MP
I5 ± 10 %
t5 ± 20 %
I6 ± 20 %
t6 ± 20 %
I3 (6 - 7- 8 - 9 - 10 - 11 - 12 - 13 - OFF) x In
The tolerances are according to IEC 60947-4-1.
GSIS0219
Trip curve electronic releases 104
Emax PR111/P
L-S-I Functions, S inverse short time delay (I2t = const.)
L- I Functions
L-S-I Functions, S indipendent time delay (t = constant) t [s]
G Function 103
Emax PR112/P-PR113/P
L-S-I Functions, S inverse short time delay (I2t = const.) t [s]
L-S-I Functions, S indipendent time delay (t = constant)
Trip curve electronic releases Emax PR112/P-PR113/P
PR113/P release – Function L in compliance with Std. IEC 60255-3 The following three curves refer to the protection function L complying with Std. IEC 60255-3 and integrate the standard one; they are applicable in coordination with fuses and MV circuit-breakers.
L Function, Normal Inverse Curve
t [s] 104 t [s] 102
t1 b = 0.2 ÷ 10 with step 0.1 s
Here below the tolerances: PR113
1.1÷1.25 x I1
± 30 % (2 ÷ 5) x In ± 20 % over 5 x In
3 General characteristics Trip curve electronic releases
L Function, Very Inverse Curve
L Function, Extremely Inverse Curve 104
Here below the tolerances: ± 30 % (2 ÷ 5) x In ± 20 % over 5 x In
PR113/P release – Other protection functions The following curves refer to the particular protection functions provided for PR113/P.
U Function, Phase Unbalance Protection
D Function, Directional Short Circuit Protection
t [s] 104 103
I7 (0.6 … 10 – OFF) x In with step 0.1 x In
I7 ± 10 %
t7 0.2 … 0.75s with step 0.01s
I6 (10% … 90% – OFF) with step 10%
I6 ± 10 %
t6 0.5 … 60s with step 0.5s
Here below the tolerances: t6 ± 20 %
t7 ± 20 %
UV Function, Undervoltage Protection
OV Function, Overvoltage Protection t [s] 104
10-2 0.5
I8 (0.6 … 0.95 – OFF) x Un with step 0.01 x Un
I8 ±5%
t8 0.1 … 5s with step 0.1s
I9 (1.05 … 1.2 – OFF) x Un with step 0.01 x Un
I9 ±5%
t9 0.1 … 5s with step 0.1s
Here below the tolerances: t8 ± 20 %
t9 ± 20 %
RV Function, Residual Voltage Protection
RP Function, Reverse Power Protection
10-1 -0.4
I10 (0.1 … 0.4 – OFF) x Un with step 0.05 x Un
I10 ±5%
t10 0.5 … 30s with step 0.5s
P11 (-0.3 … -0.1 – OFF) x Pn with step 0.02 x Pn
P11 ± 10 %
t11 0.1 … 25s with step 0.1s
Here below the tolerances: t10 ± 20 %
t11 ± 20 %
Example of electronic release setting
3.3 Limitation curves A circuit-breaker in which the opening of the contacts occurs after the passage of the peak of the short-circuit current, or in which the trip occurs with the natural passage to zero, allows the system components to be subjected to high stresses, of both thermal and dynamic type. To reduce these stresses, current-limiting circuit-breakers have been designed (see Chapter 2.2 “Main definitions”), which are able to start the opening operation before the short-circuit current has reached its first peak, and to quickly extinguish the arc between the contacts; the following diagram shows the shape of the waves of both the prospective short-circuit current as well as of the limited short-circuit current.
Considering a circuit-breaker type E1B1250 fitted with a PR111/P LSI release and with TA of 1000 A, it is supposed that for the system requirements, the protection functions are regulated according to the following settings: L S I
I1=0.6 I2=4 I3=8
t1=C t2=C (t=k)
The trip curve of the release is represented in the following figure (continuous lines): it can be seen that: • for function L, the curve is represented by the mean value between the tolerances given by the Standard (the overload protection function must not trip for current values lower than 1.05·ln, and must trip within 1.3·ln), therefore corresponding to 1.175·ln (around 700 A); • graphically, point 1 is obtained at the intersection of the vertical part of function L and the horizontal segment (C0.4In-C1In) which connects the points relevant to the same t1, taken from the curves with setting 0.4·ln and 1·ln; • corresponding to point 2 (4000 A), the function S takes the place of function L, as the trip time of function S is lower than the trip time of function L; • in the same way as for point 2, for point 3 (8000 A) and beyond, function S is substituted by function I. 104
l1=0.6, t1=C (12s) 103
1 C0.4In
1SDC008011F0001
l2=4, t2=C (0.25s) t=k
1SDC008010F0001
l3=8 10-2 10-1
The following diagram shows the limit curve for Tmax T2L160, In160 circuit-breaker. The x-axis shows the effective values of the symmetrical prospective short-circuit current, while the y-axis shows the relative peak value. The limiting effect can be evaluated by comparing, at equal values of symmetrical fault current, the peak value corresponding to the prospective short-circuit current (curve A) with the limited peak value (curve B). Circuit-breaker T2L160 with thermomagnetic release In160 at 400 V, for a fault current of 40 kA, limits the short-circuit peak to 16.2 kA only, with a reduction of about 68 kA compared with the peak value in the absence of limitation (84 kA).
102 I [kA]
3.3 Limitation curves
Limitation curves T1 160 Curve A
16.2 Curve B
100A 80A 40A÷63A 32A 20A-25A
Considering that the electro-dynamic stresses and the consequent mechanical stresses are closely connected to the current peak, the use of current limiting circuit-breakers allows optimum dimensioning of the components in an electrical plant. Besides, current limitation may also be used to obtain back-up protection between two circuit-breakers in series. In addition to the advantages in terms of design, the use of current-limiting circuit-breakers allows, for the cases detailed by Standard IEC 60439-1, the avoidance of short-circuit withstand verifications for switchboards. Clause 8.2.3.1 of the Standard “Circuits of ASSEMBLIES which are exempted from the verification of the short-circuit withstand strength” states that:
103 Irms [kA]
“A verification of the short-circuit withstand strength is not required in the following cases. … For ASSEMBLIES protected by current-limiting devices having a cut-off current not exceeding 17 kA at the maximum allowable prospective short-circuit current at the terminals of the incoming circuit of the ASSEMBLY. ...” The example above is included among those considered by the Standard: if the circuit-breaker was used as a main breaker in a switchboard to be installed in a point of the plant where the prospective short-circuit current is 40 kA, it would not be necessary to carry out the verification of short-circuit withstand. 108
1SDC210061F0004
1SDC008012F0001
Limitation curves T2 160
Limitation curves T3 250
230 V 80A÷160A 40A÷63A
16A 12,5A
80A 63A
105 Irms [kA]
1SDC210063F0004
1SDC210062F0004
Limitation curves T4 250/320
Limitation curves T5 400/630
100-320A 80A
32-50A 20-25A
1SDC200500F0001
1SDC200127F0001
80A÷160A 40A÷63A 25A-32A
20A 16A
10A 8A 6,3A 5A
4A 3,2A
40A÷63A
1SDC210065F0004
1SDC210064F0004
32A 20A-25A 16A
T4 250/320
Ip [kA] Ip [kA] 100-320A
102 80A 32-50A
160A 125A 100A
1SDC200128F0001
1SDC210066F0004
T5 400/630
T1 160 102
160A 125A 100A 80A 40A÷63A 32A
1SDC210028F0004
1SDC210024F0004
102 Irms [kA]
T3 250 102
250A 200A
6,3A 5A
1 2,5A 2A 1,6A 1A
1SDC210032F0004
1SDC210030F0004
100-320A 80A 32-50A 20-25A
1SDC210025F0004
3 General characteristics Limitation curves
Limitation curves T1 160
T2 160 10
690 V 100÷160A
80A÷160A
50÷80A
16÷40A
10A 8A 6,3A 5A 4A
3,2A 2,5A 2A 1,6A 1A
1SDC210067F0004
10 Irms [kA]
1SDC210068F0004
Ip [kA] Ip [kA] 100-320A 80A
32-50A 20-25A 10A
10 250A 200A 160A
1SDC210069F0004
1SDC200130F0001
S6 800 - S7 - S8 102
230 V S7
10 2 S6 800
GSIS0223
1SDC210026F0004
10 3 Irms [kA]
Limitation curves S6 800 - S7 - S8
S6 800 - S7 - S8
690 V S8
S6 800 S7
S6 800
GSIS0229
GSIS0235
Limitation curves E2L
660/690 V 380/400 V
660/690 V 380/400 V Ip [kA]
3.4 Specific let-through energy curves
3 General characteristics Specific let-through energy curves
3.4 Specific let-through energy curves In case of short-circuit, the parts of a plant affected by a fault are subjected to thermal stresses which are proportional both to the square of the fault current as well as to the time required by the protection device to break the current. The energy let through by the protection device during the trip is termed “specific let-through energy” (I2t), measured in A2s. The knowledge of the value of the specific let-through energy in various fault conditions is fundamental for the dimensioning and the protection of the various parts of the installation. The effect of limitation and the reduced trip times influence the value of the specific let-through energy. For those current values for which the tripping of the circuit-breaker is regulated by the timing of the release, the value of the specific let-through energy is obtained by multiplying the square of the effective fault current by the time required for the protection device to trip; in other cases the value of the specific let-through energy may be obtained from the following diagrams.
T1 160 10
The following is an example of the reading from a diagram of the specific letthrough energy curve for a circuit-breaker type T3S 250 In160 at 400 V. The x-axis shows the symmetrical prospective short-circuit current, while the y-axis shows the specific let-through energy values, expressed in (kA)2s. Corresponding to a short-circuit current equal to 20 kA, the circuit-breaker lets through a value of I2t equal to 1.17 (kA)2s (1170000 A2s).
I2t 10 3 [(kA)2s]
1SDC210052F0004
20A-25A 16A
10 2 10-2 1
1SDC008013F0001
Specific let-through energy curves T2 160
Specific let-through energy curves T3 250
1 80A√160A
40A√63A 25A-32A 20A
I 2 t [(kA) 2 s]
250A 10A
1SDC210057F0004
TSTM0013
1,6A 1A
10 -6 10 -2
10 5 Irms [kA]
Specific let-through energy curves T4 250/320
Specific let-through energy curves T5 400/630
1SDC210019F0004
T2 160 1
400-440 V 80A÷160A 40A÷63A
2,5A 2A
1SDC210055F0004
1SDC210054F0004
T4 250/320 10
I2t [(kA)2s] 250A 200A
1SDC210056F0004
T1 160 1
160A 125A
100A 80A 40A÷63A 32A 20A-25A 16A
1SDC210020F0004
1SDC210027F0004
T3 250 1
10-3 2,5A 2A 1,6A
1SDC210029F0004
104 Irms [kA]
1SDC210031F0004
500 V I2t [(kA)2s]
100-320A 80A 32-50A 20-25A 10A
1SDC210021F0004
690 V I2t [(kA)2s]
40A÷63A 25A-32A
100÷160A
12,5A 10A 8A 6,3A
0,05 10-4 4A 3,2A
1SDC210059F0004
1SDC210058F0004
I2t [(kA)2s] I2t [(kA)2s] 100-320A 80A
R100 R80 R63
1SDC210060F0004
Is [kA]
S6 800 - S7 - S8 10
I 2 t [(kA) 2 s] 10 3
GSIS0241
1SDC210022F0004
Specific let-through energy curves S6 800 - S7 - S8
I 2 t [(kA) 2 s] S7
S7 S6 800
GSIS0253
GSIS0247
Specific let-through energy curves E2L
Specific let-through energy curves E3L
660/690 V~ 380/400 V~
I 2 t [(kA) 2 s] 660/690 V
SDC200095F0001
!SDC200093F0001
3.5 Temperature derating
3 General characteristics Tmax T2
3.5 Temperature derating Standard IEC 60947-2 states that the temperature rise limits for circuit-breakers working at rated current must be within the limits given in the following table:
Table 1 - Temperature rise limits for terminals and accessible parts Description of part*
Temperature rise limits K 80 25 35
- Terminal for external connections - Manual operating metallic means: non metallic - Parts intended to be touched but not metallic 40 hand-held: non metallic 50 - Parts which need not be touched for metallic 50 normal operation: non metallic 60 * No value is specified for parts other than those listed but no damage should be caused to adjacent parts of insulating materials.
These values are valid for a maximum reference ambient temperature of 40°C, as stated in Standard IEC 60947-1, clause 6.1.1. Whenever the ambient temperature is other than 40°C, the value of the current which can be carried continuously by the circuit-breaker is given in the following tables: Circuit-breakers with thermomagnetic release Tmax T1 and T1 1P (*) In [A] 16 20 25 32 40 50 63 80 100 125 160
10 °C MIN MAX 13 18 16 23 20 29 26 37 32 46 40 58 51 72 64 92 81 115 101 144 129 184
20 °C MIN MAX 12 18 15 22 19 28 25 35 31 44 39 55 49 69 62 88 77 110 96 138 123 176
30 °C MIN MAX 12 17 15 21 18 26 24 34 29 42 37 53 46 66 59 84 74 105 92 131 118 168
40 °C MIN MAX 11 16 14 20 18 25 22 32 28 40 35 50 44 63 56 80 70 100 88 125 112 160
50 °C MIN MAX 11 15 13 19 16 23 21 30 26 38 33 47 41 59 53 75 66 94 82 117 105 150
60 °C MIN MAX 10 14 12 18 15 22 20 28 25 35 31 44 39 55 49 70 61 88 77 109 98 140
70 °C MIN MAX 9 13 11 16 14 20 18 26 23 33 28 41 36 51 46 65 57 81 71 102 91 130
In [A] 1 1.6 2 2.5 3.2 4 5 6.3 8 10 12.5 16 20 25 32 40 50 63 80 100 125 160
10 °C MIN MAX 0.8 1.1 1.3 1.8 1.6 2.3 2.0 2.9 2.6 3.7 3.2 4.6 4.0 5.7 5.1 7.2 6.4 9.2 8.0 11.5 10.1 14.4 13 18 16 23 20 29 26 37 32 46 40 57 51 72 64 92 80 115 101 144 129 184
20 °C MIN MAX 0.8 1.1 1.2 1.8 1.5 2.2 1.9 2.8 2.5 3.5 3.1 4.4 3.9 5.5 4.9 6.9 6.2 8.8 7.7 11.0 9.6 13.8 12 18 15 22 19 28 25 35 31 44 39 55 49 69 62 88 77 110 96 138 123 178
30 °C MIN MAX 0.7 1.1 1.2 1.7 1.5 2.1 1.8 2.6 2.4 3.4 2.9 4.2 3.7 5.3 4.6 6.6 5.9 8.4 7.4 10.5 9.2 13.2 12 17 15 21 18 26 24 34 29 42 37 53 46 66 59 84 74 105 92 132 118 168
40 °C MIN MAX 0.7 1.0 1.1 1.6 1.4 2.0 1.8 2.5 2.2 3.2 2.8 4.0 3.5 5.0 4.4 6.3 5.6 8.0 7.0 10.0 8.8 12.5 11 16 14 20 18 25 22 32 28 40 35 50 44 63 56 80 70 100 88 125 112 160
50 °C MIN MAX 0.7 0.9 1.0 1.5 1.3 1.9 1.6 2.3 2.1 3.0 2.6 3.7 3.3 4.7 4.1 5.9 5.2 7.5 6.5 9.3 8.2 11.7 10 15 13 19 16 23 21 30 26 37 33 47 41 59 52 75 65 93 82 117 105 150
60 °C MIN MAX 0.6 0.9 1.0 1.4 1.2 1.7 1.5 2.2 1.9 2.8 2.4 3.5 3.0 4.3 3.8 5.5 4.9 7.0 6.1 8.7 7.6 10.9 10 14 12 17 15 22 19 28 24 35 30 43 38 55 49 70 61 87 76 109 97 139
70 °C MIN MAX 0.6 0.8 0.9 1.3 1.1 1.6 1.4 2.0 1.8 2.6 2.3 3.2 2.8 4.0 3.6 5.1 4.5 6.5 5.6 8.1 7.1 10.1 9 13 11 16 14 20 18 26 23 32 28 40 36 51 45 65 56 81 71 101 90 129
MIN 49 62 77 96 123 154 193
MIN 46 59 74 92 118 147 184
MIN 44 56 70 88 112 140 175
MIN 41 52 65 82 104 130 163
MIN 38 48 61 76 97 121 152
MIN 35 45 56 70 90 112 141
Tmax T3 In [A] 63 80 100 125 160 200 250
MIN 51 64 80 101 129 161 201
MAX 72 92 115 144 184 230 287
MAX 69 88 110 138 176 220 278
MAX 66 84 105 132 168 211 263
MAX 63 80 100 125 160 200 250
MAX 59 75 93 116 149 186 233
MAX 55 69 87 108 139 173 216
MAX 51 64 80 100 129 161 201
(*) For the T1 1P circuit-breaker (fitted with TMF fixed thermomagnetic release), consider only the column corresponding to the maximum adjustment of the TMD releases.
3 General characteristics Circuit-breakers with electronic release
Tmax T4 In [A] 20 32 50 80 100 125 160 200 250 320
10 °C MIN MAX 19 27 26 43 37 62 59 98 83 118 103 145 130 185 162 230 200 285 260 368
20 °C MIN MAX 18 24 24 39 35 58 55 92 80 113 100 140 124 176 155 220 193 275 245 350
30 °C MIN MAX 16 23 22 36 33 54 52 86 74 106 94 134 118 168 147 210 183 262 234 335
40 °C MIN MAX 14 20 19 32 30 50 48 80 70 100 88 125 112 160 140 200 175 250 224 320
50 °C MIN MAX 12 17 16 27 27 46 44 74 66 95 80 115 106 150 133 190 168 240 212 305
60 °C MIN MAX 10 15 14 24 25 42 40 66 59 85 73 105 100 104 122 175 160 230 200 285
70 °C MIN MAX 8 13 11 21 22 39 32 58 49 75 63 95 90 130 107 160 150 220 182 263
Tmax T2 160 Fixed F EF ES FC Cu FC Cu R
up to 40 °C Imax [A] I1 160 1 160 1 160 1 160 1 160 1 160 1
In [A] 320 400 500 630
MIN 260 325 435 520
MAX 368 465 620 740
MIN 245 310 405 493
MAX 350 442 580 705
MIN 234 295 380 462
MAX 335 420 540 660
MIN 224 280 350 441
MAX 320 400 500 630
MIN 212 265 315 405
MAX 305 380 450 580
MIN 200 250 280 380
MAX 285 355 400 540
MIN 182 230 240 350
MAX 263 325 345 500
60 °C Imax [A] I1 140.8 0.88 140.8 0.88 140.8 0.88 140.8 0.88 140.8 0.88 140.8 0.88
70 °C Imax [A] I1 128 0.8 128 0.8 128 0.8 128 0.8 128 0.8 128 0.8
F = Front flat terminals; EF = Front extended terminals; ES = Front extended spread terminals; FC Cu = Front terminals for copper cables; FC CuAl = Front terminals for CuAl cables; R = Rear terminals
Tmax T4 250 Fixed
up to 40 °C Imax [A] I1
FC F HR VR
50 °C Imax [A] I1 153.6 0.96 153.6 0.96 153.6 0.96 153.6 0.96 153.6 0.96 153.6 0.96
50 °C Imax [A] I1
60 °C Imax [A] I1
70 °C Imax [A] I1
0.92 0.92 0.88 0.88
Plug-in - Withdrawable FC 250 F 250 HR 250 VR 250
240 240 230 230
0.88 0.88 0.84 0.84
FC = Front terminal for cables; F = Front flat terminals; HR = Rear flat horizontal terminals; VR = Rear flat vertical terminals.
Tmax T4 320 Fixed
SACE Isomax S6 800 In [A] 630 800
MIN 520 685
MAX 740 965
MIN 493 640
MAX 705 905
MIN 462 605
MAX 660 855
MIN 441 560
MAX 630 800
MIN 405 520
MAX 580 740
MIN 380 470
MAX 540 670
MIN 350 420
MAX 500 610
307 307 294 294
281 281 269 269
256 256 243 243
0.80 0.80 0.76 0.76
Plug-in - Withdrawable FC 320 F 320 HR 320 VR 320
294 307 294 294
0.92 0.96 0.92 0.92
268 282 268 268
0.84 0.88 0.84 0.84
242 256 242 242
0.76 0.80 0.76 0.76
3 General characteristics SACE Isomax S7 1600
Tmax T5 400 Fixed FC F HR VR
up to 40 °C Imax [A] I1 400 400 400 400
50 °C Imax [A] I1 400 400 400 400
60 °C Imax [A] I1 400 400 400 400
70 °C Imax [A] I1 368 368 352 352
Plug-in - Withdrawable FC 400 F 400
Tmax T5 630 Fixed FC F HR VR
up to 40 °C Fixed Imax [A] I1 Front flat bar 1600 1 Rear vertical flat bar 1600 1 Rear horizontal flat bar1600 1 Plug-in - Withdrawable Front flat bar 1600 Rear vertical flat bar 1600 Rear horizontal flat bar1600
up to 40 °C Fixed Imax [A] I1 Front flat bar 2000 1 Rear vertical flat bar 2000 1
605 605 580 580
554 554 529 529
504 504 479 479
Plug-in - Withdrawable F 630
up to 40 °C Fixed Imax [A] I1 Front flat bar 2500 1 Rear vertical flat bar 2500 1
SACE Isomax S8 3200
FC = Front terminal for cables; F = Front flat terminals; HR = Rear flat horizontal terminals; VR = Rear flat vertical terminals
1440 1440 1280
60 °C Imax [A] I1 1440 0.9 1440 0.9 1280 0.8
1280 1280 1120
70 °C Imax [A] I1 1280 0.8 1280 0.8 1120 0.7
1120 1120 906
SACE Isomax S8 2000
630 630<
50 °C Imax [A] I1 1520 0.95 1520 0.95 1440 0.9
50 °C Imax [A] I1 2000 1 2000 1
60 °C Imax [A] I1 1900 0,95 2000 1
70 °C Imax [A] I1 1715 0,85 1785 0,9
50 °C Imax [A] I1 2500 1 2500 1
60 °C Imax [A] I1 2270 0,9 2375 0,95
70 °C Imax [A] I1 2040 0,8 2130 0,85
50 °C Imax [A] I1 3060 0,95
60 °C Imax [A] I1 2780 0,85
70 °C Imax [A] I1 2510 0,8
SACE Isomax S8 2500
up to 40 °C Fixed Imax [A] I1 Rear vertical flat bar 3200 1
SACE Isomax S6 800 Fixed Front flat bar Front for cables Rear for cables Rear threaded
up to 40 °C Imax [A] I1 800 1 800 1 800 1 800 1
Plug-in - Withdrawable Front flat bar 800 Rear vertical flat bar 800 Rear horizontal flat bar 800
50 °C Imax [A] 800 800 800 800
60 °C Imax [A] I1 800 1 760 0.95 760 0.95 720 0.9
760 760 720
70 °C Imax [A] I1 760 0.95 720 0.9 720 0.9 640 0.8
720 720 640
SACE Isomax S7 1250 Fixed Front flat bar Rear vertical flat bar
up to 40 °C Imax [A] I1 1250 1 1250 1
50 °C Imax [A] I1 1250 1 1250 1
60 °C Imax [A] I1 1250 1 1250 1
70 °C Imax [A] I1 1187.5 0.95 1187.5 0.95
Front for cables 1250 Rear horizontal flat bar 1250
1187.5 1250
Plug-in - Withdrawable Front flat bar 1250 Rear vertical flat bar 1250 Rear horizontal flat bar 1250
1187.5 1187.5 1125
1125 1125 1000
Temperature [°C] 10 20 30 40 45 50 55 60 65 70
E1 800 % [A] 100 800 100 800 100 800 100 800 100 800 100 800 100 800 100 800 100 800 100 800
E1 1250 % [A] 100 1250 100 1250 100 1250 100 1250 100 1250 100 1250 100 1250 100 1250 99 1240 98 1230
E2 1250 % [A] 100 1250 100 1250 100 1250 100 1250 100 1250 100 1250 100 1250 100 1250 100 1250 100 1250
E2 1600 % [A] 100 1600 100 1600 100 1600 100 1600 100 1600 100 1600 100 1600 98 1570 96 1538 94 1510
E2 2000 % [A] 100 2000 100 2000 100 2000 100 2000 100 2000 97 1945 94 1885 91 1825 88 1765 85 1705
E3 1250 % [A] 100 1250 100 1250 100 1250 100 1250 100 1250 100 1250 100 1250 100 1250 100 1250 100 1250
E3 1600 % [A] 100 1600 100 1600 100 1600 100 1600 100 1600 100 1600 100 1600 100 1600 100 1600 100 1600
E3 2000 % [A] 100 2000 100 2000 100 2000 100 2000 100 2000 100 2000 100 2000 100 2000 100 2000 100 2000
E4 3200 % [A] 100 3200 100 3200 100 3200 100 3200 100 3200 100 3200 100 3200 100 3200 98 3120 95 3040
E4 4000 % [A] 100 4000 100 4000 100 4000 100 4000 100 4000 98 3900 95 3790 92 3680 89 3570 87 3460
E6 3200 % [A] 100 3200 100 3200 100 3200 100 3200 100 3200 100 3200 100 3200 100 3200 100 3200 100 3200
E6 4000 % [A] 100 4000 100 4000 100 4000 100 4000 100 4000 100 4000 100 4000 100 4000 100 4000 100 4000
Emax E2 Emax E6 Temperature [°C] 10 20 30 40 45 50 55 60 65 70
E6 5000 % [A] 100 5000 100 5000 100 5000 100 5000 100 5000 100 5000 100 5000 98 4910 96 4815 94 4720
E6 6300 % [A] 100 6300 100 6300 100 6300 100 6300 100 6300 100 6300 98 6190 96 6070 94 5850 92 5600
Emax E3 Temperature [C°] 10 20 30 40 45 50 55 60 65 70
E3 2500 % [A] 100 2500 100 2500 100 2500 100 2500 100 2500 100 2500 100 2500 100 2500 97 2425 94 2350
E3 3200 % [A] 100 3200 100 3200 100 3200 100 3200 100 3200 97 3090 93 2975 89 2860 86 2745 82 2630
The following table lists examples of the continuous current carrying capacity for circuit-breakers installed in a switchboard with the dimensions indicated below. These values refer to withdrawable switchgear installed in non segregated switchboards with a protection rating up to IP31, and following dimensions: 2300x800x900 (HxLxD) for E1 - E2 - E3; 2300x1400x1500 (HxLxD) for E4 - E6. The values refer to a maximum temperature at the terminals of 120 °C. For withdrawable circuit-breakers with a rated current of 6300 A, the use of vertical rear terminals is recommended.
The following tables show the maximum settings for L protection (against overload) for electronic releases, according to temperature, version and terminals.
Vertical terminals Type
E1B/N 08 E1B/N 12 E2N 12 E2B/N 16 E2B/N 20 E2L 12 E2L 16 E3S/H 12 E3S/H 16 E3S/H 20 E3N/S/H 25 E3N/S/H 32 E3L 20 E3L 25 E4H 32 E4S/H 40 E6V 32 E6V 40 E6H/V 50 E6H/V 63
800 1250 1250 1600 2000 1250 1600 1250 1600 2000 2500 3200 2000 2500 3200 4000 3200 4000 5000 6300
Continuous capacity [A] 35°C 45°C 55°C 800 800 800 1250 1250 1250 1250 1250 1250 1600 1600 1600 2000 2000 1800 1250 1250 1250 1600 1600 1500 1250 1250 1250 1600 1600 1600 2000 2000 2000 2500 2500 2500 3200 3100 2800 2000 2000 2000 2500 2390 2250 3200 3200 3200 4000 3980 3500 3200 3200 3200 4000 4000 4000 5000 4850 4600 6000 5700 5250
Busbars section [mm2] 1x(60x10) 1x(80x10) 1x(60x10) 2x(60x10) 3x(60x10) 1x(60x10) 2x(60x10) 1x(60x10) 1x(100x10) 2x(100x10) 2x(100x10) 3x(100x10) 2x(100x10) 2x(100x10) 3x(100x10) 4x(100x10) 3x(100x10) 4x(100x10) 6x(100x10) 7x(100x10)
Tmax T2 In ≤ 125A
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