Source: http://docplayer.net/23975963-En-iec-2-the-new-standard-for-low-voltage-power-switchgear-and-controlgear-assemblies.html
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EN (IEC) /2 The new standard for low-voltage power switchgear and controlgear assemblies - PDF
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1 SIVACON S8 EN (IEC) /2 siemens.com/sivacon
2 Dear SIVACON-Partners, with publication of the IEC we already informed you about the replacement of the IEC With the 1 st of November 2014 also the European series of standards EN will be replaced by EN ultimately. To avoid any problems for you or your customers we summarized the most important information for you. We don't want to promise too much but one is assured: With SIVACON you committed to high quality and security in low-voltage energy distribution. Therefore SIVACON switchboards already fully comply to the new switchboar standard EN (IEC) /2. So nothing will change for you. With best regards Florian Möbis Product Management SIVACON-Partnering Page 2
3 Overview 3 Essential Changes 6 Application 16 Summary 20 Page 3
4 Milestones of Switchboard Standards 1896 First publication of standards, rules and guidelines of the VDE with first security rules for switching and distribution boards VDE 0100 "Regulations on the installation of power circuits with nominal voltages below 1000V" VDE N Requirements for insulation, short-circuit withstand and protection against contact with live parts (1973) 1973 VDE 0660 part 5 factory assembled (EN (IEC) 60439) switchgear assemblies VDE b: Construction requirements for not factory assembled switching and distribution boards 1984 (1985) VDE 0660 part 500 (TTA) type-tested switchgear and VDE 0660 part 500 (PTTA) Partially type-tested switch- (EN (IEC) ) controlgear assemblies (EN (IEC) ) gear and controlgear assemblies joint construction requirements EN (IEC) / VDE /2 Page 4 New standard for power switchgear and controlgear assemblies
5 Reasons for the New Series of Standards EN (IEC) With the EN (IEC) the series of standards for low-voltage switchgear and controlgear assemblies was radically revised and restructured. The main reasons for this were the following key points of criticism about the pre norm EN (IEC) 60439: Difficult to understand and execute. o Grey areas leading to subjective interpretations o Poor structured content TTA / PTTA dilemma. o Misinterpreted categories o Limited applicability o Useless classification for end customers EN (IEC) part 1 with double function. o Product standard and o General requirements for all other standards of this series Some manufacturer and specific market segments are ignoring the EN (IEC) Page 5
6 SIVACON ALPHA SIVACON EN (IEC) /2 Replaced Standards EN (IEC) General rules Replaces EN (IEC) EN (IEC) EN (IEC) EN (IEC) EN (IEC) EN (IEC) Power switchgear and controlgear assemblies Distribution boards Assemblies for construction sites Assemblies for power distribution Busbar trunking systems Replaces EN (IEC) Replaces EN (IEC) Replaces EN (IEC) Replaces EN (IEC) Replaces EN (IEC) IEC/TR Guidance to specifying assemblies No preceding standard Page 6
7 New Terms and Definitions Power switchgear and controlgear assembly PSC-assembly Low-voltage switchgear and controlgear assembly used to distribute and control energy for all types of loads, intended for industrial, commercial and similar applications where operation by ordinary persons is not intended [EN (IEC) ; ]. Rated current of the assembly I na Total current which can be distributed by a switchgear and controlgear assembly, limited due to the main busbars and in-feeders. Rated current of a circuit I nc Current, which can be carried without overheating by a Circuit in a switchgear and controlgear assembly if only this circuit is under load. Rated diversity factor RDF o Specifies no longer the supposed loads of circuits but whose (proved) capability to carry a percentage of there rated current simultaneously. o The product of the rated current and the RDF of a circuit has to be equal or higher as the expected load of the circuit. o The RDF applies for the operation of the switchgear and controlgear assembly with their rated current (i.e. at maximum permissible load). Rated short-time withstand current I cw A standard value for the current flow duration is no longer defined in the standard (as yet in EN (IEC) : 1s) Page 7
8 Overview 3 Essential Changes 6 Application 16 Summary 20 Page 8
9 Overview Partition of the EN (IEC) in general rules and a product standard for power switchgear and controlgear assemblies. EN (IEC) EN (IEC) General rules o Black Box approach with defined interfaces. o Replacement of TTA and PTTA due to design verifications. o Replacement of routine tests due to routine verifications. o Distinction between original manufacturer and assembly manufacturer with separated verification responsibility. o Partition of the chapter constructional requirements in: constructional requirements and performance requirements with single changes. EN (IEC) Power switchgear and controlgear assemblies o Contains all requirements of the old EN (IEC) in terms of: gangways between switchboards, withdrawable unit design and internal separation. o Without significant changes of requirements. For Switchboards according to EN (IEC) the EN (IEC) & -2 applies in future. Page 9
10 Black-Box approach Installation and ambient conditions Black-Box approach o Creation of interfaces. o Specification of the interface parameters by the planner / operator. o The manufacturer is responsible for the solution. Operate & maintain Grid Electrical circuit connection and consumers Opens the standard for today s and future switchgear and controlgear assemblies. Page 10
11 Black-Box approach Page 11 Installation and ambient conditions Grid Electrical circuit connection and consumers Operate & maintain Installation and ambient conditions o Existing grid system (TN-C, TN-C-S, TN-S, TT, IT) o Degree of pollution o Indoor and / or outdoor installation o Stationary or non-stationary switchgear and controlgear assemblies o Degree of protection (IP) o Electromagnetic compatibility (EMC) o Special operating conditions (e.g. extreme thermal, atmospheric und climatic impacts,...) o External design (open / closed design, panel design, cubicle design,...) o Protection against mechanical impacts (IK code) o Structural type (Inserts or removable components) o Total mass and if required masses of components (Transport) o Dimensions and type of installation (free standing, wall installation, side by side, )
12 Black-Box approach Installation and ambient conditions Grid Electrical circuit connection and consumers Operate & maintain Grid connection o Rated voltage of the assembly o Rated frequency o Rated operating voltage o Measures for protection against electric shock (Protection class) o Rated Current of the Assembly o Rated impulse withstand voltage o Rated peak withstand current o Rated short-time withstand current o Rated conditional short-circuit current o Amount and Type of supply lines (Single-conductor or multi-conductor cables, cross-section, conductor material, connection type) U n f n U e I na U imp I pk I cw I cc Page 12
13 Black-Box approach Installation and ambient conditions Electrical circuit and consumers o Rated insulation voltage o Rated current of a circuit o Rated diversity factor U i I nc RDF Operate & maintain Operate & maintain o Intended operating personal (Expert, layperson) o Device operation (e.g. behind the door, from outside, ) o Door locking system (Locking handle, knob, with or without lock, ) Grid Electrical circuit connection and consumers Page 13
14 Design and Routine Verification Design verification Verification made on a sample of an assembly or on parts of assemblies to show that the design meets the requirements of the relevant assembly standard [EN (IEC) ; 3.9.1]. Design verifications can be provided by the following equal methods: Testing Electrical, mechanical and thermal Derivation comparison with a tested reference design Assessment Checking calculation and design rules The manufacturer is in charge to choose the allowed verification options Design verifications are replacing and extending type tests. Routine verification Verification about the compliance to the relevant assembly standard which has to be performed for every completed assembly. Routine verifications are replacing routine tests without significant changes. Page 14
15 SIVACON S8 / 8PT SIVACON S8 / 8PT EN (IEC) /2 Product and Verification Responsibility Distinction between original manufacturer and assembly manufacturer Original manufacturer (Siemens AG) Organization that has carried out the original design and the associated verification of an assembly in accordance with the relevant assembly standard [EN (IEC) ; ]. Assembly manufacturer (Partner) Organization taking the responsibility for the completed assembly [EN (IEC) ; ]. Design verification Changes on the original system Testing Derivation Assessment Design verifications for changes Routine verification Assembly / original system Ready-for-use assembly Page 15
16 Constructional and Performance Requirements Partition of the previous chapter constructional requirements in the chapters constructional requirements and performance requirements with single changes. 7 Constructional requirements 8 Constructional requirements 9 Performance requirements 8.1 Strength of materials and parts 8.2 Degree of protection provided by an assembly enclosure 8.3 Clearances and creepage distances 8.4 Protection against electric shock 8.5 Incorporation of switching devices and components 8.6 Internal electrical circuits and connections 8.7 Cooling 8.8 Terminals for external conductors 9.1 Dielectric properties 9.2 Temperature rise limits 9.3 Short-circuit protection and short-circuit withstand strength 9.4 Electromagnetic compatibility (EMC) Requirements for strength of materials and parts adopted from the standard for empty enclosures EN (IEC) Page 16
17 Overview 3 Essential Changes 6 Application 16 Summary 20 Page 17
18 Validity of Type Test Certificates According to EN (IEC) Where tests on the assembly have been conducted in accordance with the IEC series, and the test results fulfill the requirements of the relevant part of IEC 61439, the verification of these requirements need not be repeated. [EN (IEC) ; 10.1] Page 18
19 Constructional Requirements Changes 8.1 Strength of materials and parts Adopted requirements from the standard for empty enclosures EN (IEC) o Corrosion resistance o Thermal resistance of enclosure parts made of insulating material o UV Resistance of enclosure parts made of insulating material for outdoor installation o Protection against mechanical impacts (IK code) o Ability for transportation (lifting) Protection against contact with live parts, ingress of solid foreign bodies and water IPX2 is not applicable for fixed mounted assemblies which are not tilted in normal operation conditions. 8.4 Protection against electric shock Adoption of new terminologies and requirements from the fundamental safety standards: Previous terms Protection against direct contact Protection against indirect contact Replaced by Basic protection Fault protection Main circuits Minimum cross-section for neutral conductor: 50% of phase cross-sections and not smaller than 16 mm². Page 19
20 Performance Requirements Changes Co-ordination of protective devices If back-up protection is applied a warning sign on the assembly or a warning notice in the operating manual is mandatory, that the replacement of short-circuit protective devices by other device types is not allowed. Page 20
21 b) Performance a) Construction EN (IEC) /2 Allowed Alternatives for Design Verifications Chapter Characteristic to be verified Verification options available Testing Derivation Assessment 10.2 Strength of material and parts Resistance to corrosion Yes No No Properties of insulating materials Thermal stability Yes No No Resistance to abnormal heat and fire due to internal electric effects Yes No Yes Resistance to ultra-violet (UV) radiation Yes No Yes Lifting Yes No No Mechanical impact Yes No No Marking Yes No No 10.3 Degree of protection ofenclosures Yes No Yes 10.4 Clearance and Creepage distances Yes No No 10.5 Protection against electric shock and integrity of protective circuits Effective continuity between the exposed conductive parts of the assembly and the protective circuit Yes No No Short-circuit withstand strength of the protective circuit Yes Yes No 10.6 Incorporation of switching devices and components No No Yes 10.7 Internal electrical circuits and connections No No Yes 10.8 Terminals for external conductors No No Yes 10.9 Dielectric properties Power-frequency withstand voltage Yes No No Impulse withstand voltage Yes No Yes Temperature-rise limits Yes Yes Yes /No Short-circuit withstand strength Yes Yes/No No Electromagnetic compatibility (EMC) Yes No Yes Mechanical operation Yes No No Page 21
22 Allowed Alternatives for Design Verifications Temperature-rise limits Testing Derivation Derivation from similar variants of tested designs. [EN (IEC) ; ] Assessment Assessment via calculation allowed for I na 1600A. For I na > 1600A temperature-rise verifications according to EN (IEC) have to be provided by testing and derivations; assessments via calculation are only allowed for assemblies up to 1600A. Short-circuit withstand strength Testing Derivation Only if the worst variant of an assembly was tested, the results of these tests can be used for verification of favorably variants by derivation. The short-circuit withstand strength according to EN (IEC) can be certificated by derivation for parts of an assembly if the worst variant was tested before. Page 22
23 Routine Verifications Dielectric test New test voltage versus EN (IEC) Test period Voltage source 1s 500VA, AC, 45-65Hz, 200 ma Test voltage Rated insulation voltage U i (line to line) [V] Test voltage a.c. - r.m.s. [V] U i < U i < U i < U i < U i Please check the setting possibilities of your test equipment according to the new test parameters for routine verifications. Page 23
24 Assembly Designation Marking Type label The assembly manufacturer has to provide each assembly with at least one durable label, which is visible when the assembly is installed and in operation. These labels have to include at least the following information: Assembly manufacturer's name or trade mark Type label example of the Siemens AG Type designation or other identification For requesting information about the assembly from the assembly manufacturer. Designation to identify the date of manufacturing Relevant assembly standard EN (IEC) Page 24
25 Overview 3 Essential Changes 6 Application 16 Summary 20 Page 25
26 Summary Switchgear and controlgear assemblies only classified by their application area o Common practice for other products. o Kind of verification is irrelevant for customers. Same technical requirements for all applications / products Even more clearly as before. Systematically covering of the complete range Testing of random examples is not sufficient. Verification always includes devices! A verification for a device X is not automatically valid for a replacement with a device Y of another device series of the same or a different manufacturer. Page 26
27 Summary Page 27
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