- 機械安全国際規格の紹介 -機械の電気装置の安全（IEC 60204-1）
平成28年11月10日（木）日本橋公会堂 ４階ホール
主催：一般社団法人 日本機械工業連合会
IDEC株式会社
国際標準化・知財推進センター
安全標準化推進グループ
セーフティリードアセッサ
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Copyright
2016 IDEC CORPORATION.
All rights reserved.

岡田和也

20161110 機械安全国際規格の紹介 機械の電気装置の安全（IEC 60204-1）

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IEC60204-1について
IEC 60204-1:2016
Safety of machinery -Electrical equipment of machines Part 1: General requirements
JIS B 9960-1:
機械類の安全性 －機械の電気装置－
第1部：一般要求事項 （現在JIS化推進中）
機械における電気設備での感電・電気火災等に対する安全性要求事項を規定する国際規格
改訂履歴
1997年10月 第４版発行
2005年10月 第５版発行
2016年10月 第６版発行
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Introduction

人と財産の安全確保（safety of persons and property）
制御応答の一貫性（正しい制御･応答）の確保（consistency of control response）
操作と保全の容易性の確保（ease of operation and maintenance）

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IEC60204-1
Figure 1 Block diagram of a typical machine
マーキング、警告標識および略号(16)
技術文書の作成(17)

物理的環境
(4.4)

電源断路器(5.3)
感電保護(6)装置の保護(7)
接地（PE）端子(5.2)
保護ボンディング回路(8.2)
制御回路および制御機能(9)非常停止機能(9.2.2.4)
コントロールギア(11)
付属品及び照明(15)

電源
(4.3)

PE
（外部保護導体接続）
導体及びケーブル(12)配線方法(13)
検証(18)電動機
制御装置

電動機(14)とﾄﾗﾝｽﾃﾞュｰｻ

システム/セル
制御装置

データリンク

非常停止用機器(10.7)

プログラマブルコントローラ

操作盤
(10)

入出力
インターフェイス

安全防護物
と警報機器

アクチュエータとセンサ
処理装置

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3.1. Terms and definitions
新たな用語（１）3.1.4 basic protection
protection against electric shock under fault-free conditions
Note 1 to entry: Previously referred to as “protection against direct contact”

3.1.8 conductor wire conductor bar
conductive wire or bar of a feeder system with a sliding current collector
3.1.12 control station operator control stationassembly of one or more control actuators (see 3.1.1) fixed on the same
panel or located in the same enclosure
Note 1 to entry: A control station may also contain related equipment, for example,
potentiometers, signal lamps, instruments, display devices, etc

3.1.18 earth local earth / ground (US) local ground (US)part of the Earth which is in electric contact with an earth electrode and the electricalpotential of which is not necessarily equal to zero
3.1.25 electrical equipment
items used in connection with the utilization of electricity by machines or parts ofmachines, for example material, fittings, devices, components, appliances, fixtures,apparatus, and the like used as part of, or in connection with, the electricalequipment of machines similar
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3.1. Terms and definitions
新たな用語（２）3.1.31 fault protection
protection against electric shock under single-fault conditions
Note 1 to entry: Previously referred to as “protection against indirect contact”
3.1.37 interlock (for safeguarding)arrangement that interconnects guard(s) or device(s) with the control system and/or
all or part of the electrical supply to the machine of devices operating together to:• prevent hazardous situations, or• prevent damage to equipment or material, or• prevent specified operations, or• ensure correct operations

3.1.48 prospective short-circuit current Icp
r.m.s. value of the current which would flow when the supply conductors to theelectrical equipment are short-circuited by a conductor of negligible impedance
located as near as practicable to the supply terminals of the electrical equipment

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3.1. Terms and definitions
新たな用語（３）3.1.51 protective conductor
conductor providing a primary fault current path from the exposed conductive
parts of the electrical equipment to a protective earthing (PE) terminal
3.1.57 safety function
function of a machine whose failure can result in an immediate increase of
the risk(s)3.1.60 short-circuit current rating
value of prospective short-circuit current that can be withstood by theelectrical equipment for the total operating time (clearing time) of the shortcircuit protective device (SCPD) under specified conditions
3.1.61 skilled person electrically skilled person
person with relevant training, education and experience to enable him or her
to perceive risks and to avoid hazards associated with electricity

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3.2 . Abbreviated terms
略号
AWG
AC
BDM
CCS
DC
EMC
EMI
IFLS
MMI
PDS
PELV
RCD
SPD
SCPD
SELV
SLP
STO

American Wire Gauge
Alternating Current
Basic Drive Module
Cableless Control System
Direct Current
Electro-Magnetic Compatibility
Electro-Magnetic Interference
Insulation Fault Location System
Man-Machine interface
Power Drive System
Protective Extra-Low Voltage
Residual Current protective Device
Surge Protective Devices
Short-Circuit Protective Device
Safe Extra-Low Voltage
Safely-Limited Position
Safe Torque Off

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4 General requirements
4.4.2 Electromagnetic compatibility (EMC) 本文の簡略化
 EMC対策はAnnex Hに例示された

 NOTE 1に 一般的なEMC関連規格が示されている。
IEC 61000-6-1：電磁両立性(EMC)－第6-1部：一般規格－
住宅，商業及び軽工業環境のイミュニティ規格
IEC 61000-6-2：電磁両立性(EMC)－第6-2部：一般規格－
工業環境のイミュニティ規格
IEC 61000-6-3：電磁両立性(EMC)－第6-3部：一般規格－
住宅，商業及び軽工業環境のエミッション規格
IEC 61000-6-4：電磁両立性(EMC)－第6-4部：一般規格－
工業環境のエミッション規格
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Annex H（informative)
Annex H (informative)
Measures to reduce the effects of electromagnetic influences
H.1 Definitions
For the purposes of Annex H only, the following terms and definitions apply.
H.1.1 apparatus
H.1.2 fixed installation
H.2 General
This Annex H provides recommendations to improve electromagnetic immunity andreduce emission of electromagnetic disturbances

H.3 Mitigation of electromagnetic interference (EMI)
H.3.1 General
H.3.2 Measures to reduce EMI

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5. Incoming supply conductor terminations anddevices for disconnecting and switching off
5.3.4 Operating means of the supply disconnecting device
The operating means (for example, a handle) of the supply disconnecting device
shall be external to the enclosure of the electrical equipment.
Exception: power-operated switchgear need not be provided with a handle
outside the enclosure where other means (e.g. pushbuttons) are provided toopen the supply disconnecting device from outside the enclosure.
～中略～Where the external operating means is not intended for emergency operations:– it is recommended that it be coloured BLACK or GREY (see 10.2)– a supplementary cover or door that can be readily opened without the use of a
key or tool may be provided, for example for protection against environmental
conditions or mechanical damage. Such a cover/door shall clearly show that itprovides access to the operating means. This can be achieved, for example, by
use of the relevant symbol IEC 60417-6169-1 (2012-08) (Figure 2) or IEC 604176169-2 (2012-08), (Figure 3).

Figure 2 – Disconnector isolator
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5. Incoming supply conductor terminations anddevices for disconnecting and switching off
5.4 Devices for switching off removal of power for prevention of
unexpected start-up
Devices that do not fulfil the isolation function (for example a contactor
switched off by a control circuit, or Power Drive System (PDS) with a
Safe Torque Off (STO) function in accordance with IEC 61800-5-2)
may only be provided where intended to be used for situations that
include used for prevention of unexpected start-up during tasks
such as:– inspections;– adjustments;– work on the electrical equipment where:• there is no hazard arising from electric shock (see Clause 6) andburn;• the switching off means remains effective throughout the work;• the work is of a minor nature (for example, replacement of plug-in
devices without disturbing existing wiring).
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6 Protection against electric shock
The electrical equipment shall provide protection of persons against electric
shock by:–basic protection (see 6.2 and 6.4), and;–fault protection (see 6.3 and 6.4).
6.2 Basic protection
In the case of plugs or similar devices, the withdrawal of which results in the
exposure of conductors (for example pins), the discharge time to 60 V shall not
exceed 1 s, otherwise such conductors shall be protected to at least IP2X or
IPXXB. If neither a discharge time of 1 s nor a protection of at least IP2X or
IPXXB can be achieved (for example in the case of removable collectors on
conductor wires, conductor bars, or slip-ring assemblies, see 12.7.4), additionalswitching devices or an appropriate warning, for example a warning sign drawing
attention to the hazard and stating the delay required shall be provided. Whenthe equipment is located in places open to all persons, which can include
children, warnings are not sufficient and therefore a minimum degree ofprotection against contact with live parts to IP4X or IPXXD is required.
NOTE Frequency converters and DC bus supplies could have typically a longer
discharge time than 5 s.
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6 Protection against electric shock
6.3 Fault protection
6.3.3 Protection by automatic disconnection of supply
This protective measure comprises both:– protective bonding of exposed conductive parts (see 8.2.3),– and one of the following:a) In TN systems, the following protective devices may be used:• overcurrent protective devices ;• residual current protective devices (RCDs) and associatedovercurrent protective device(s).
NOTE 2 The preventive maintenance can be enhanced by use of aresidual current monitoring device, RCM, complying withIEC 62020.

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6 Protection against electric shock
6.3 Fault protection
6.3.3 Protection by automatic disconnection of supplyb) in TT systems, either:• RCDs and associated overcurrent protective device(s) toinitiate the automatic disconnection of the supply on detectionof an insulation fault from a live part to exposed conductive
parts or to earth, or• overcurrent protective devices may be used for fault
protection provided a suitably low value of the fault loop
impedance Zs (see A.2.2.3) is permanently and reliably
assured;NOTE 3 The preventive maintenance can be enhanced by use of aresidual current monitoring device, RCM, complying withIEC 62020.

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6 Protection against electric shock
6.3 Fault protection
6.3.3 Protection by automatic disconnection of supplyc) in IT systems the relevant requirements of IEC 60364-4-41 shall be
fulfilled. During an insulation fault, an acoustic and optical signal shallbe sustained. After annunciation, the acoustic signal may then be
manually muted. This can require an agreement between the supplierand user regarding the provision of insulation monitoring devices and/or
insulation fault location system(s).
NOTE 4 In large machines, the provision of an insulation fault location system(IFLS) in accordance with IEC 61557-9 can facilitate maintenance.

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6 Protection against electric shock
6.3 Fault protection
6.3.3 Protection by automatic disconnection of supply

Where automatic disconnection is provided in accordance with a), anddisconnection within the time specified in A.1.1 cannot be assured,supplementary protective bonding shall be provided as necessary to meetthe requirements of A.1.3.
Where a power drive system (PDS) is provided, fault protection shall be
provided for those circuits of the power drive system that are supplied by
the converter. Where this protection is not provided within theconverter, the necessary protection measures shall be inaccordance with the converter manufacturer’s instructions.

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7 Protection of equipment
7.2.3 Power circuits
Devices for detection and interruption of overcurrent, selected inaccordance with 7.2.10, shall be applied to each live conductor including
circuits supplying control circuit transformers.
7.2.4 Control circuits– in control circuits not connected to the protective bonding circuit;• where the same cross sectional area conductors are used in allcontrol circuits all control circuits of the equipment have thesame current carrying capacity, by inserting an overcurrent
protective device into the switched conductor, and or;• where different cross sectional areas conductors are used in different
sub-circuits control circuits of the equipment have different
current carrying capacity, by inserting an overcurrent protective
device into both switched and common conductors of each subcontrol circuit.
Exception: Where the supply unit provides current limiting below thecurrent carrying capacity of the conductors in a circuit and below thecurrent rating of connected components, no separate overcurrent
protective device is required.
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7 Protection of equipment
7. 4 Current limiting protection 削除
7.10 circuit current rating
The short-circuit current rating of the electrical equipment shall be
determined. This can be done by the application of design rules or by
calculation or by test.
NOTE The short-circuit current rating may be determined, for example, in
accordance with IEC 61439-1, IEC 60909-0, IEC/TR 60909-1, or IEC/TR 61912-1.
IEC 61439-1:低電圧開閉装置及び制御装置アセンブリ－第1部：一般規則
IEC 60909-0:三相交流システムの短絡電流－第0部：電流の計算
IEC/TR 60909-1:三相交流システムの短絡電流－第1部：IEC 60909による短絡電流計算のための係数
IEC/TR 61912-1:低電圧開閉装置及び制御装置－過電流保護装置－
第1部：短絡定格の適用
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8 Equipotential bonding
8.1 General
The objective of functional bonding (see 8.4) is to minimize reduce:– the consequence of an insulation failure which could affect theoperation of the machine;– the consequences of electrical disturbances to sensitive electricalequipment which could affect the operation of the machine.
– electrical disturbances to sensitive electrical equipment which
could affect the operation of the machine;– induced currents from lightning which could damage the electric
equipment.

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8 Equipotential bonding

Figure 4 – Example of equipotential bonding for electrical equipment of a machine
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8 Equipotential bonding
Protective bonding circuit:(1)

Interconnection of protective conductor(s) and the PE terminal(2)

Connection of exposed conductive parts(3)

Protective conductor connected to an electrical equipment mounting plate used as a protective conductor(4)

Connection of conductive structural parts of the electrical equipment(5)

Conductive structural parts of the machine
Parts connected to the protective bonding circuit which are not to be used as protective conductor:(6)

Metal ducts of flexible or rigid construction(7)

Metallic cable sheaths or armouring(8)

Metallic pipes containing flammable materials(9)

Extraneous-conductive-parts, if earthed independently from the power supply of the machine and liable tointroduce a potential, generally the earth potential, (see 17.2 d)), e.g.:
metallic pipes, fences, ladders, handrails.

(10)

Flexible or pliable metal conduits(11)

Protective bonding of support wires, cables tray and cable ladders

Connections to the protective bonding circuit for functional reasons:(12)

Functional bonding
Legend to reference designations:

T1

Auxiliary transformer

U1

Mounting plate of electrical equipment

Figure 4 – Example of equipotential bonding for electrical equipment of a machine
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8 Equipotential bonding
8.2 Protective bonding circuit
8.2.1 General
The cross-sectional area of every protective conductor which does
not form part of a cable or which is not in a common enclosure with theline conductor shall be not less than
– 2,5 mm2 Cu or 16 mm2 Al if protection against mechanical damageis provided,– 4 mm2 Cu or 16 mm2 Al if protection against mechanical damage
is not provided.
NOTE The use of steel for a protective conductor is not excluded.

A protective conductor not forming part of a cable is considered to bemechanically protected if it is installed in a conduit, trunking or protected
in a similar way. Conductive structural parts of equipment in accordancewith 6.3.2.2 need not be connected to the protective bonding circuit.
Conductive structural parts of the machine need not be connected to theprotective bonding circuit where all the equipment provided is inaccordance with 6.3.2.2.
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8 Equipotential bonding
8.2 Protective bonding circuit
8.2.2 Protective conductors
Metal enclosures or frames or mounting plates of electrical equipment,
connected to the protective bonding circuit, may be used as protective
conductors if they satisfy the following three requirements:• their electrical continuity shall be assured by construction or bysuitable connection so as to ensure protection against mechanical,
chemical or electrochemical deterioration;• they comply with the requirements of 543.1 of IEC 60364-5-54:2011;• they shall permit the connection of other protective conductors at
every predetermined tap-off point.
The cross-sectional area of protective conductors shall either becalculated in accordance 543.1.2 of IEC 60364-5-54:2011, or selected inaccordance with Table 1 (see 5.2). See also 8.2.6. and 17.2 (d) of thisdocument.

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8 Equipotential bonding
8.2 Protective bonding circuit
8.2.2 Protective conductors
Each protective conductor shall:• be part of a multicore cable, or;• be in a common enclosure with the line conductor, or;• have a cross-sectional area of at least;• 2,5 mm2 Cu or 16 mm2 Al if protection against mechanical damage isprovided;• 4 mm2 Cu or 16 mm2 Al if protection against mechanical damage is
not provided.

NOTE 1 The use of steel for a protective conductor is not excluded.
A protective conductor not forming part of a cable is considered to bemechanically protected if it is installed in a conduit, trunking or protected
in a similar way.

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8 Equipotential bonding
8.4 Functional bonding
Functional bonding connecting points should be marked or labelled
as such using the symbol IEC 60417-5020:2002-10 (see Figure 6).

Figure 6 – Symbol IEC 60417-5020: Frame or chassis

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9 Control circuits and control functions
9.1 Control circuits
9.1.1 Control circuit supply
Where control circuits are supplied from an AC source, transformers
having separate windings shall be used to separate the power supply
from the control supply.

Examples include:• control transformers having separate windings in accordance withIEC 61558-2-2,• switch mode power supply units in accordance with IEC 61558-2-16
fitted with transformers having separate windings,• low voltage power supplies in accordance with IEC 61204-7 fittedwith transformers having separate windings.

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9 Control circuits and control functions
9.1 Control circuits
9.1.2 Control circuit voltages
The nominal value of the control voltage shall be consistent with thecorrect operation of the control circuit.
The nominal voltage of AC control circuits should preferably not exceed– 230 V for circuits with 50 Hz nominal frequency,– 277 V for circuits with 60 Hz nominal frequency.
The nominal voltage of DC control circuits should preferably not exceed
220 V.

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9 Control circuits and control functions
9.2 Control functions
9.2.1 General
9.2.2 Categories of stop functions
NOTE For removal of power it can be sufficient to remove thepower needed to generate a torque or force. This can be achieved
by declutching, disconnecting, switching off, or by electronicmeans (e.g. a PDS in accordance with IEC 61800 series), etc.
9.2.3 Operation
9.2.3.2 Start
Start functions shall operate by energizing the relevant circuit.
The provision of acoustic and/or visual warning signals before thestarting of hazardous machine operation should be considered.

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9 Control circuits and control functions
9.2 Control functions
9.2.3.5 Operating modes
Each machine can have one or more operating modes (for example
manual mode, automatic mode, setting mode, maintenance mode)
determined by the type of machine and its application.
Where machinery has been designed and constructed to allow its use in
several control or operating modes requiring different protective
measures and having a different impact on safety, it shall be fitted witha mode selector which can be locked in each position (for example
key operated switch). Each position of the selector shall be clearly
identifiable and shall correspond to a single operating or control mode.
The selector may be replaced by another selection method which
restricts the use of certain functions of the machinery to certain
categories of operator (for example access code).

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9 Control circuits and control functions
9.2 Control functions
9.2.4 Cableless control system (CCS)
9.2.4.1 General requirements
Subclause 9.2.4 deals with the functional requirements of control
systems employing cableless (for example radio, infra-red) techniques
for transmitting control signals and data between operator control
station(s) and other parts of the control system(s).
NOTE 1 Reference to a machine in 9.2.4 is intended to be read as “machine orpart(s) of a machine”.

Transmission reliability requirements can be necessary for safetyfunctions of a CCS that rely on data transmission (for example, safetyrelated active stop, motion commands).
The CCS shall have functionality and a response time suitable for theapplication based on the risk assessment.
NOTE 2 IEC 61784-3 describes communication failures of communication
networks and requirements for safetyrelated data transmission.
NOTE 3 Further requirements for cableless control systems are underdevelopment by IEC TC 44 in draft IEC 62745.
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9 Control circuits and control functions
9.2 Control functions
9.2.4 Cableless control system (CCS)
9.2.4.2 Monitoring the ability of a cableless control system tocontrol a machine
The ability of a cableless control system (CCS) to control a machine shallbe automatically monitored, either continuously or at suitable intervals.
The status of this ability shall be clearly indicated (for example, by anindicating light, a visual display indication, etc.)
If the communication signal is degraded in a manner that might lead tothe loss of the ability of a CCS to control a machine (e.g., reduced signal
level, low battery power) a warning to the operator shall be provided
before the ability of the CCS to control a machine is lost.
When the ability of a CCS to control a machine has been lost for a timethat is determined from a risk assessment of the application, an
automatic stop of the machine shall be initiated.
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9 Control circuits and control functions
9.2 Control functions
9.2.4 Cableless control system (CCS)
9.2.4.2 Monitoring the ability of a cableless control system tocontrol a machine
NOTE In some cases, for example, in order to avoid this automatic stop
generating an unexpected hazardous condition, it can be necessary forthe machine to go to a predetermined state before stopping.
Restoration of the ability of a CCS to control a machine shall not restart
the machine. Restart shall require a deliberate action, for example
manual actuation of a start button.
9.2.4.3 Control limitation
Cableless operator control station(s) shall only control the intended
machine(s) and shall affect only the intended machine functions.

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9 Control circuits and control functions
9.2 Control functions
9.2.4 Cableless control system (CCS)
9.2.4.4 Use of multiple cableless operator control stations
When more than one cableless operator control station is used to control amachine, then:• only one cableless operator control station shall be enabled at a time
except as necessary for the operation of the machine;• transfer of control from one cableless operator control station toanother shall require a deliberate manual action at the control station thathas control;• during machine operation, transfer of control shall only be possible whenboth cableless operator control stations are set to the same mode ofmachine operation and/or function(s) of the machine;• transfer of control shall not change the selected mode of machine
operation and/or function(s) of the machine;• each cableless operator control station that has control of the machine
shall be provided with an indication that it has control (by for example,
the provision of an indicating light, a visual display indication).
NOTE Indications at other locations can be necessary as determined by the risk
assessment.
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9 Control circuits and control functions
9.2 Control functions
9.2.4 Cableless control system (CCS)
9.2.4.5 Portable cableless operator control stations
Portable cableless operator control stations shall be provided with means (forexample key operated switch, access code) to prevent unauthorized use.
Each machine under cableless control should have an indication when it isunder cableless control.
When a portable cableless operator control station can be connected to one ormore of several machines, means shall be provided on the portable cablelessoperator control station to select which machine(s) is to be connected.
Selecting a machine to be connected shall not initiate control commands.

9.2.4.6 Deliberate disabling of cableless operator control stations
Where a cableless operator control station is disabled when under control, theassociated machine shall meet the requirements for loss of ability of a CCS tocontrol a machine in 9.2.4.2.
Where it is necessary to disable a cableless operator control station without
interrupting machine operation, means shall be provided (for example on thecableless operator control station) to transfer control to another fixed or
portable control station.
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9 Control circuits and control functions
9.2 Control functions
9.2.4 Cableless control system (CCS)
9.2.4.7 Emergency stop devices on portable cableless operator control
stations
Emergency stop devices on portable cableless operator control stations shall not
be the sole means of initiating the emergency stop function of a machine.
Confusion between active and inactive emergency stop devices shall be
avoided by appropriate design and information for use. See also ISO 13850.
9.2.4.8 Emergency stop reset
Restarting of cableless control after power loss, disabling and re-enabling,
loss of communication, or failure of parts of the CCS shall not result in a reset ofan emergency stop condition.
The instructions for use shall state that the reset of an emergency stop condition
initiated by a portable cableless operator control station shall only be
performed when it can be seen that the reason for initiation has been cleared.
Depending on the risk assessment, in addition to the resetting of the emergency
stop actuator on the portable cableless operator control station, one or more
supplementary fixed reset devices should be provided.
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9 Control circuits and control functions
9.3 Protective interlocks
9.3.6 Suspension of safety functions and/or protective measures
Where it is necessary to suspend safety functions and/or protective measures(for example for setting or maintenance purposes), the control or operating mode
selector shall simultaneously:• disable all other operating (control) modes;• permit operation only by the use of a hold-to-run device or by asimilar control device positioned so as to permit sight of thehazardous elements;• permit operation of the hazardous elements only in reduced risk
conditions (e.g. reduced speed, reduced power / force, stepby-step operation, e.g. with a limited movement control
device);• prevent any operation of hazardous functions by voluntary or
involuntary action on the machine's sensors.
If these four conditions cannot be fulfilled simultaneously, the control oroperating mode selector shall activate other protective measures designed
and constructed to ensure a safe intervention zone. In addition, the operator shallbe able to control operation of the parts he is working on from the adjustment
point.
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9 Control circuits and control functions
9.4 Control functions in the event of failure
9.4.1 General requirements
Where functions performed by the electrical control system(s) havesafety implications but application of IEC 62061 leads to a required
safety integrity less than that required by SIL 1, compliance withthe requirements of this part of IEC 60204 can lead to an
adequate performance of the electrical control system(s).
9.4.2 Measures to minimize risk in the event of failure
9.4.2.1 General
Measures to minimize risk in the event of failure include but are
not limited to:• use of proven circuit techniques and components;• provisions of partial or complete redundancy;• provision of diversity;• provision for functional tests.

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9 Control circuits and control functions
9.4 Control functions in the event of failure
9.4.3 Protection against malfunction of control circuits
9.4.3.1 Insulation faults
9.4.3.1.1 General
Measures shall be provided to reduce the probability that insulation
faults on any control circuit can cause malfunction such as unintentional
starting, potentially hazardous motions, or prevent stopping of themachine.
The measures to meet the requirements include but are not limited to
the following methods:– method a) Earthed control circuits fed by transformers;– method b) Non-earthed control circuits fed by transformers;– method c) Control circuits fed by transformer with an earthedcentre-tap winding;– method d) Control circuits not fed by a transformer.

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9.4.3.1.2 Method a)

1 Switched conductors
2 Common conductors
3 Control switches
Figure 7 – Method a) Earthed control circuit fed by a transformer

NOTE Method a) can be used also for DC control circuits. In this case thetransformer shown in Figure 7 is substituted by a DC power supply unit
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9.4.3.1.3 Method b1)

1 Switched conductors
2 Common conductors
3 Control switches
Figure 8 – Method b1) Non-earthed control circuit fed by transformer
NOTE 1 Method b1) can be used also for DC control circuits. In this case thetransformer shown in Figure 8 is substituted by a DC power supply.
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9.4.3.1.4 Method c)

1 Switched conductors
2 Common conductors
3 Control switches
Figure 11 – Method c) Control circuits fed by transformer
with an earthed centre-tap winding
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9.4.3.1.5 Method d1a)

Figure 12 – Method d1a) Control circuit without transformer connected
between a phase and the neutral of an earthed supply system
NOTE 1 Figure 12 shows the case where the supply system is a TN system. The
control circuit is the same in the case of a TT system.
NOTE 2 Figure 12 does not show any protective devices for the power circuit andcontrol circuit, provisions for which are stated in 6.3 and 7.2.
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10 Operator interface and machine-mounted
control devices
10.1 General
10.1.1 General requirements
Ergonomic principles shall be taken into account in the location ofoperator interface devices.
10.2 Actuators
Actuators (see 3.1.1) shall be colour-coded as follows.

The colours for START/ON actuators should be WHITE, GREY, BLACK or
GREEN with a preference for WHITE. RED shall not be used.
The colour RED shall be used for emergency stop and emergency
switching off actuators (including supply disconnecting devices where it isforeseen that they are for use in an emergency). If a background exists
immediately around the actuator, then this background shall be coloured
YELLOW. The combination of a RED actuator with a YELLOW
background shall only be used for emergency operation devices.

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10 Operator interface and machine-mounted
control devices
10.2 Actuators
The colours for STOP/OFF actuators should be BLACK, GREY, or WHITE
with a preference for BLACK. GREEN shall not be used. RED is permitted,
but it is recommended that RED is not used near an emergency operation
device.
WHITE, GREY, or BLACK are the preferred colours for actuators thatalternately act as START/ON and STOP/OFF actuators.
The colours RED, YELLOW, or GREEN shall not be used.
WHITE, GREY, or BLACK are the preferred colours for push-button
actuators that cause operation while they are actuated and cease theoperation when they are released (for example hold-to-run). The colours
RED, YELLOW, or GREEN shall not be used.

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10 Operator interface and machine-mounted
control devices
10.2 Actuators
Reset actuators shall be BLUE, WHITE, GREY, or BLACK. Where theyalso act as a STOP/OFF actuator, the colours WHITE, GREY, or BLACK
are preferred with the main preference being for BLACK. GREEN shall not
be used.
The colour YELLOW is reserved for use in abnormal conditions, forexample, in the event of an abnormal condition of the process, or tointerrupt an automatic cycle.
Where the same colour WHITE, GREY, or BLACK is used for various
functions (for example WHITE for START/ON and for STOP/OFF
actuators) a supplementary means of coding (for example shape, position,
symbol) shall be used for the identification of actuators.

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10 Operator interface and machine-mounted
control devices
10.2 Actuators
10.2.2 Markings
In addition to the functional identification as described in 16.3,
recommended symbols to be placed near to or preferably directly on
certain actuators are given In Table 2 or 3.
Power
ON

OFF

ON/OFF(push on-push off)ON(hold-to-run)

IEC 60417-5007(2002-10)

IEC 60417-5008(2002-10)

IEC 60417-5010(2002-10)

IEC 60417-5011(2002-10)

Table 2 – Symbols for actuators (Power)
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10 Operator interface and machine-mounted
control devices
10.2 Actuators
10.2.2 Markings

Machine operation
START

STOP

HOLD-TO-RUN

EMERGENCY
STOP

IEC 60417-5104(2006-08)

IEC 60417-5110A(2004-06)

IEC 60417-5011(2002-10)

IEC 60417-5638(2002-10)

Table 3 – Symbols for actuators (Machine operation)
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11 Controlgear: location, mounting, andenclosures
11.5 Access to electrical equipment
Doors in gangways and for access to electrical operating areas shall:– be at least 0,7 m wide and 2,0 m high;– open outwards;– have a means (for example panic bolts) to allow opening from theinside without the use of a key or tool.

NOTE Further information is given in IEC 60364-7-729.
要求の簡略化

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12 Conductors and cables
Table 6 – Examples of current-carrying capacity (Iz) of PVC insulated copper conductors orcables under steady-state conditions in an ambient air temperature of +40 °C for different
methods of installation
Cross-sectional
Area
mm2
0.75
1.0
1.5
2.5
4
6
10
16
25
35
50
70
95
120

Installation method (see D.2.2)
B1

B2

C

E

Current-carrying capacity Iz for three phase circuits(A)
8.6
10.3
13.5
18.3
24
31
44
59
77
96
117
149
180
208

8.5
10.1
13.1
17.4
23
30
40
54
70
86
103
130
156
179

9.8
11.7
15.2
21
28
36
50
66
84
104
125
160
194
225

10.4
12.4
16.1
22
30
37
52
70
88
110
133
171
207
240

4.4
7.5
9.5

4.4
7.8
10

Control circuit pairs
0.20
0.5
0.75
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4.5
7.9
9.5

4.3
7.5
9.0

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Annex D (informative)
Annex D (informative)
Current-carrying capacity and overcurrent protection of conductors
and cables in the electrical equipment of machines
D.1 General
D.2.2 Methods of installation
In machines, the methods of conductor and cable installation between
enclosures andindividual items of the equipment shown in Figure D.1 are assumed to be
typical (the letters used are in accordance with IEC 60364-5-52):– Method B1: using conduits (3.1.9) and cable trunking systems(3.1.6) for holding and protecting conductors or single core cables;– Method B2: same as B1 but used for multicore cables;– Method C: multicore cables installed in free air, horizontal or verticalwithout gap between cables on walls;– Method E: multicore cables in free air, horizontal or vertical laid on
open cable trays (3.1.5).
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Annex D (informative)a) Conductors/single core cables in
conduit and cable trunking systemsc) Cables on wallsb) Cables in conduit andcable trunking systemsd) Cables on open cable trays

Figure D.1 – Methods of conductor and cable installation
I
independent of number of conductors/cables
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13 Wiring practices
13.1 Connections and routing
13.1.4 AC circuits – Electromagnetic effects (prevention of eddy
currents)
Conductors of AC circuits installed in ferromagnetic enclosures shallbe arranged so that all conductors of each circuit, including theprotective conductor of each circuit, are contained in the sameenclosure. Where such conductors enter a ferrous enclosure, theyshall be arranged such that the conductors are not individuallysurrounded by ferromagnetic material.
Single-core cables armoured with steel wire or steel tape should not
be used for AC circuits.
NOTE 1 The steel wire or steel tape armour of a single-core cable isregarded as a ferromagnetic enclosure. For single-core wirearmoured cables, the use of aluminium armour is recommended.
NOTE 2 Derived from IEC 60364-5-52.
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13 Wiring practices
13.2 Identification of conductors
13.2.1 General requirements
NOTE 2 IEC 62491 provides rules and guidelines for the labelling ofcables and cores/conductors used in industrial installations, equipment
and products.
13.2.2 Identification of the protective conductor / protective bonding
conductor
Where the protective conductor(s) can be easily identified by its shape,
position, or construction (for example a braided conductor, uninsulated
stranded conductor), or where the insulated conductor is not readily
accessible or is part of a multicore cable, colour coding throughout its
length is not necessary. However, where the conductor is not clearlyvisible throughout its length, the ends or accessible locations shall beclearly identified by the graphical symbol IEC 60417-5019:2006-08 (seeFigure 16) or with the letters PE or by the bicolour combination GREENAND-YELLOW.

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13 Wiring practices
13.2 Identification of conductors
13.2.1 General requirements
NOTE 2 IEC 62491 provides rules and guidelines for the labelling ofcables and cores/conductors used in industrial installations, equipment
and products.
13.2.2 Identification of the protective conductor / protective bonding
conductor

Figure 16 – Symbol IEC 60417-5019

Exception: Protective bonding conductors may be marked with the letters
PB and/or the symbol IEC 60417-5021 (2002-10) (see Figure 17).

Figure 17 – Symbol IEC 60417-5021
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15 Socket-outlets and lighting
15.1 Socket-outlets for accessories– where fault protection is provided by automatic disconnection of
supply, the disconnection time shall be in accordance withTable
A.1 for TN systems or Table A.2 for TT systems;– circuits supplying socket-outlets with a current rating notexceeding 20 A shall be provided with residual current protection(RCDs) with a rated operating current not exceeding 30 mA.
15.2 Local lighting of the machine and of the equipment
15.2.2 Supply– power supply units, for DC supply to LED light sources, fitted withisolating transformers (for example, in accordance withIEC 61558-2-6).

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16 Marking, warning signs and reference
designations
16.2 Warning signs
16.2.1 Electric shock hazard
Enclosures that do not otherwise clearly show that they containelectrical equipment that can give rise to a risk of electric shock shallbe marked with the graphical symbol ISO 7010-W012 (see Figure 18).

Figure 18 – Symbol ISO 7010-W012

16.2.2 Hot surfaces hazard
Where the risk assessment shows the need to warn against thepossibility of hazardous surface temperatures of the electricalequipment the graphical symbol ISO 7010-W017 shall be used (seeFigure 19).

Figure 19 – Symbol ISO 7010-W017
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17 Technical documentation
17.1 General
The information necessary for identification, transport, installation,
operation, and use, maintenance, decommissioning and disposal of theelectrical equipment of a machine shall be supplied
NOTE 1 Documentation is sometimes supplied in paper form, since itcannot be assumed that the user has access to the means of reading
instructions supplied in electronic form or made available on an Internet
site. However, it is often useful for the documentation to be madeavailable in electronic form and on the Internet as well as in paper form,
since this enables the user to download the electronic file if he so wishes
and to recover the documentation if the paper copy has been lost. This
practice also facilitates the updating of the documentation when this isnecessary.

Annex I should be considered as guidance for the preparation of
information and documents
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Annex I ( informative)
Annex I (informative)
Documentation / Information
A list of available standards applicable to documentation andinformation is provided in Table I.1.
Brief definitions of a set of internationally standardized documentkinds are given in the publicly available database IEC 61355 DB(http://std.iec.ch/iec61355).
Table I.1 – Documentation / Information that can be applicable
Type of information for the electricalequipment
Structuring principles

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Recommended standard
IEC 81346-1: Industrial systems, installations
and equipment and industrial products –Structuring principles and reference
designations – Part 1: Basic rules

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17 Technical documentation
17.2 Information related to the electrical equipment
The following shall be supplied:a) where more than one document is provided, a main document for theelectrical equipment as a whole, listing the complementary documents
associated with the electrical equipment;b) identification of the electrical equipment (see 16.4);c) information on installation and mounting including:• a description of the electrical equipment’s installation and mounting,and its connection to the electrical supplies and where relevant othersupplies;• short-circuit current rating of the electrical equipment for each
incoming power supply;• rated voltage, number of phases and frequency (if AC.), type of
distribution system (TT, TN, IT) and full-load current for each
incoming supply;
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17 Technical documentation
17.2 Information related to the electrical equipment
The following shall be supplied:c) information on installation and mounting including:• any additional electrical supply(ies) requirements (for example
maximum supply source impedance, leakage current) for each
incoming supply;• space required for the removal or servicing of the electricalequipment;• installation requirements where needed to ensure that thearrangements for cooling are not impaired;• environmental limitations (for example lighting, vibration, EMC
environment, atmospheric contaminants) where appropriate;• functional limitations (for example peak starting currents andpermitted voltage drop(s)) as applicable;• precautions to be taken for the installation of the electrical equipment
relevant to the electromagnetic compatibility;
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17 Technical documentation
17.2 Information related to the electrical equipment
The following shall be supplied:d) an instruction for the connection of simultaneously accessible
extraneous-conductive parts in the vicinity of the machine (for example,
within 2,5 metres) such as the following to the protective bonding circuit: •metallic pipes;• fences;• ladders;• handrails.
e) information on the functioning and operation, including as applicable:• an overview of the structure of the electrical equipment (for example
by structure diagram or overview diagram);• procedures for programming or configuring, as necessary for theintended use;
• procedures for restarting after an unexpected stop;• a sequence of operation;
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17 Technical documentation
17.2 Information related to the electrical equipment
The following shall be supplied:f) information on maintenance of the electrical equipment, as appropriate,including:• frequency and method of functional testing;• instructions on the procedures for safe maintenance and where it isnecessary to suspend a safety function and/or protective measure(see 9.3.6);• guidance on the adjustment, repair, and frequency and method of
preventive maintenance;• details of the interconnections of the electrical components subject toreplacement (for example by circuit diagrams and/or connection
tables);• information on required special devices or tools;• information on spare parts;• information on possible residual risks, indication of whether any
particular training is required and specification of any necessary
personal protective equipment;
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17 Technical documentation
17.2 Information related to the electrical equipment
The following shall be supplied:f) information on maintenance of the electrical equipment, as appropriate,including:• where applicable, instructions to restrict availability of key(s) or tool(s)to skilled or instructed persons only;• settings (DIP-switches, programmable parameter values, etc);• information for validation of safety related control functions after
repair or modification, and for periodic testing where necessary;g) information on handling, transportation and storage as appropriate (forexample dimensions, weight, environmental conditions, possible ageing
constraints);h) information for proper disassembly and handling of components (forexample for recycling or disposal).

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18 Verification
18.1 General
The extent of verification will be given in the dedicated product standard
for a particular machine. Where there is no dedicated product standard forthe machine, the verifications shall always include the items a), b), c) andh) and may include one or more of the items d) to g):a) verification that the electrical equipment complies with its technicaldocumentation;b) verification of continuity of the protective bonding circuit (Test 1 of
18.2.2);c) in case of fault protection by automatic disconnection of supply,
conditions for protection by automatic disconnection shall beverified according to 18.2;d) insulation resistance test (see 18.3);e) voltage test (see 18.4);f) protection against residual voltage (see 18.5);g) verification that the relevant requirements of 8.2.6 are met;h) functional tests (see 18.6).
For verifications that include measurement, measuring equipment inaccordance with the IEC 61557 series is recommended.
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18 Verification
18.2 Verification of conditions for protection by automatic
disconnection of supply
18.2.1 General
The conditions for automatic disconnection of supply (see 6.3.3) shall beverified by tests.
Test 1 verifies the continuity of the protective bonding circuit.
Test 2 verifies the conditions for protection by automatic disconnection of
the supply in TN systems.
For TN-systems, those test methods are described in 18.2.2 and 18.2.3;
their application for different conditions of supply are specified in 18.2.4.
For TT systems, see Clause A.2.
For IT systems, see IEC 60364-6.
Where RCDs are used in the electrical equipment, their function shall beverified in accordance with the manufacturer’s instructions. The test
procedure and test interval shall be specified in the maintenanceinstructions.
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Annex A (normative)
Annex A (normative)
Fault protection by automatic disconnection of supply
A.1 Fault protection for machines supplied from TN-systems
A.1.1 General
The provisions in the Annex A are derived from IEC 60364-4-41:2005, andIEC 60364-6:2006.

A.2 Fault protection for machines supplied from TT-systems
A.2.1 Connection to earth
A.2.2 Fault protection for TT systems
A.2.2.1 General
A.2.2.2 Protection by residual current protective device (RCD)
A.2.2.3 Protection by overcurrent protective devices
A.2.3 Verification of protection by automatic disconnection of supply
using a residual current protective device
A.2.4 Measurement of the fault loop impedance (Zs)
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Annex B (informative)
Annex B (informative)
Enquiry form for the electrical equipment of machines
The use of this enquiry form can facilitate an exchange of information
between the user and supplier on basic conditions and additional user
requirements to enable suitable design, application and utilization of theelectrical equipment of the machine (see 4.1) particularly when theconditions on site can deviate from those generally expected.
Annex B can also serve as an internal checklist for serial manufactured
machines.

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