EN 60204-11:2000

SLOVENSKI STANDARD
01-september-2001
Safety of machinery - Electrical equipment of machines - Part 11: Requirements for
HV equipment for voltages above 1000 V a.c. or 1500 V d.c. and not exceeding 36
kV (IEC 60204-11:2000)
Safety of machinery - Electrical equipment of machines -- Part 11: Requirements for HV
equipment for voltages above 1 000 V a.c. or 1 500 V d.c. and not exceeding 36 kV
Sicherheit von Maschinen - Elektrische Ausrüstung von Maschinen -- Teil 11:
Anforderungen an Hochspannungsausrüstung für Spannungen über 1000 V
Wechselspannung oder 1500 V Gleichspannung aber nicht über 36 kV
Sécurité des machines - Equipement électrique des machines -- Partie 11: Prescriptions
pour les équipements HT fonctionnant à des tensions supérieures à 1 000 V c.a. ou 1
500 V c.c. et ne dépassant pas 36 kV
Ta slovenski standard je istoveten z: EN 60204-11:2000
ICS:
13.110 Varnost strojev Safety of machinery
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 60204-11
NORME EUROPÉENNE
EUROPÄISCHE NORM November 2000

ICS 13.110;29.020
Incorporates corrigendum February 2010

English version
Safety of machinery - Electrical equipment of machines
Part 11: Requirements for HV equipment for voltages
above 1 000 V a.c. or 1 500 V d.c. and not exceeding 36 kV
(IEC 60204-11:2000)
Sécurité des machines -  Sicherheit von Maschinen -
Equipement électrique des machines Elektrische Ausrüstung von Maschinen
Partie 11: Prescription pour les Teil 11: Anforderungen an
équipements HT fonctionnant à des Hochspannungsausrüstung für
tensions supérieures à 1 000 V c.a. ou Spannungen über 1000 V
1 500 V c.c. et ne dépassant pas 36 kV Wechselspannung oder 1500 V
(CEI 60204-11:2000) Gleichspannung aber nicht über 36 kV
(IEC 60204-11:2000)
This European Standard was approved by CENELEC on 2000-09-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,
Portugal, Spain, Sweden, Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2000 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60204-11:2000 E
Page 2
Foreword
The text of document 44/283/FDIS, future edition 1 of IEC 60204-11, prepared by IEC TC 44, Safety of
machinery - Electrotechnical aspects, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 60204-11 on 2000-09-01.
This European Standard is to be used in conjunction with EN 60204-1.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2001-06-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2003-09-01
Annexes designated "normative" are part of the body of the standard.
Annexes designated "informative" are given for information only.
In this standard, annex ZA is normative and annexes A, B, C, D and E are informative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60204-11:2000 was approved by CENELEC as a European Standard
without any modification.
__________
The contents of the corrigendum of February 2010 have been included in this copy.

Page 3
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this European Standard only when incorporated in it by amendment or revision. For undated
references the latest edition of the publication referred to applies (including amendments).
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
IEC 60034-1 1996 Rotating electrical machines EN 60034-1 1998
(mod) Part 1: Rating and performance + corr. February 2000

IEC 60050-191 1990 International Electrotechnical Vocabulary - -
(IEV)
Chapter 191: Dependability and quality of
service
IEC 60050-195 1998 Chapter 195: Earthing and protection against - -
electric shock
IEC 60050-441 1984 Chapter 441: Switchgear, controlgear and - -
fuses
IEC 60050-826 1982 Chapter 826: Electrical installations of
buildings
1)
+ A2 1995  HD 384.2 S2 2000
IEC 60071-1 1993 Insulation co-ordination EN 60071-1 1995
Part 1: Definitions, principles and rules

IEC 60071-2 1996 Part 2: Application guide EN 60071-2 1997

2)
IEC 60076-5 1976 Power transformers HD 398.5 S1 1983
(mod) Part 5: Ability to withstand short-circuit

IEC 60129 1984 Alternating current disconnectors and EN 60129 1994
earthing switches
IEC 60204-1 1997 Safety of machinery - Electrical equipment of EN 60204-1 1997
machines + corr. September 1998
Part 1: General requirements
3)
IEC 60298 1990 A.C. metal-enclosed switchgear and EN 60298 1996
controlgear for rated voltages above 1 kV + A11 1999
and up to and including 52 kV
1)
HD 384.2 S2 includes A1:1990 + A2:1995 + A3:1999 to IEC 60050:826.
2)
HD 398.5 S1 is superseded by EN 60076-5:2000 which is based on IEC 60076-5:2000.
3)
EN 60298 includes corrigendum April 1995 and A1:1994 to IEC 60298.

Page 4
Publication Year Title EN/HD Year
IEC 60364-4-41 1992 Electrical installations of buildings HD 384.4.41 S2 1996
(mod) Part 4: Protection for safety
Chapter 41: Protection against electric shock

IEC 60364-4-42 1980 Part 4: Protection for safety HD 384.4.42 S1 1985
(mod) Chapter 42: Protection against thermal + A1 1992
effects + A2 1994
IEC 60364-5-54 1980 Part 5: Selection and erection of electrical HD 384.5.54 S1 1988
(mod) equipment -- Chapter 54: Earthing
arrangements and protective conductors

IEC 60417 Series Graphical symbols for use on equipment EN 60417 Series

IEC 60420 1990 High-voltage alternating current switch-fuse EN 60420 1993
combinations
IEC 60445 1999 Basic and safety principles for man-machine EN 60445 2000
interface, marking and identification -
Identification of equipment terminals and of
terminations of certain designated
conductors, including general rules for an
alphanumeric system
IEC 60466 1987 A.C. insulation-enclosed switchgear and - -
controlgear for rated voltages above 1 kV
and up to and including 38 kV
IEC 60529 1989 Degrees of protection provided by enclosures EN 60529 1991
(IP Code) + corr. May 1993
IEC 60621-3 1979 Electrical installations for outdoor sites under - -
heavy conditions (including open- cast mines
and quarries)
IEC 60694 1996 Common specifications for high-voltage EN 60694 1996
switchgear and controlgear standards + corr. May 1999

IEC 60865-1 1993 Short-circuit currents - Calculation of effects EN 60865-1 1993
Part 1: Definitions and calculation methods

IEC 61230 (mod) 1993 Live working - Portable equipment for EN 61230 1995
earthing or earthing and short-circuiting + A11 1999

IEC 61243-1 1993 Live working - Voltage detectors EN 61243-1 1997
(mod) Part 1: Capacitive type to be used for + corr. June 1999
voltages exceeding 1 kV a.c. and up to 52 kV

IEC 61310-1 1995 Safety of machinery - Indication, marking and EN 61310-1 1995
actuation
Part 1: Requirements for visual, auditory and
tactile signals
IEC 61310-3 1999 Part 3: Requirements for the location and EN 61310-3 1999
operation of actuators
ISO 3864 1984 Safety colours and safety signs - -

Page 5
Publication Year Title EN/HD Year
ISO/TR 12100-1 1992 Safety of machinery - Basic concepts, - -
general principles for design
Part 1: Basic terminology, methodology

EN 50178 1997 Electronic equipment for use in power - -
installations
HD 637 S1 1999 Power installations exceeding 1 kV a.c. - -

Page 6
Annex ZZ
(informative)
Coverage of Essential Requirements of EC Directives
This European Standard has been prepared under a mandate given to CENELEC by the
European Commission and the European Free Trade Association and within its scope the
standard covers only the following essential requirements out of those given in annex I of the
EC Directive 2006/42/EC:
− 1.2.1
− 1.2.2
− 1.2.3
− 1.2.4.1
− 1.2.4.3
− 1.2.4.4
− 1.2.6
− 1.5.1
− 1.6.3 (for isolation of electrical supplies of machinery)
− 1.6.4 (for access to electrical equipment)
− 1.7.1.1
− 1.7.1.2
− 1.7.2 (for residual risks of an electrical nature)
− 1.7.4(c)
− 1.7.4.2(e)
Compliance with this standard provides one means of conformity with the specified essential
requirements of the Directive concerned.

WARNING: Other requirements and other EC Directives may be applicable to the products
falling within the scope of this standard.

NORME CEI
INTERNATIONALE IEC
60204-11
INTERNATIONAL
Première édition
STANDARD
First edition
2000-07
Sécurité des machines –
Equipement électrique des machines –
Partie 11:
Prescriptions pour les équipements HT fonctionnant
à des tensions supérieures à 1 000 V c.a.
ou 1 500 V c.c. et ne dépassant pas 36 kV
Safety of machinery –
Electrical equipment of machines –
Part 11:
Requirements for HV equipment for voltages above
1 000 V a.c. or 1 500 V d.c. and not exceeding 36 kV
 IEC 2000 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun procédé, any form or by any means, electronic or mechanical,
électronique ou mécanique, y compris la photocopie et les including photocopying and microfilm, without permission in
microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
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Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
XA
PRICE CODE
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue

60204-11 © IEC:2000 – 3 –
CONTENTS
Page
FOREWORD . 9
INTRODUCTION . 13
Clause
1 Scope . 17
2 Normative references. 19
3 Definitions. 21
4 General requirements . 33
4.1 General considerations . 33
4.2 Selection of electrical equipment . 35
4.3 Electrical supply. 35
4.4 Physical environment and operating conditions. 37
4.5 Transportation and storage . 37
4.6 Provisions for handling . 37
4.7 Installation . 37
5 Incoming supply conductor terminations, devices for disconnecting and switching off,
and means for earthing . 37
5.1 Incoming supply conductor terminations . 37
5.2 Supply disconnecting (isolating) devices and means for earthing . 37
5.3 Devices for switching off for prevention of unexpected start-up . 41
5.4 Devices for disconnecting and means for earthing HV equipment . 43
5.5 Protection against unauthorized, inadvertent and/or mistaken operation . 43
6 Protection against electric shock. 43
6.1 General. 43
6.2 Protection against direct contact . 45
6.3 Protection against indirect contact . 45
7 Protection of HV equipment . 49
7.1 General. 49
7.2 Overcurrent protection . 49
7.3 Earth fault protection . 51
7.4 Protection against overvoltages due to lightning and to switching surges. 53
7.5 Protection against other abnormal conditions. 53
8 Equipotential bonding . 53
8.1 General. 53
8.2 Protective bonding circuit. 57
9 Control circuits and control functions . 61
10 Operator interface and machine-mounted control devices . 63
11 Electronic equipment . 63
12 Controlgear: location, mounting, and enclosures. 63
12.1 General requirements . 63
12.2 Location and mounting. 63
12.3 Degrees of protection . 65
12.4 Enclosures, doors and openings . 67
12.5 Access to HV equipment . 67

60204-11 © IEC:2000 – 5 –
Clause Page
13 Conductors and cables . 69
13.1 General requirements . 69
13.2 Conductors . 69
13.3 Insulation and sheath materials . 69
13.4 Current-carrying capacity in normal service . 71
13.5 Conductor and cable voltage drop. 71
13.6 Minimum cross-sectional area. 71
13.7 Flexible cables. 71
13.8 Conductor wires, conductor bars and slip-ring assemblies . 75
14 Wiring practices . 77
14.1 Connections and routing . 77
14.2 Identification of conductors . 79
14.3 Flexible cables. 79
14.4 Plug/socket combinations . 81
14.5 Dismantling for shipment . 81
14.6 Cable trays . 81
15 Electric motors and associated equipment . 83
15.1 General. 83
15.2 Motor connection boxes . 83
16 Accessories .83
16.1 Accessories for earthing and short-circuiting live parts. 83
16.2 Voltage detectors. 83
16.3 Accessories for safe working . 83
17 Marking, warning signs and reference designations . 83
17.1 General. 83
17.2 Warning signs. 85
18 Technical documentation . 85
19 Testing and verification. 85
19.1 General. 85
19.2 Earthing system tests . 87
19.3 Insulation resistance tests . 87
19.4 Voltage tests. 87
19.5 Functional tests . 87
19.6 IP tests for HV equipment outside electrical operating areas. 87
19.7 Retesting . 87
Annex A (informative) Examples of machines covered by this part of IEC 60204 . 89
Annex B (informative) Inquiry form for the HV equipment of machines. 91
Annex C (informative) Method of calculation for the cross-sectional area of
bare protective conductors in supply systems with direct earthing or low impedance
earthing of the neutral . 99
Annex D (informative) Relationship between cable rated voltages and highest voltage
for HV equipment . 101
Annex E (informative) Rationalization of the use of terms relating to earthing and
protective bonding. 103
Index. 109

60204-11 © IEC:2000 – 7 –
Page
Figure 1 – Block diagram of a machine containing HV equipment . 15
Figure 2 – Example of the equipotential bonding (see 3.15) for electrical equipment
of a machine . 55
Figure E.1 – Explanation of the terms relating to earthing and protective bonding . 107
Table 1 – Cross-sectional area of bare protective conductors. 59
Table 2 – Maximum allowable conductor temperatures under normal and short-circuit
conditions. 69
Table 3 – Derating factors for cables wound on drums . 73

60204-11 © IEC:2000 – 9 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY OF MACHINERY –
ELECTRICAL EQUIPMENT OF MACHINES –
Part 11: Requirements for HV equipment for voltages
above 1 000 V a.c. or 1 500 V d.c. and not exceeding 36 kV
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International
Organization for Standardization (ISO) in accordance with conditions determined by agreement between the
two organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60204-11 has been prepared by IEC technical committee 44:
Safety of machinery – Electrotechnical aspects.
This standard shall be used in conjunction with IEC 60204-1.
The text of this standard is based on the following documents:
FDIS Report on voting
44/283/FDIS 44/286/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.
Annexes A, B, C, D and E are for information only.

60204-11 © IEC:2000 – 11 –
The following differences exist in some countries:
– 6.2: Protection by obstacles and placing out of reach is not applicable (Finland).
The committee has decided that the contents of this publication will remain unchanged
until 2005. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
60204-11 © IEC:2000 – 13 –
INTRODUCTION
This part of IEC 60204 provides requirements and recommendations relating to the high
voltage electrical equipment (HV equipment) of machines together with its associated low
voltage electrical equipment (LV equipment) so as to promote
– safety of persons and property;
– consistency of control response;
– ease of maintenance.
High performance is not to be obtained at the expense of the essential factors mentioned
above.
An example of a possible application of these requirements is a machine or group of
machines used for the processing of a material where a failure in such machinery can have
serious economic consequences.
Figure 1 is a block diagram of a machine and associated equipment showing the various
elements of the electrical equipment addressed in this standard. Numbers in parentheses
refer to clauses and subclauses in this standard. It is understood that all of the elements
taken together including the safeguards, software and the documentation constitute the
machine or group of machines working together with usually at least one level of supervisory
control.
More guidance on the use of this standard is given in annex F of IEC 60204-1.

60204-11 © IEC:2000 – 15 –
Warning signs, item designation
Physical
Supervisory
(clause 17)
environment
controller
Technical documentation
(4.4)
(clause 18)
Supply disconnecting devices
See HD 637
and means for earthing
(5.2)
Prevention of unexpected start-up
(5.3)
Protection against electrical shock
Power supply
(5.4 and clause 6)
(4.3)
Protection of equipment
Data link
(clause 7)
Equipotential bonding
(clause 8)
Protective bonding circuit
(8.2)
Control circuits and control functions
(clause 9)
Controlgear
External installation
(clause 12)
earthing systems
(clause 8)
Accessories
(clause 16)
Conductors and
cables
(clause 13)
Wiring
practices
(clause 14)
Programmable Operator
Motor
Testing
controller station
control equipment
(clause 19) (clause 11) (clause 10)
Input/output Safeguards and
interface
warning devices
Motors
Actuators and
(clause 15)
sensors
Processing equipment
IEC  1082/2000
Figure 1 – Block diagram of a machine containing HV equipment

60204-11 © IEC:2000 – 17 –
SAFETY OF MACHINERY –
ELECTRICAL EQUIPMENT OF MACHINES –
Part 11: Requirements for HV equipment for voltages
above 1 000 V a.c. or 1 500 V d.c. and not exceeding 36 kV
1 Scope
IEC 60204 applies to the electrical and electronic equipment and systems of machines,
including a group of machines working together in a coordinated manner, but excluding higher
level system aspects (i.e. communications between systems).
This part of IEC 60204 is applicable to equipment, or parts of equipment, which operate with
nominal supply voltages above 1 000 V a.c. or 1 500 V d.c. and not exceeding 36 kV a.c. or
d.c. with nominal frequencies not exceeding 200 Hz. For higher voltages or frequencies,
special requirements may be needed.
In this standard, the term HV equipment also covers the LV equipment forming an integral
part of the equipment operating at high voltage. The requirements in this standard primarily
cover the parts operating at high voltage except where explicitly stated otherwise. Reference
is made to IEC 60204-1 for those requirements which also apply to HV equipment.
NOTE 1 Other LV equipment not forming part of the HV equipment and defined as operating at voltages not
exceeding 1 000 V a.c. or 1 500 V d.c. are covered by IEC 60204-1.
NOTE 2 In this standard, the term "electrical" includes both electrical and electronic matters (i.e. electrical
equipment means both the electrical and the electronic equipment).
The electrical equipment covered by this part of IEC 60204 commences at the point of
connection of the supply to the electrical equipment of the machine (see 5.1).
NOTE 3 For the requirements for power supply installations, see HD 637.
This part of IEC 60204 is an application standard and is not intended to limit or inhibit
technological advancement. It does not cover all the requirements (e.g. guarding, interlocking
or control) which are needed or required by other standards or regulations in order to
safeguard personnel from hazards other than electrical hazards. Each type of machine has
unique requirements to be accommodated to provide adequate safety.
NOTE 4 In the context of this standard, the term "person" refers to any individual; "personnel" are those persons
who are assigned and instructed by the user or his agent(s) in the use and care of the machine in question.
This part of IEC 60204 specifically includes, but is not limited to, machines as defined in 3.26
(annex A lists examples of machines whose electrical equipment may be covered by this
standard).
60204-11 © IEC:2000 – 19 –
Additional and special requirements can apply to the electrical equipment of machines that
– are used in the open air (i.e. outside buildings or other protective structures);
– use, process or produce potentially explosive material (e.g. paint or sawdust);
– are used in potentially explosive and/or flammable atmospheres;
– have special risks when producing or using certain materials;
– are used in mines.
Power circuits where electrical energy is directly used as a working tool are excluded from
this part of IEC 60204.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 60204. For dated references, subsequent amend-
ments to, or revisions of, any of these publications do not apply. However, parties to
agreements based on this part of IEC 60204 are encouraged to investigate the possibility of
applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of ISO
and IEC maintain registers of currently valid International Standards.
IEC 60034-1:1996, Rotating electrical machines – Part 1: Rating and performance
IEC 60050(191):1990, International Electrotechnical Vocabulary (IEV) – Chapter 191:
Dependability and quality of service
IEC 60050-195:1998, International Electrotechnical Vocabulary (IEV) – Part 195: Earthing
and protection against electric shock
IEC 60050(441):1984, International Electrotechnical Vocabulary (IEV) – Chapter 441: Switch-
gear, controlgear and fuses
IEC 60050(826):1982, International Electrotechnical Vocabulary (IEV) – Chapter 826:
Electrical installations of buildings
IEC 60050(826):1995, amendment No. 2
IEC 60071-1:1993, Insulation co-ordination – Part 1: Definitions, principles and rules
IEC 60071-2:1996, Insulation co-ordination – Part 2: Application guide
IEC 60076-5:1976, Power transformers – Part 5: Ability to withstand short-circuit
IEC 60129:1984, Alternating current disconnectors and earthing switches
IEC 60204-1:1997, Safety of machinery – Electrical equipment of machines – Part 1: General
requirements
IEC 60298:1990, A.C. metal-enclosed switchgear and controlgear for rated voltages above
1 kV and up to and including 52 kV
IEC 60364-4-41:1992, Electrical installations of buildings – Part 4: Protection for safety –
Chapter 41: Protection against electric shock
IEC 60364-4-42:1980, Electrical installations of buildings – Part 4: Protection for safety –
Chapter 42: Protection against thermal effects

60204-11 © IEC:2000 – 21 –
IEC 60364-5-54:1980, Electrical installations of buildings – Part 5: Selection and erection of
electrical equipment – Chapter 54: Earthing arrangements and protective conductors
IEC 60417 (all parts), Graphical symbols for use on equipment
IEC 60420:1990, High-voltage alternating current switch-fuse combinations
IEC 60445:1999, Basic and safety principles for man-machine interface, marking and
identification – Identification of equipment terminals and of terminations of certain designated
conductors, including general rules for an alphanumeric system
IEC 60466:1987, A.C. insulation-enclosed switchgear and controlgear for rated voltages
above 1 kV and up to and including 38 kV
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
IEC 60621-3:1979, Electrical installations for outdoor sites under heavy conditions (including
open-cast mines and quarries) – Part 3: General requirements for equipment and ancillaries
IEC 60694:1996, Common specifications for high-voltage switchgear and controlgear
standards
IEC 60865-1:1993, Short-circuit currents – Calculation of effects – Part 1: Definitions and
calculation methods
IEC 61230:1993, Live working – Portable equipment for earthing or earthing and short-
circuiting
IEC 61243-1:1993, Live working – Voltage detectors – Part 1: Capacitive type to be used for
voltages exceeding 1 kV a.c.
IEC 61310-1:1995, Safety of machinery – Indication, marking and actuation – Part 1:
Requirements for visual, auditory and tactile signals
IEC 61310-3:1999, Safety of machinery – Indication, marking and actuation – Part 3:
Requirements for the location and operation of actuators
ISO 3864:1984, Safety colours and safety signs
ISO/TR 12100-1:1992, Safety of machinery – Basic concepts, general principles for design –
Part 1: Basic terminology, methodology
EN 50178:1997, Electronic equipment for use in power stations
HD 637:1999, Power installations exceeding 1 kV a.c.
3 Definitions
NOTE The index lists, in alphabetical order, the terms defined in this clause and indicates where they are used in
the text of this part of IEC 60204.
For the purpose of this part of IEC 60204, the following definitions apply:
3.1
ambient temperature
temperature of the air or other medium where the equipment is to be used
[IEV 826-01-04]
60204-11 © IEC:2000 – 23 –
3.2
barrier
part providing protection against direct contact from any usual direction of access
[IEV 826-03-13]
3.3
cable tray
cable support consisting of a continuous base and raised edges and no covering
NOTE A cable tray may be perforated or non-perforated.
[IEV 826-06-07, amendment 2]
3.4
control circuit (of a machine)
circuit used for the operational control of the machine and for protection of the power circuits
3.5
control device
device connected into the control circuit and used for controlling the operation of the machine
(e.g. position sensor, manual control switch, relay, magnetically operated valve)
3.6
controlgear
general term covering switching devices and their combination with associated control,
measuring, protective, and regulating equipment, also assemblies of such devices and
equipment with associated interconnections, accessories, enclosures, and supporting
structures, intended in principle for the control of electrical energy consuming equipment
[IEV 441-11-03]
3.7
direct contact
electric contact of persons or animals with live parts
[IEV 195-06-03]
3.8
duct
enclosed channel designed expressly for holding and protecting electrical conductors, cables,
and busbars
NOTE Conduits, cable trunking systems and underfloor channels are types of duct.
3.9
earthing system
locally limited system of conductively connected earth electrodes or metal parts of equal
effectiveness (for example tower footings, armourings, metal cable sheaths), of earthing
conductors and of bonding conductors
[HD 637, 2.7.6]
60204-11 © IEC:2000 – 25 –
3.10
electrical operating area
room or location for electrical equipment to which access is intended to be restricted to skilled
or instructed persons, by the opening of a door or the removal of a barrier without the use of a
key or tool, and which is clearly marked by appropriate warning signs
NOTE : A person adequately advised or supervised by an electrically skilled
(electrically) instructed person
person to enable him or her to perceive risks and to avoid hazards which electricity can create [IEV 826-09-02,
modified]
(electrically) skilled person: A person with relevant education and experience to enable him or her to perceive
risks and to avoid hazards which electricity can create [IEV 826-09-01, modified]
[see also IEC 60204-1, 3.28 and 3.52]
3.11
electronic equipment
part of the electrical equipment containing circuitry mainly based on electronic devices and
components
3.12
enclosed electrical operating area
room or location for electrical equipment to which access is intended to be restricted to skilled
or instructed persons by the opening of a door or the removal of a barrier by the use of a key
or tool and which is clearly marked by appropriate warning signs
NOTE See also NOTE to definition 3.10.
3.13
enclosure
part providing protection of equipment against certain external influences and, in any
direction, protection against direct contact [IEV 826-03-12]
NOTE  The definition taken from the existing IEV needs the following explanations under the scope of this
standard (see IEC 60529, 3.1):
a) enclosures provide protection of persons or livestock against access to hazardous parts;
b) barriers, shaped openings, or any other means suitable to prevent or limit the penetration of the specified test
probes, whether attached to the enclosure or formed by the enclosed equipment, are considered as part of the
enclosure, except where they can be removed without the use of a key or tool.
An enclosure may be
– a cabinet or box, either mounted on the machine or separate from the machine;
– a compartment consisting of an enclosed space within the machine structure.
3.14
equipment
general term including material, fittings, devices, appliances, fixtures, apparatus, and the like
used as part of, or in connection with, an electrical installation
3.15
equipotential bonding
provision of electric connections between conductive parts, intended to achieve
equipotentiality
[IEV 195-01-10]
60204-11 © IEC:2000 – 27 –
3.16
equipotential bonding conductor
(protective bonding conductor)
protective conductor provided for protective-equipotential-bonding
[IEV 195-02-10]
3.17
exposed-conductive-part
conductive part of equipment which can be touched and which is not normally live, but which
can become live when basic insulation fails
[IEV 195-06-10]
3.18
extraneous-conductive-part
conductive part not forming part of the electrical installation and liable to introduce an electric
potential, generally the electric potential of a local earth
[IEV 195-06-11]
3.19
failure
termination of the ability of an item to perform a required function
NOTE 1 After failure the item has a fault.
NOTE 2 "Failure" is an event, as distinguished from "fault", which is a state.
NOTE 3 This concept as defined does not apply to items consisting of software only.
[IEV 191-04-01]
NOTE 4 In practice the terms fault and failure are often used synonymously.
3.20
fault
state of an item characterized by inability to perform a required function, excluding the
inability during preventive maintenance or other planned actions, or due to lack of external
resources
NOTE 1 A fault is often the result of a failure of the item itself, but may exist without prior failure.
NOTE 2 In English the term "fault" and its definition are identical with those given in IEV 191-05-01. In the field of
machinery, the French term "défaut" and the German term "Fehler" are used rather than the terms "panne“ and
"Fehlzustand" that appear with this definition.
3.21
hazard
source of possible injury or damage to health
[ISO/TR 12100-1, 3.5, modified]
3.22
indirect contact
electric contact of persons or animals with exposed-conductive-parts which have become live
under fault conditions
[IEV 195-06-04]
3.23
interlock (for safeguarding)
arrangement that interconnects guard(s) or device(s) with the control system and/or all or part
of the electrical energy distributed to the machine

60204-11 © IEC:2000 – 29 –
3.24
live part
conductor or conductive part intended to be energized in normal operation, including a neutral
conductor, but by convention not a PEN conductor or PEM conductor or PEL conductor
NOTE This concept does not necessarily imply a risk of electric shock.
[IEV 195-02-19]
3.25
machine bonding conductor
conductor connecting the machine equipotential bonding to the earthing system
NOTE This is an earthing conductor as defined in IEV 826-04-07 and used in HD 637.
3.26
machinery
(machine)
a) assembly of linked parts or components, at least one of which moves, with the appropriate
machine actuators, control and power circuits, etc., joined together for a specific appli-
cation, in particular for the processing, treatment, moving or packaging of a material
b) assembly of machines which, in order to achieve one and the same end, are arranged and
controlled so that they function as an integral whole
c) interchangeable equipment modifying the function of a machine, which is placed on the
market (supplied) for the purpose of being assembled with a machine or a series of
different machines or with a tractor by the operator himself insofar as this equipment is not
a spare part or tool
3.27
marking
signs or inscriptions for the identification of the type of a component or device at
...