EN 61800-5-1:2003

SLOVENSKI SIST EN 61800-5-1:2004

STANDARD
september 2004
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Adjustable speed electrical power drive systems - Part 5-1: Safety requirements -
Electrical, thermal and energy (IEC 61800-5-1:2003)
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EUROPEAN STANDARD EN 61800-5-1
NORME EUROPÉENNE
EUROPÄISCHE NORM April 2003
ICS 29.130
English version
Adjustable speed electrical power drive systems
Part 5-1: Safety requirements -
Electrical, thermal and energy
(IEC 61800-5-1:2003)
Entraînements électriques de puissance  Elektrische Leistungsantriebssysteme
à vitesse variable mit einstellbarer Drehzahl
Partie 5-1: Exigences de sécurité - Teil 5-1: Anforderungen an die Sicherheit -
Electrique, thermique et énergétique Elektrische, thermische und energetische
(CEI 61800-5-1:2003) Anforderungen
(IEC 61800-5-1:2003)
This European Standard was approved by CENELEC on 2003-03-01. 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, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, 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

© 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 61800-5-1:2003 E
Foreword
The text of document 22G/108/FDIS, future edition 1 of IEC 61800-5-1, prepared by SC 22G,
Semiconductor power converters for adjustable speed electric drive systems, of IEC TC 22, Power
electronic systems and equipment, was submitted to the IEC-CENELEC parallel vote and was
approved by CENELEC as EN 61800-5-1 on 2003-03-01.

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) 2003-12-01

– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2006-03-01

Annexes designated "normative" are part of the body of the standard.
Annexes designated "informative" are given for information only.
In this standard, annexes C and ZA are normative and annexes A, B, D and E are informative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61800-5-1:2003 was approved by CENELEC as a
European Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 61082 NOTE Harmonized as EN 61082 series (not modified).
IEC 62079 NOTE Harmonized as EN 62079:2001 (not modified).
__________
- 3 - EN 61800-5-1:2003
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 Series Rotating electrical machines EN 60034 Series

1)
IEC 60050-111 - International Electrotechnical - -
Vocabulary (IEV)
Chapter 111: Physics and chemistry

1)
IEC 60050-151 - Part 151: Electrical and magnetic - -
devices
1)
IEC 60050-161 - Chapter 161: Electromagnetic - -
compatibility
1)
IEC 60050-191 - Chapter 191: Dependability and quality - -
of service
1)
IEC 60050-441 - Chapter 441: Switchgear, controlgear - -
and fuses
1)
IEC 60050-442 - Part 442: Electrical accessories - -

1)
IEC 60050-551 - Part 551: Power electronics - -

1)
IEC 60050-601 - Chapter 601: Generation, transmission - -
and distribution of electricity - General

IEC 60060-1 1989 High-voltage test techniques HD 588.1 S1 1991
+ corr. March 1990 Part 1: General definitions and test
requirements
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

1)
Undated reference.
Publication Year Title EN/HD Year
2)
IEC 60112 1979 Method for determining the comparative HD 214 S2 1980
and the proof tracking indices of solid
insulating materials under moist
conditions
IEC 60204-11 2000 Safety of machinery - Electrical EN 60204-11 2000
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
3)
IEC 60249-1 1982 Base materials for printed circuits EN 60249-1 1993
Part 1: Test methods
IEC 60364-1 2001 Electrical installations of buildings - -
Part 1: Fundamental principles,
assessment of general characteristics,
definitions
IEC 60417 Series Graphical symbols for use on equipment EN 60417 Series

IEC 60529 1989 Degrees of protection provided by EN 60529 1991
enclosures (IP Code) + corr. May 1993

IEC 60617 Series Graphical symbols for diagrams EN 60617 Series

4)
IEC 60664-1 1992 Insulation coordination for equipment EN 60664-1 2003
within low-voltage systems
Part 1: Principles, requirements and
tests
5)
IEC 60664-3 1992 Part 3: Use of coatings to achieve HD 625.3 S1 1997
insulation coordination of printed board
assemblies
IEC 60695-2-10 2000 Fire hazard testing EN 60695-2-10 2001
Part 2-10: Glowing/hot-wire based test
methods - Glow-wire apparatus and
common test procedure
IEC 60695-2-11 2000 Part 2-11: Glowing/hot-wire based test EN 60695-2-11 2001
methods - Glow-wire flammability test
method for end-products
IEC 60695-2-12 2000 Part 2-12: Glowing/hot-wire based test EN 60695-2-12 2001
methods - Glow-wire flammability test
method for materials
2)
HD 214 S2 is superseded by EN 60112:2003, which is based on IEC 60112:2003.
3)
EN 60249-1 includes A1:1984 + A2:1989 + A3:1991 to IEC 60249-1.
4)
EN 60664-1 includes A1:2000 + A2:2002 to IEC 60664-1.
5)
HD 625.3 S1 is superseded by EN 60664-3:2003, which is based on IEC 60664-3:2003.

- 5 - EN 61800-5-1:2003
Publication Year Title EN/HD Year
IEC 60695-2-13 2000 Part 2-13: Glowing/hot-wire based test EN 60695-2-13 2001
methods - Glow-wire ignitability test
method for materials
IEC 60695-11-10 1999 Part 11-10: Test flames - 50 W EN 60695-11-10 1999
horizontal and vertical flame test
methods
IEC 60695-11-20 1999 Part 11-20: Test flames - 500 W flame EN 60695-11-20 1999
test methods
IEC 60707 1999 Flammability of solid non-metallic EN 60707 1999
materials when exposed to flame
sources - List of test methods

IEC/TR 60755 1983 General requirements for residual - -
current operated protective devices

IEC 60947-7-1 2002 Low-voltage switchgear and controlgear EN 60947-7-1 2002
Part 7-1: Ancillary equipment - Terminal
blocks for copper conductors
IEC 60947-7-2 2002 Part 7-2: Ancillary equipment - EN 60947-7-2 2002
Protective conductor terminal blocks for
copper conductors
IEC 60990 1999 Methods of measurement of touch EN 60990 1999
current and protective conductor current

IEC 61800-1 1997 Adjustable speed electrical power drive EN 61800-1 1998
systems
Part 1: General requirements - Rating
specifications for low voltage adjustable
speed d.c. power drive systems

IEC 61800-2 1998 Part 2: General requirements - Rating EN 61800-2 1998
specifications for low voltage adjustable
frequency a.c. power drive systems

IEC 61800-3 1996 Part 3: EMC product standard including EN 61800-3 1996
specific test methods A11 2000

IEC 61800-4 2002 Part 4: General requirements - Rating EN 61800-4 2003
specifications for a.c. power drive
systems above 1 000 V a.c. and not
exceeding 35 kV
ISO 3864 1984 Safety colours and safety signs - -

NORME CEI
INTERNATIONALE IEC
61800-5-1
INTERNATIONAL
Première édition
STANDARD
First edition
2003-02
Entraînements électriques de puissance
à vitesse variable –
Partie 5-1:
Exigences de sécurité –
Electrique, thermique et énergétique
Adjustable speed electrical power
drive systems –
Part 5-1:
Safety requirements –
Electrical, thermal and energy
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Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch  Web: www.iec.ch
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Международная Электротехническая Комиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

61800-5-1  IEC:2003 – 3 –
CONTENTS
FOREWORD . 7
1 Scope . 9
2 Normative references. 9
3 Terms and definitions.15
3.1 System .15
3.2 General .15
3.3 Test classification .23
4 Protection against electric shock, thermal, and energy hazards.27
4.1 General .27
4.2 Protection against electric shock .27
4.3 Protection against thermal hazards .81
4.4 Protection against energy hazards.87
5 Test requirements .89
5.1 General .89
5.2 Test specifications .95
6 Information and marking requirements .129
6.1 General .129
6.2 Information for selection.133
6.3 Information for installation and commissioning .133
6.4 Information for use.141
6.5 Information for maintenance.147
Annex A (informative) Examples of protection in case of direct contact .149
Annex B (informative) Symbols referred to in this part of IEC 61800.153
Annex C (normative) Measurement of clearance and creepage distances.155
Annex D (informative) Cross-sections of round conductors .167
Annex E (informative) Guidelines for RCD compatibility .169
Bibliography .175
Figure 1 – PDS hardware configuration within an installation.25
Figure 2 – Typical waveform for a.c. working voltage .31
Figure 3 – Typical waveform for d.c. working voltage .31
Figure 4 – Typical waveform for pulsating working voltage .33
Figure 5 – Examples for protection against direct contact.37
Figure 6 – Voltage test procedures .109
Figure 7 – Circuit for high-current arcing test .123
Figure 8 – Test fixture for hot-wire ignition test .127
Figure A.1 – Protection by SELV (unearthed) or PELV (earthed), with protective
separation .149
Figure A.2 – Protection by means of protective impedance.149
Figure A.3 – Protection by using limited voltages .151

61800-5-1  IEC:2003 – 5 –
Figure C.1 to C.13 Examples of the measurement of clearance and creepage distances .155
Figure E.1 – Flow chart leading to selection of the RCD type when using a PDS
downstream.169
Figure E.2 – Fault current waveforms in connections with semiconductor devices .171
Table 1 – Summary of the limits of the decisive voltage classes .27
Table 2 – Protective conductor cross-section .45
Table 3 – Definitions of pollution degrees .49
Table 4 – Insulation voltage for low voltage circuits.55
Table 5 – Insulation voltage for high voltage circuits .55
Table 6 – Clearance distances.57
Table 7 – Creepage distances (mm) .61
Table 8 – Thickness of sheet metal for enclosures – Carbon steel or stainless steel.69
Table 9 – Thickness of sheet metal for enclosures: aluminium, copper or brass .71
Table 10 – Wire bending space from terminals to enclosure.77
Table 11 – Maximum measured temperatures for internal materials and components.85
Table 12 – Maximum measured temperatures for external parts of the PDS .87
Table 13 – Test overview.93
Table 14 – Impulse voltage test .99
Table 15 – Impulse test voltage for low-voltage PDS.101
Table 16 – Impulse test voltage for high-voltage PDS .101
Table 17 – AC or d.c. test voltage for circuits connected directly to low voltage mains .103
Table 18 – AC or d.c. test voltage for circuits connected directly to high voltage mains.105
Table 19 – AC or d.c. test voltage for circuits not connected directly to the mains.105
Table 20 – Partial discharge test.113
Table 21 – Information requirements .131
Table B.1 – Symbols used .153
Table C.1 – Width of grooves by pollution degree .155
Table D.1 – Standard cross-sections of round conductors .167

61800-5-1  IEC:2003 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS –
Part 5-1: Safety requirements –
Electrical, thermal and energy
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 61800-5-1 has been prepared by subcommittee 22G: Semi-
conductor power converters for adjustable speed electric drive systems, of IEC technical
committee 22: Power electronic systems and equipment.
The text of this part of IEC 61800 is based on the following documents:
FDIS Report on voting
22G/108/FDIS 22G/110/RVD
Full information on the voting for the approval of this part of IEC 61800 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 2.
The committee has decided that the contents of this publication will remain unchanged
until 2006. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
The contents of the corrigendum of September 2003 have been included in this copy.

61800-5-1  IEC:2003 – 9 –
ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS –
Part 5-1: Safety requirements –
Electrical, thermal and energy
1 Scope
This part of IEC 61800 specifies requirements for adjustable speed power drive systems, or
their elements, with respect to electrical, thermal and energy safety considerations. It does not
cover the driven equipment except for interface requirements. It applies to adjustable speed
electric drive systems which include the power conversion, drive control, and motor or motors.
Excluded are traction and electric vehicle drives. It applies to d.c. drive systems connected to
line voltages up to 1 kV a.c., 50 Hz or 60 Hz and a.c. drive systems with converter input or
output voltages up to 35 kV, 50 Hz or 60 Hz.
Rating specifications for d.c. power drive systems connected to line voltages up to 1 kV a.c.
are covered in IEC 61800-1.
Rating specifications for a.c. power drive systems with converter input or output voltages up to
1 kV a.c. are covered in IEC 61800-2.
EMC aspects are covered in IEC 61800-3.
Rating specifications for a.c. power drive systems with converter input or output voltages
greater than 1 kV a.c. and up to 35 kV a.c. are covered in IEC 61800-4.
The scope of this part of IEC 61800 does not include devices used as component parts of a
PDS if they comply with the safety requirements of a relevant product standard for the same
environment.
NOTE 1 In some cases, safety requirements of the overall PDS (for example, protection against direct contact)
can necessitate the use of special components and/or additional measures.
NOTE 2 For the purposes of this International Standard, energy hazards can be, for example, explosion of
components or stored energy in capacitors.
2 Normative references
The following referenced documents are indispensable for the application of this document. For
dated references, only the edition cited applies. For undated references, the latest edition of
the referenced document (including any amendments) applies.
IEC 60034 (all parts), Rotating electrical machines
IEC 60050(111), International Electrotechnical Vocabulary – Chapter 111: Physics and
chemistry
61800-5-1  IEC:2003 – 11 –
IEC 60050(151), International Electrotechnical Vocabulary – Chapter 151: Electrical and
magnetic devices
IEC 60050(161), International Electrotechnical Vocabulary – Chapter 161: Electromagnetic
compatibility
IEC 60050(191), International Electrotechnical Vocabulary – Chapter 191: Dependability and
quality of service
IEC 60050(441), International Electrotechnical Vocabulary – Chapter 441: Switchgear,
controlgear and fuses
IEC 60050(442), International Electrotechnical Vocabulary – Part 442: Electrical accessories
IEC 60050(551), International Electrotechnical Vocabulary – Part 551: Power electronics
IEC 60050(601), International Electrotechnical Vocabulary – Chapter 601: Generation,
transmission and distribution of electricity – General
IEC 60060-1:1989, High-voltage test techniques. Part 1: General definitions and test
requirements
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 60112:1979, Method for determining the comparative and the proof tracking indices of solid
insulating materials under moist conditions
IEC 60204-11:2000, Safety of machinery – Electrical equipment of machines – Part 11:
Requirements for HV equipment for voltages above 1 000V a.c. or 1 500V d.c. and not
exceeding 36 kV
IEC 60249-1:1982, Base materials for printed circuits – Part 1: Test methods
IEC 60364-1:2001, Electrical installations of buildings – Part 1: Fundamental principles,
assessment of general characteristics, definitions
IEC 60417 (all parts), Graphical symbols for use on equipment
IEC 60529:1989, Degrees of protection provided by enclosures (IP code)
IEC 60617: Graphical symbols for diagrams
IEC 60664-1:1992, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
___________
There is a consolidated edition 2.1 (2001) that includes edition 2.0 and its Amendment 1.
There is a consolidated edition 1.2 (2002) that includes edition 1.0 and its Amendments 1 and 2.

61800-5-1  IEC:2003 – 13 –
IEC 60664-3:1992, Insulation coordination for equipment within low-voltage systems – Part 3:
Use of coatings to achieve insulation coordination of printed board assemblies
IEC 60695-2-10:2000, Fire hazard testing – Part 2-10: Glowing/hot-wire based test methods –
Glow-wire apparatus and common test procedure
IEC 60695-2-11:2000, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –
Glow-wire flammabiliy test method for end products
IEC 60695-2-12:2000, Fire hazard testing – Part 2-12: Glowing/hot-wire based test methods –
Glow-wire flammability test method for materials
IEC 60695-2-13:2000, Fire hazard testing – Part 2-13: Glowing/hot-wire based test methods –
Glow-wire ignitability test method for materials
IEC 60695-11-10:1999, Fire hazard testing – Part 11-10: Test flames – 50 W horizontal and
vertical flame test methods
IEC 60695-11-20:1999, Fire hazard testing – Part 11-20: Test flames – 500 W flame test
methods
IEC 60707:1999, Flammability of solid non-metallic materials when exposed to flame sources –
List of test methods
IEC 60755:1983, General requirements for residual current operated protective devices
IEC 60947-7-1:2002 Low-voltage switchgear and control gear – Part 7-1: Ancillary equipment –
Terminal blocks for copper conductors
IEC 60947-7-2:2002, Low-voltage switchgear and controlgear – Part 7-2: Ancillary equipment –
Protective conductor terminal blocks for copper conductors
IEC 60990:1999, Methods of measurement of touch current and protective conductor current
IEC 61800-1:1997, Adjustable speed electrical power drive systems – Part 1: General
requirements – Rating specifications for low voltage adjustable speed d.c. power drive systems
IEC 61800-2:1998, Adjustable speed electrical power drive systems – Part 2: General
requirements – Rating specifications for low voltage adjustable frequency a.c. power drive
systems
IEC 61800-3:1996, Adjustable speed electrical power drive systems – Part 3: EMC product
standard including specific test methods
IEC 61800-4:2002, Adjustable speed electrical power drive systems – Part 4: General
requirements – Rating specifications for a.c. power drive systems above 1 000 V and not
exceeding 35 kV
ISO 3864:1984, Safety colours and safety signs

61800-5-1  IEC:2003 – 15 –
3 Terms and definitions
For the purposes of this part of IEC 61800, the terms and definitions given in chapters 111,
151, 161, 191, 441, 442, 551 and 601 of IEC 60050, IEC 60664-1, Parts 1 to 4 of IEC 61800
(some of which are repeated below for convenience) and the following definitions apply.
3.1 System
3.1.1
basic drive module (BDM)
drive module, which consists of, a converter section, a control equipment for speed, torque,
current or voltage, and a power semiconductor gating system, etc. (see Figure 1)
3.1.2
complete drive module (CDM)
drive system, without the motor and the sensors which are mechanically coupled to the motor
shaft, consisting of, but not limited to, the BDM, and extensions such as feeding section, field
supply, and auxiliaries (see Figure 1)
3.1.3
installation
equipment or equipments which include at least both the PDS (see 3.1.4) and the driven
equipment (see Figure 1)
3.1.4
power drive system (PDS)
power drive system, including the CDM and the motor but not the driven equipment (see Figure 1)
3.2 General
3.2.1
auxiliary circuit
circuit supplying an element or elements of a PDS other than the main motor which exchanges
mechanical power with the driven equipment
NOTE Examples of auxiliary circuits are interface, control, cooling, measurement and independent field supply
circuit of the main motor.
3.2.2
basic insulation
insulation applied to live parts to provide basic protection against electrical shock
[VEI 826-03-17, modifié]
3.2.3
closed electrical operating area
room or location for electrical equipment to which access is 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
3.2.4
comparative tracking index (CTI)
numerical value of the maximum voltage in volts at which a material withstands 50 drops
without tracking
NOTE 1 The value of each test voltage and the CTI should be divisible by 25.
[IEC 60112: 1979, definition 2.3]

61800-5-1  IEC:2003 – 17 –
3.2.5
conditionally short-circuit proof
circuit in which only prescribed protective devices such as fuses, switches, electronic
interlocks, or electronic current limiters respond when subjected to a short-circuit
3.2.6
decisive voltage class
calculated voltage range used to determine the classification of protective measures against
electric shock
3.2.7
double insulation
insulation comprising both basic insulation and supplementary insulation
[VEI 826-03-19, modified]
NOTE Basic and supplementary insulation are separate, each designed for basic protection against electric shock.
3.2.8
electrical breakdown
failure of insulation under electric stress when the discharge completely bridges the insulation,
thus reducing the voltage between the electrodes almost to zero
[IEC 60664-1:1992, definition 1.3.20]
3.2.9
ELV (Extra Low Voltage)
any voltage not exceeding 50 V a.c. r.m.s. and 120 V d.c.
NOTE RMS ripple voltage of not more than 10 % of the d.c. component.
3.2.10
FELV (Functional ELV) circuit
electrical circuit in which the voltage does not exceed ELV, and which does not comply with the
safety requirements for SELV (see 3.2.29) or PELV (see 3.2.16) circuits
3.2.11
functional insulation
insulation between conductive parts which does not provide protection against electric shock
3.2.12
high-voltage product
product with rated supply voltage between 1 kV and 35 kV a.c., 50 Hz or 60 Hz
NOTE These products fall into the scope of IEC 61800-4
3.2.13
(earth) leakage current
current flowing from the live parts of the installation to earth, in the absence of
an insulation fault
[IEV 442-01-24]
3.2.14
live part
conductor or conductive part intended to be energized in normal use, including a neutral
conductor but not a protective earth neutral

61800-5-1  IEC:2003 – 19 –
3.2.15
low-voltage product
product with rated supply voltage up to 1 000 V a.c., 50 Hz or 60 Hz
NOTE These products fall into the scope of IEC 61800-1 or IEC 61800-2.
3.2.16
PELV (Protective ELV) circuit
electrical circuit with the following characteristics:
• the voltage does not exceed ELV; and
• protective separation from circuits other than PELV or SELV; and
• provisions for earthing of the PELV circuit, or its exposed conductive parts, or both
3.2.17
professional equipment
equipment for use in trades, professions, or industries and which is not intended for sale to
the general public. The designation is specified by the manufacturer.
[IEC 61000-3-2: 2000, definition 3.15]
3.2.18
protective bonding
electrical connection to earth of conductive parts for safety purposes
3.2.19
protective class 0
equipment in which protection against electric shock relies only upon basic insulation
NOTE Equipment of this class becomes hazardous in the event of a failure of the basic insulation.
3.2.20
protective class I
equipment in which protection against electric shock does not rely on basic insulation only, but
which includes an additional safety precaution in such a way that means are provided for the
connection of accessible conductive parts to the protective (earthing) conductor in the fixed
wiring of the installation, so that accessible conductive parts cannot become live in the event of
a failure of the basic insulation
3.2.21
protective class II
equipment in which protection against electric shock does not rely on basic insulation only,
but in which additional safety precautions such as double insulation or reinforced insulation
are provided, there being no provision for protective earthing or reliance upon installation
conditions
3.2.22
protective class III
equipment in which protection against electric shock relies on supply at SELV and in which
voltages higher than those of SELV are not generated
3.2.23
protective conductor
conductor providing protection against electric shock by connecting conductive parts to earth

61800-5-1  IEC:2003 – 21 –
3.2.24
protective earthing (PE)
earthing of a point in a system, or equipment, for protection against electric shock in case of a
fault
3.2.25
protective impedance
an impedance connected between live parts and exposed conductive parts, of such value that
the current, in normal use and under likely fault conditions, is limited to a safe value, and which
is so constructed that its reliability is maintained throughout the life of the equipment
[IEV 442-04-24, modified]
3.2.26
protective screening
separation of circuits from hazardous live-parts by means of an interposed conductive screen,
connected to the means of connection for an external protective conductor
3.2.27
protective separation
separation between circuits by means of basic and supplementary protection (basic insulation
plus supplementary insulation or protective screening) or by an equivalent protective provision
(e.g. reinforced insulation)
3.2.28
reinforced insulation
single insulation system, applied to live parts, which provides a degree of protection against
electric shock equivalent to double insulation under the conditions specified in the relevant
IEC standard
[IEC 60664-1: 1992, definition 1.3.17.5]
3.2.29
SELV (Safety ELV) circuit
electrical circuit with the following characteristics:
• the voltage does not exceed ELV; and
• protective separation from circuits other than SELV or PELV; and
• no provisions for earthing of the SELV circuit, or its exposed conductive parts; and
• basic insulation of the SELV circuit from earth and from PELV circuits
3.2.30
supplementary insulation
independent insulation applied in addition to basic insulation in order to provide protection
against electric shock in the event of a failure of basic insulation
[IEC 60664-1: 1992, definition 1.3.17.3]
NOTE Basic and supplementary insulation are separate, each designed for basic protection against electric shock.
3.2.31
system voltage
voltage used to determine insulation requirements
• for low voltage earthed systems: the r.m.s. value of the rated voltage between a phase and
earth
• for low voltage non-earthed three-phase systems: the r.m.s. value of the rated voltage
between a phase and an artificial neutral point (an imaginary junction of equal impedances
from each phase)
NOTE For most systems, this is equivalent to dividing the phase-to-phase voltage by √3.

61800-5-1  IEC:2003 – 23 –
• for low voltage non-earthed single-phase a.c. or d.c. systems: the r.m.s. value of the rated
voltage between the phases
• for high voltage systems, the r.m.s. value of the rated voltage between phases
3.2.32
temporary overvoltage
overvoltage at the supply frequency of relatively long duration
[IEC 60664-1:1992, definition 1.3.7.1]
3.2.33
user terminal
terminal provided for connection to be made during installation
3.2.34
working voltage
voltage, at rated supply conditions (without tolerances) and worst case operating conditions,
which occurs by design in a circuit or across insulation
NOTE The working voltage can be d.c. or a.c. Both the r.m.s. and recurring peak values are used.
3.3 Test classification
3.3.1
type test
test of one or more devices made to a certain design to show that the design meets certain
specifications
[IEV 151-04-15]
3.3.2
routine test
test to which each individual device is subjected during or after manufacture to ascertain
whether it complies with certain criteria
[IEV 151-04-16]
3.3.3
sample test
test on a number of devices taken at random from a batch
[IEV 151-04-17]
3.3.4
commissioning test
test on a device or equipment performed on site, to prove the correctness of installation and
operation
[IEV 151-04-21]
3.3.5
special test
test additional to type and routine tests, made either at the discretion of the manufacturer or
according to an agreement between the manufacturer and the customer or his representative

61800-5-1  IEC:2003 – 25 –
3.3.6
acceptance test
contractual test to prove to the customer that the device meets certain conditions of its
specification
[IEV 151-04-20]
3.3.7
witness test
any of the above tests performed in the presence of the customer, the user, or his
representative
Installation or part of installation
PDS (Power Drive System)
CDM (Complete Drive Module)
System control and sequencing
BDM (Basic Drive Module)
Converter section
Control section
Feeding section
Auxiliaries
Others
Motor and sensors
Driven equipment
IEC  257/03
Figure 1 – PDS hardware configuration within an installation

61800-5-1  IEC:2003 – 27 –
4 Protection against electric shock, thermal, and energy hazards
4.1 General
This clause 4 defines the minimum requirements for the design and construction of a PDS.
Protection against electric shock shall be maintained in single fault conditions as well as under
normal conditions.
The design of a PDS shall also be such that it has the strength and rigidity to resist any
reasonably foreseeable misuse associated with its intended application without total or partial
collapse resulting in a risk of fire, electric shock, or other hazards.
PDS shall be designed to avoid operating modes or sequences that may lead to component
failure.
Circuit analysis shall be performed on other than SELV and PELV circuits of PDS to identify
components whose failure would result in a fire or electric shock hazard. The analysis shall
include the effect of short-circuit and open-circuit conditions of the component. The analysis
shall not include power semiconductor devices, when equivalent testing is accomplished
during short-circuit tests, or components which have been independently evaluated. See
5.2.3.8 for test.
NOTE It is possible that no critical components will be revealed by the analysis. In this case, no component failure
testing is required.
Consideration shall be given to potential safety hazards associated with major component parts
of the PDS, such as motor rotating parts and flammability of transformer and capacitor oils.
4.2 Protection against electric shock
4.2.1 Decisive voltage class
4.2.1.1 Use of decisive voltage class
Protective measures against electric shock depend on the decisive voltage classification of the
circuit according to Table 1, which correlates the limits of the working voltage within the circuit
with the decisive voltage class. The decisive voltage class in turn indicates the minimum
required level of protection for the circuit.
Table 1 – Summary of the limits of the decisive voltage classes
Limits of working voltage
V
Decisive voltage a.c. voltage a.c. voltage (peak) d.c. voltage
class (r.m.s.) (mean) Subclause
U U U
ACL ACPL DCL
a
A 30 42,4 60 4.2.4.2, 4.2.4.4
B 50 71 120 4.2.5.3 a), b)
b
C 1 000 4 500 1 500
b
D >1 000 >4 500 >1 500
a
For equipment having more than one decisive voltage class A circuit, the r.m.s. and peak voltages shall not
exceed 25 V and 35,4 V respectively.
b
The value of 4 500 V allows all low-voltage products to be covered by Table 4 (possible reflections up to
3 × √2 × 1 000 V = 4 242 V).
61800-5-1  IEC:2003 – 29 –
4.2.1.1.1 Circuits of decisive voltage class A
Circuits of decisive voltage class A do not require:
• protection against direct contact, or
• protective bonding of exposed conductive parts
They require:
• at least basic insulation from circuits of decisive voltage class B
– protective separation from circuits of decisive voltage class C (if protection against
direct contact is not provided), or
– basic insulation from circuits of decisive voltage class C (if protection against direct
contact is provided by supplementary insulation for the higher voltage circuit)
• protective separation from circuits of decisive voltage class D
4.2.1.1.2 Circuits of decisive voltage class B
Circuits of decisive voltage class B do not require:
• protective bonding of exposed conductive parts
They require:
• protection against direct contact
• at least basic insulation from other circuits of decisive voltage class B
• protective separation from circuits of decisive voltage class C (if protection against direct
contact is provided by basic insulation for the decisive voltage class B circuit), or
• basic insulation from circuits of decisive voltage class C (if protection against direct contact
is provided by supplementary insulation for the higher voltage circuit)
• protective separation from circuits of decisive voltage class D
4.2.1.1.3 Circuits of decisive voltage class C
Circuits of decisive voltage class C require:
• protection against direct contact
• protective separation from circuits of decisive voltage class D
• at least basic insulation from other circuits of decisive voltage class C
• protective bonding or double or reinforced insulation of exposed conductive parts
4.2.1.1.4 Circuits of decisive voltage class D
Circuits of decisive voltage class D require:
• protection against direct contact, and
• at least basic insulation from other circuits of decisive voltage class D, and
• protective bonding or double or reinforced insulation of exposed conductive parts.

61800-5-1  IEC:2003 – 31 –
4.2.1.2 Circuit evaluation
4.2.1.2.1 General
The decisive voltage classification of a given circuit is evaluated by the method set out below,
three cases of waveforms being considered.
4.2.1.2.2 AC working voltage (see Figure 2)
U
ACP
U
AC
IEC  258/03
Figure 2 – Typical waveform for a.c. working voltage
The working voltage has an r.m.s. value of U and a recurring peak value of U .
AC ACP
The decisive voltage class is that of the lowest voltage row of Table 1 for which both of the
following co
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