EN 60470:2000

SLOVENSKI STANDARD
01-september-2000
High-voltage alternating current contactors and contactor-based motor starters
(IEC 60470:1999)
High-voltage alternating current contactors and contactor-based motor starters
Hochspannungs-Wechselstrom-Schütze und -Motorstarter mit Schützen
Contacteurs pour courants alternatifs haute tension et démarreurs de moteurs à
contacteurs
Ta slovenski standard je istoveten z: EN 60470:2000
ICS:
29.130.10 Visokonapetostne stikalne in High voltage switchgear and
krmilne naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL IEC
STANDARD
Second edition
1999-10
High-voltage alternating current contactors
and contactor-based motor-starters
Contacteurs pour courants alternatifs haute tension
et démarreurs de moteurs à contacteurs
 IEC 1999  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
Commission Electrotechnique Internationale
PRICE CODE
XC
International Electrotechnical Commission
For price, see current catalogue

– 2 – 60470 © IEC:1999(E)
CONTENTS
Page
FOREWORD . 5
Clause
1 General. 7
1.1 Scope and object . 7
1.2 Normative references. 9
2 Normal service conditions . 10
2.1 Special service conditions . 10
3 Definitions. 10
3.1 General terms . 10
3.2 Assemblies of switchgear and controlgear . 11
3.3 Parts of assemblies. 11
3.4 Switching devices. 11
3.5 Parts of switchgear and controlgear. 13
3.6 Operation. 14
3.7 Characteristic quantities. 16
4 Ratings . 20
4.1 Rated voltage (U ) . 22
r
4.2 Rated insulation level . 22
4.3 Rated frequency (f ) . 23
r
4.4 Rated normal current and temperature rise. 23
4.5 Rated short-time withstand current (I ) . 24
k
4.6 Rated peak withstand current (I ) . 24
p
4.7 Rated duration of short circuit (t ). 24
k
4.8 Rated supply voltage of closing and opening devices, and of auxiliary and
control circuits (U ) . 24
a
4.9 Rated supply frequency of closing and opening devices, and of auxiliary circuits. 24
4.10 Rated pressure of compressed gas supply for insulation and/or operation. 24
5 Design and construction . 33
5.1 Requirements for liquids. 33
5.2 Requirements for gases . 33
5.3 Earthing . 33
5.4 Auxiliary and control equipment. 34
5.5 Dependent power operation. 34
5.6 Stored energy operation . 34
5.7 Independent manual operation . 34
5.8 Operation of releases. 34
5.9 Low- and high-pressure interlocking and monitoring devices. 34
5.10 Nameplates. 34
5.11 Interlocking devices . 35
5.12 Position indication . 35
5.13 Degrees of protection by enclosures. 35
5.14 Creepage distances . 35

60470 © IEC:1999(E) – 3 –
Clause Page
5.15 Gas and vacuum tightness . 35
5.16 Liquid tightness. 36
5.17 Flammability. 36
5.18 Electromagnetic compatibility (EMC) . 36
6 Type tests . 41
6.1 General. 41
6.2 Dielectric tests . 43
6.3 Radio interference voltage (r.i.v.) test. 43
6.4 Measurement of the resistance of circuits. 43
6.5 Temperature-rise tests . 43
6.6 Short-time withstand current and peak withstand current tests . 47
6.7 Verification of the protection. 47
6.8 Tightness tests. 47
6.9 Electromagnetic compatibility tests (EMC) . 47
7 Routine tests.59
7.1 Dielectric test on the main circuit. 59
7.2 Dielectric test on auxiliary and control circuits. 59
7.3 Measurement of the resistance of the main circuit . 59
7.4 Tightness test . 59
7.5 Design and visual checks . 60
8 Guide to the selection of contactors and motor-starters for service . 61
9 Information to be given with enquiries, tenders and orders. 65
10 Rules for transport, storage, erection, operation and maintenance . 66
11 Safety . 66
Annex A (normative) Records and reports of type tests for making, breaking
and short-time current performance . 75
Figure 1 – Examples of speed/time curves . 67
Figure 2 – Test duties A and B – preferred earth point . 68
Figure 3 – Test duties A and B – alternative earth point. 69
Figure 4 – Test duty C – preferred earth point . 70
Figure 5 – Test duty C – alternative earth point . 71
Figure 6 – Representation by two parameters of a prospective TRV of a circuit . 71
Figure 7 – Representation by four parameters of a prospective TRV of a circuit. 72
Figure 8 – Representation of the specified TRV by a two-parameter reference line
and a delay line . 72
Figure 9 – Determination of power frequency recovery voltage . 73
Figure 10 – Characteristics for determining take-over current. 74

– 4 – 60470 © IEC:1999(E)
Page
Table 1 – Ratings and characteristics – Rating/characteristic . 21
Table 2 – Utilization categories . 28
Table 3 – Characteristics dependent on starter type. 33
Table 4 – Characteristics of the opening operation of overload relays when energized
on all poles. 39
Table 5 – Characteristics of the opening operation of three-pole thermal overload relays
when energized on two poles only. 39
Table 6 – Characteristics of the opening by three-pole phase failure-sensitive thermal
overload relays when their poles are not equally energized. 40
Table 7 – Applicable type tests . 42
Table 8 – Test copper conductors for test currents up to 800 A inclusive. 44
Table 9 – Intermittent duty operating cycles . 45
Table 10 – Verification of rated making and breaking capacities – Conditions for making
and breaking corresponding to the several utilization categories at rated voltage U . 49
r
Table 11 – Relationship between current broken I and OFF time. 52
c
Table 12 – Overload current withstand requirements. 53
Table 13 – Transient recovery voltage characteristics . 58
Table 14 – Verification of the number of on-load operating cycles – Conditions for
making and breaking corresponding to the several utilization categories. 59

60470 © IEC:1999(E) – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-VOLTAGE ALTERNATING CURRENT CONTACTORS
AND CONTACTOR-BASED MOTOR-STARTERS
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
...