IEC 62271-106:2021

IEC 62271-106 ®
Edition 2.0 2021-04
INTERNATIONAL
STANDARD
High-voltage switchgear and controlgear –
Part 106: Alternating current contactors, contactor-based controllers and motor-
starters
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IEC 62271-106 ®
Edition 2.0 2021-04
INTERNATIONAL
STANDARD
High-voltage switchgear and controlgear –

Part 106: Alternating current contactors, contactor-based controllers and motor-

starters
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.130.10 ISBN 978-2-8322-9635-6

– 2 – IEC 62271-106:2021  IEC 2021
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 7
3 Terms and definitions . 8
4 Normal and special service conditions . 23
5 Ratings . 24
6 Design and construction . 38
7 Type tests . 42
8 Routine tests . 70
9 Guide to the selection of contactors and motor-starters for service (informative) . 72
10 Information to be given with enquiries, tenders and orders (informative) . 76
11 Transport, storage, installation, operating instructions and maintenance. 78
12 Safety . 78
13 Influence of the product on the environment . 78
Annex A (normative) Identification of test objects . 79
Annex B (informative) Determination of the equivalent RMS value of a short-time
current during a short-circuit of a given duration . 80
Annex C (normative) Method for weatherproofing test for outdoor switchgear and
controlgear . 81
Annex D (informative) References for auxiliary and control circuit components . 82
Annex E (normative) Tolerances on test quantities during tests . 83
Annex F (informative) Information and technical requirements to be given with
enquires, tenders and orders . 88
Annex G (informative) List of symbols and abbreviations . 89
Annex H (informative) Electromagnetic compatibility on site . 90
Annex I (informative) List of notes concerning certain countries . 91
Annex J (informative) Extension of validity type tests . 92
Annex K (informative) Exposure to pollution . 93
Annex AA (normative) Records and reports of type tests for making, breaking and
short-time current performance . 94
Annex BB (normative) Disconnectors and earthing switches used in controllers . 98
Bibliography . 100

Figure 1 – Examples of speed/time curves . 32
Figure 2 – Representation by two parameters of a prospective TRV of a circuit . 60
Figure 3 – Representation of the specified TRV by a two-parameter reference line and
a delay line . 60
Figure 4 – Determination of power-frequency recovery voltage . 61
Figure 5 – Test duties A and B – preferred earth point . 63
Figure 6 – Test duties A and B – alternative earth point . 64
Figure 7 – Test duty C – preferred earth point . 64
Figure 8 – Test duty C – alternative earth point . 65
Figure 9 – Characteristics for determining take-over current . 66

Figure BB.1 – Disconnector and earthing switch locations . 98

Table 1 – Ratings and characteristics . 25
Table 2 – Utilization categories . 31
Table 3 – Characteristics dependent on starter type . 37
Table 4 – Applicable type tests . 44
Table 5 – Intermittent duty operating cycles . 48
Table 6 – Verification of rated making and breaking capacities – Conditions for making
and breaking corresponding to the several utilization categories at rated voltage U . 52
r
Table 7 – Relationship between current broken I and OFF time . 55
c
Table 8 – Overload current withstand requirements . 56
Table 9 – Transient recovery voltage characteristics . 63
Table 10 – Verification of the number of on-load operating cycles – Conditions for

making and breaking corresponding to the several utilization categories . 68
Table E.101 – Tolerances on test quantities for type test . 83
Table G.101 – Additional list of symbols and abbreviations . 89

– 4 – IEC 62271-106:2021  IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 106: Alternating current contactors,
contactor-based controllers and motor-starters

FOREWORD
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International Standard IEC 62271-106 has been prepared by subcommittee 17A: Switching
devices, of IEC technical committee 17: High-voltage switchgear and controlgear.
This second edition cancels and replaces the first edition published in 2011. It constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
• document numbered to correspond to IEC 62271-1 2017.

The text of this International Standard is based on the following documents:
FDIS Report on voting
17A/1296/FDIS 17A/1301/RVD
Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
This standard is to be read in conjunction with IEC 62271-1:2017. In order to simplify the
indication of corresponding requirements, the same numbering of clauses and subclauses is
used as in IEC 62271-1. Modifications to these clauses and subclauses are given under the
same numbering, whilst additional subclauses are numbered from 101.
A list of all parts of the IEC 62271 series under the general title, High-voltage switchgear and
controlgear,
...