IEC 60730-2-7:2015

IEC 60730-2-7 ®
Edition 3.0 2015-03
INTERNATIONAL
STANDARD
Automatic electrical controls –
Part 2-7: Particular requirements for timers and time switches

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IEC 60730-2-7 ®
Edition 3.0 2015-03
INTERNATIONAL
STANDARD
Automatic electrical controls –

Part 2-7: Particular requirements for timers and time switches

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 97.120 ISBN 978-2-8322-2432-8

– 2 – IEC 60730-2-7:2015 © IEC 2015
CONTENTS
FOREWORD . 3
1 Scope and normative references . 6
2 Definitions . 7
3 General requirements . 8
4 General notes on tests . 8
5 Rating. 8
6 Classification . 8
7 Information . 9
8 Protection against electric shock . 10
9 Provision for protective earthing . 10
10 Terminals and terminations . 10
11 Constructional requirements . 10
12 Moisture and dust resistance . 11
13 Electric strength and insulation resistance . 11
14 Heating . 11
15 Manufacturing deviation and drift . 11
16 Environmental stress . 12
17 Endurance . 12
18 Mechanical strength . 17
19 Threaded parts and connections . 17
20 Creepage distances, clearances and distances through solid insulation . 17
21 Resistance to heat, fire and tracking . 17
22 Resistance to corrosion . 17
23 Electromagnetic compatibility (EMC) requirements – emission . 17
24 Components . 18
25 Normal operation . 18
26 Electromagnetic compatibility (EMC) requirements – immunity . 18
27 Abnormal operation . 18
28 Guidance on the use of electronic disconnection . 18
Annex H (normative) Requirements for electronic controls . 19
Annex AA (normative) Number of cycles, automatic and manual action . 23
Bibliography . 24

Table 14 – Electrical conditions for the overvoltage test . 13
Table 15 – Electrical conditions for the overload tests of 17.7 and 17.10 . 13
Table 16 – Electrical conditions for the overload tests of 17.8, 17.9, 17.11, 17.12 and
17.13 . 13
Table 101 – Electrical conditions for overload and endurance testing. 16
Table AA.1 – Values for free standing, independently mounted and in-line cord timers
a
and time switches . 23

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
AUTOMATIC ELECTRICAL CONTROLS –

Part 2-7: Particular requirements
for timers and time switches
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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6) All users should ensure that they have the latest edition of this publication.
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9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60730-2-7 has been prepared by IEC technical committee 72:
Automatic electrical controls.
This third edition cancels and replaces the second edition published in 2008. This third edition
constitutes a technical revision. This new edition revises the compliance criteria of type 1.S
and 2.S action, revises the requirements for filament lamp loads, adds requirements for
abnormal operation in Annex H, removes some special requirements for single countries as
well as updates the standard to IEC 60730-1:2010, fourth edition.
This Part 2-7 is intended to be used in conjunction with IEC 60730-1. It was established on
the basis of the fourth edition (2010) of that publication. IEC 60730-1 Ed. 5 is available, and
this part 2-7 will be aligned with that edition in the future. Consideration may be given to
future editions of, or amendments to, IEC 60730-1.

– 4 – IEC 60730-2-7:2015 © IEC 2015
The title of IEC 60730-2-7 Ed.3 has been updated to the title of IEC 60730-1 Ed.5.0. However,
IEC 60730-2-7 Ed.3.0 has not been updated in accordance with the technical requirements in
IEC 60730-1 Ed. 5.0.
This Part 2-7 supplements or modifies the corresponding clauses in IEC 60730-1 so as to
convert that publication into the IEC standard: Particular requirements for timers and time
switches.
Where this Part 2-7 states "addition", "modification" or "replacement", the relevant require-
ment, test specification or explanatory matter in Part 1 should be adapted accordingly.
Where no change is necessary, this Part 2-7 indicates that the relevant clause or subclause
applies.
In the development of a fully international standard, it has been necessary to take into
consideration the differing requirements resulting from practical experience in various parts of
the world and to recognize the variation in national electrical systems and wiring rules.
The “in some countries” notes regarding differing national practice are contained in the
following clauses and subclauses:
– 6.3.6.101
– Table 1, Notes 101 and 103
– 7.2.9
– 11.4.104
– 17.16.101.1
– 17.16.101.3
– 17.16.103.1
– Table 15, Notes 101 and 102
– Table 16, Notes 101 and 102
– 21.101
– Annex D
– H.26.11
In this publication:
1) The following print types are used:
– Requirements proper: in roman type.
– Test specifications: in italic type.
– Explanatory matter: in smaller roman type
2) Subclauses, notes, tables or figures which are additional to those in Part 1 are numbered
starting from 101, additional annexes are lettered AA, BB, etc.
The text of this standard is based on the following documents:
CDV Report on voting
72/926/CDV 72/959/RVC
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 2.
...