prEN IEC 60730-2-7:2024
(Main)Automatic electrical controls - Part 2-7: Particular requirements for timers and time switches
Automatic electrical controls - Part 2-7: Particular requirements for timers and time switches
Automatische elektrische Regel- und Steuergeräte - Teil 2-7: Besondere Anforderungen an Zeitsteuergeräte und Schaltuhren
Dispositifs de commande électrique automatiques - Partie 2-7: Exigences particulières pour les minuteries et les minuteries cycliques
Avtomatske električne krmilne naprave - 2-7. del: Posebne zahteve za stikalne ure in časovna stikala
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2024
Avtomatske električne krmilne naprave - 2-7. del: Posebne zahteve za stikalne ure
in časovna stikala
Automatic electrical controls - Part 2-7: Particular requirements for timers and time
switches
Automatische elektrische Regel- und Steuergeräte - Teil 2-7: Besondere Anforderungen
an Zeitsteuergeräte und Schaltuhren
Dispositifs de commande électrique automatiques - Partie 2-7: Exigences particulières
pour les minuteries et les minuteries cycliques
Ta slovenski standard je istoveten z: prEN IEC 60730-2-7:2024
ICS:
39.040.99 Drugi merilniki časa Other time-measuring
instruments
97.120 Avtomatske krmilne naprave Automatic controls for
za dom household use
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
72/1452/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60730-2-7 ED4
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-09-06 2024-11-29
SUPERSEDES DOCUMENTS:
72/1449/RR
IEC TC 72 : AUTOMATIC ELECTRICAL CONTROLS
SECRETARIAT: SECRETARY:
United States of America Ms Grace Roh
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
ASPECTS CONCERNED:
Electromagnetic Compatibility,Safety
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
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The CENELEC members are invited to vote through the
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This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
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Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the
final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
Automatic electrical controls - Part 2-7: Particular requirements for timers and time switches
PROPOSED STABILITY DATE: 2028
NOTE FROM TC/SC OFFICERS:
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IEC CDV 60730-2-7 ED4 © IEC 2024 -2- 72/1452/CDV
1 CONTENTS
2 CONTENTS . 2
3 1 Scope . 7
4 2 Normative references . 8
5 3 Terms and definitions . 8
6 3.3 Definitions relating to the function of controls . 8
7 3.5 Definitions of types of control according to construction . 8
8 4 General . 9
9 5 Required technical information . 9
10 5.1 Methods of providing technical information . 9
11 6 Protection against electric shock . 9
12 7 Provision for protective earthing . 9
13 8 Terminals and terminations . 9
14 9 Constructional requirements . 9
15 9.4 Actions . 10
16 9.12 10
17 10 Threaded parts and connections . 11
18 11 Creepage distances, clearances and distances through solid insulation . 11
19 12 Components . 11
20 13 Fault assessment on electronic circuits. 11
21 13.1 Fault assessment for inherent safety . 11
22 14 Moisture and dust resistance . 11
23 15 Electric strength and insulation resistance . 11
24 16 Heating . 11
25 17 Manufacturing deviation and drift . 11
26 18 Environmental stress . 12
27 19 Endurance . 12
28 19.1 General requirements . 12
29 19.2 Electrical conditions for the tests . 13
30 19.15 Test for particular purpose controls . 13
31 20 Mechanical strength . 15
32 20.4 In-line cord controls . 15
33 21 Resistance to heat, fire and tracking . 15
34 22 Resistance to corrosion . 15
35 23 Electromagnetic compatibility (EMC) requirements – Emission . 15
36 24 Normal operation . 15
37 25 Electromagnetic compatibility (EMC) requirements – Immunity . 15
38 25.6 Electrical fast transient immunity test . 15
39 25.8 Electrostatic discharge . 15
40 26 Abnormal operation tests . 16
41 Annex H (normative) Requirements related to functional safety . 17
42 Annex Q (informative) Regional differences relevant for the member countries of
43 Cenelec . 19
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Q.30.1 Methods of providing technical information . 19
45 Annex R (informative) National differences relevant in the United States of America . 20
46 R.3 Terms and definitions . 20
47 R.5 Required technical information . 20
48 R.5.1 Methods of providing technical information . 20
49 R.19 .
50 Endurance . 20
51 R.19.15 Test for particular purpose controls . 20
52 Annex T (informative) National differences relevant in Canada . 23
53 T.2 Normative references . 23
54 T.3 Terms and definitions . 23
55 T.5 Required technical information . 23
56 T.5.1 Methods of providing technical information . 23
57 T.19 Endurance . 23
58 T.19.15 Test for particular purpose controls . 23
59 Annex AA (normative) Number of cycles, automatic and manual action . 26
60 Bibliography . 27
62 Table 1 – Required technical information and methods of providing these information . 9
63 Table 18 – Electrical conditions for the overvoltage and endurance test . 13
64 Table 19 – Electrical conditions for the overload tests of 19.7 and 19.10 . 13
65 Table 20 – Electrical conditions for the overload tests of 19.8, 19.9, 19.11, 19.12 and
66 19.13 . 13
67 Table 2 – Required technical information and methods of providing these information . 20
68 Table 101 – Electrical conditions for overload and endurance testing. 22
69 Table 2 – Required technical information and methods of providing these information . 23
70 Table 101 – Electrical conditions for overload and endurance testing. 25
IEC CDV 60730-2-7 ED4 © IEC 2024 -4- 72/1452/CDV
72 INTERNATIONAL ELECTROTECHNICAL COMMISSION
73 ____________
75 AUTOMATIC ELECTRICAL CONTROLS –
77 Part 2-7: Particular requirements for timers and time switches
79 FOREWORD
80 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
81 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
82 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
83 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
84 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
85 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
86 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
87 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
88 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
89 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
90 consensus of opinion on the relevant subjects since each technical committee has representation from all
91 interested IEC National Committees.
92 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
93 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
94 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
95 misinterpretation by any end user.
96 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
97 transparently to the maximum extent possible in their national and regional publications. Any divergence between
98 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
99 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
100 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
101 services carried out by independent certification bodies.
102 6) All users should ensure that they have the latest edition of this publication.
103 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
104 members of its technical committees and IEC National Committees for any personal injury, property damage or
105 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
106 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
107 Publications.
108 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
109 indispensable for the correct application of this publication.
110 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
111 rights. IEC shall not be held responsible for identifying any or all such patent rights.
112 IEC 60730-2-7 has been prepared by IEC technical committee 72: AUTOMATIC ELECTRICAL
113 CONTROLS. It is an International Standard.
114 This 4.0 edition cancels and replaces the 3.0 edition published in 2015. This edition constitutes
115 a technical revision.
116 This edition includes the following significant technical changes with respect to the previous
117 edition:
118 a) adoption to IEC 60730-1 Ed.6.0 with all of its significant changes to IEC 60730-1 Ed.4.
119 The text of this International Standard is based on the following documents:
Draft Report on voting
XX/XX/FDIS XX/XX/RVD
121 Full information on the voting for its approval can be found in the report on voting indicated in
122 the above table.
IEC CDV 60730-2-7 ED4 © IEC 2024 -5- 72/1452/CDV
The language used for the development of this International Standard is English.
124 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
125 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
126 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
127 described in greater detail at www.iec.ch/publications.
128 A list of all parts of the IEC 60730 series, under the general title: AUTOMATIC ELECTRICAL
129 CONTROL, can be found on the IEC website.
130 This part 2-7 is intended to be used in conjunction with IEC 60730-1. It was established on the
131 basis of the sixth edition of that standard 2022. Consideration may be given to future editions
132 of, or amendments to, IEC 60730-1.
133 This part 2-7 supplements or modifies the corresponding clauses in IEC 60730-1, so as to
134 convert that publication into the IEC standard: Particular requirements for timers and time
135 switches.
136 Where this part 2-7 states "addition", "modification" or "replacement", the relevant requirement,
137 test specification or explanatory matter in part 1 should be adapted accordingly.
138 Where no change is necessary part 2-7 indicates that the relevant clause or subclause applies.
139 In the development of a fully international standard it has been necessary to take into
140 consideration the differing requirements resulting from practical experience in various parts of
141 the world and to recognize the variation in national electrical systems and wiring rules.
142 The reader's attention is drawn to the fact that Annex Q, Annex R, Annex S and Annex T list all
143 of the "in-some-country" clauses on differing practices of a less permanent nature relating to
144 the subject of this document.
145 In this publication:
146 1) The following print types are used:
147 – requirements proper: in roman type;
148 – test specifications: in italic type;
149 – explanatory matter: in smaller roman type.
150 – Defined terms: bold type.
151 2) Subclauses, notes or items which are additional to those in Part 1 are numbered starting
152 from 101, additional annexes are lettered AA, BB, etc.
156 The committee has decided that the contents of this document will remain unchanged until the
157 stability date indicated on the IEC website under webstore.iec.ch in the data related to the
158 specific document. At this date, the document will be
159 • reconfirmed,
160 • withdrawn,
161 • replaced by a revised edition, or
162 • amended.
IEC CDV 60730-2-7 ED4 © IEC 2024 -6- 72/1452/CDV
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.
IEC CDV 60730-2-7 ED4 © IEC 2024 -7- 72/1452/CDV
165 AUTOMATIC ELECTRICAL CONTROLS –
167 Part 2-7: Particular requirements for timer and time switches
169 This clause of Part 1 is replaced by the following:
170 1 Scope
171 This document applies to timer and time switches
172 • for use in, on, or in association with equipment for household appliance and similar use;
173 NOTE 1 Throughout this document, the word "equipment" means "appliance and equipment" and „controls“ means
174 „timer or time switches “.
175 NOTE 2 Throughout this document, the word “timers” means timers and time switches, unless the type is specifically
176 mentioned.
177 • for building automation within the scope of ISO 16484 series and IEC 63044 series
178 (HBES/BACS);
179 • for equipment that is used by the public, such as equipment intended to be used in shops,
180 offices, hospitals, farms and commercial and industrial applications;
181 • that are smart enabled controls;
182 • that are AC or DC powered controls with a rated voltage not exceeding 690 V AC or 600 V
183 DC;
184 • utilized as part of a control system or controls which are mechanically integral with
185 multifunctional controls having non-electrical outputs;
186 • as well as manual controls when such are electrically and/or mechanically integral with
187 automatic controls.
188 NOTE 3 Requirements for manually actuated mechanical switches not forming part of an automatic control are
189 contained in IEC 61058-1-1.
190 This document applies to
191 – the inherent safety of timers and timeswitches, and
192 – functional safety of timers and timeswitches and safety related systems,
193 – timers and timeswitches where the performance (for example the effect of EMC phenomena)
194 of the product can impair the overall safety and performance of the controlled system,
195 – the operating values, operating times, and operating sequences where such are associated
196 with equipment safety.
197 – timers for appliances within the scope of IEC 60335 series.
198 – manual controls when such are electrically and/or mechanically integral with timers.
199 This document specifies the requirements for construction, operation and testing of timers and
200 timeswitches used in, on, or in association with an equipment.
201 This document does not
202 • apply to time-delay switches (TDS) within the scope of IEC 60669-2-3.
203 • include devices which only indicate time or passage of time.
204 • apply to multi-functional controls having an integrated timing function which is not capable
205 of being tested as a separate timing device.
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208 2 Normative references
209 This clause of Part 1 applies except as follows:
210 Addition:
211 IEC 60669-1:2017, Switches for household and similar fixed-electrical installations - Part 1:
212 General requirements
213 IEC 60669-2-3:2006, Switches for household and similar fixed electrical installations - Part 2-
214 3: Particular requirements - Time-delay switches (TDS)
216 3 Terms and definitions
217 This clause of Part 1 is applicable except as follows:
218 3.3 Definitions relating to the function of controls
219 Add the following definition
220 3.3.101
221 timing cycle
222 program including all the switching activities involved in a start-to-finish operation of a controlled
223 appliance
224 3.3.102
225 permanent operation
226 continuous monitoring of the protective function during the operation of the appliance or system
227 for longer than 24 h
228 3.3.103
229 non-permanent operation
230 continuous monitoring of the protective function during the operation of the appliance or system
231 for less than 24 h
232 3.5 Definitions of types of control according to construction
233 Add the following definitions
234 3.5.101
235 plug-in timer
236 timer or time switch designed for direct plug-in to a socket-outlet
237 Note 1 to entry: The plug-in timer is equipped with conductor blades, pins or other means, protruding from the
238 enclosure of the control or the control body itself, to match the dimensional parameters of the socket-outlet to which
239 the control will be connected.
240 3.5.102
241 synchronous timer
242 timer or a time switch in which the transmission is effected by a device that is time-based on
243 the frequency of the power supply for the prime mover or the load
IEC CDV 60730-2-7 ED4 © IEC 2024 -9- 72/1452/CDV
244 3.5.103
245 hand-wound timer
246 timer or time switch in which the transmission is provided by actuation
247 4 General
248 This clause of Part 1 is applicable.
249 5 Required technical information
250 This clause of Part 1is applicable except as follows:
251 5.1 Methods of providing technical information
252 Table 1 – Required technical information and methods of providing these information
Clause or
Information Method
subclause
Modifications:
101)
17.1.3.101 X
Ageing period (Y) for Type 1.M or 2.M action
49 Not applicable
Additions:
101 Power reserve duration 9.4.103 D
102 Running time for manually wound switches 9.4.103 D
103 Running accuracy and setting accuracy 9.4.104 X
104 Frequency of the defined state test function H.13.2.2.2 X
105 The control is for permanent or non-permanent operation 9.12.4.2.4 X
101)
Values for in-line cord, free-standing and independently mounted controls are given in Annex AA.
255 6 Protection against electric shock
256 This clause of Part 1 is applicable.
257 7 Provision for protective earthing
258 This clause of Part 1 is applicable.
259 8 Terminals and terminations
260 This clause of Part 1 is applicable.
261 9 Constructional requirements
262 This clause of Part 1 is applicable accept as follows:
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9.4 Actions
264 Additional subclauses:
265 9.4.101 Type 1.Q or 2.Q action
266 A Type 1.Q or 2.Q action shall be so designed that it resets automatically upon loss of the
267 electrical supply
268 Compliance is checked by inspection and by test.
269 9.4.102 Type 1.R or 2.R action
270 A Type 1.R or 2.R action shall be so designed that it is interrupted upon loss of the electrical supply
271 and resumes at the point of interruption upon restoration of the electrical supply.
272 Compliance is checked by inspection and by test.
273 9.4.103 Type 1.S or 2.S action
274 A Type 1.S or 2.S action shall be so designed that, after interruption of the electrical supply for
275 any interval up to the declared period of power reserve, it resumes its intended operating
276 sequence as if no interruption of the supply has occurred.
277 If the energy store is charged by the supply voltage, then compliance is checked by a functional test,
278 carried out immediately after the operation of the timer switches into power reserve. The previous
279 operation in power reserve shall be the declared period of power reserve. Charging is carried out at
280 rated voltage for 48 h, if no other charging period is declared.
281 If the running reserve is provided by a primary battery, compliance shall be verified by calculation of
282 the power reserve by means of the battery capacity and the measured discharge current.
283 9.4.104 Type 1.T or 2.T action
284 A Type 1.T or 2.T action shall be so designed that its running accuracy in an ambient temperature of
285 20 °C to 25 °C is as declared.
286 Compliance is checked by inspection and by test.
287 9.4.105 Type 1.U or 2.U action
288 A Type 1.U or 2.U action shall be so designed that its setting means, dial assembly, indicating devices
289 and switch operating means function so that the difference between set time and actual time shall not
290 be more than the declared amount.
291 This deviation shall not be more than:
292 ±1 min for time switches with "hour" dial;
293 ±30 min for time switches with "24 hour" dial;
294 ±3,5 h for time switches with "7 day" dial;
295 ±14 h for time switches with "month" dial;
296 ±7 days for time switches with "12 month" dial.
297 Compliance is checked only on time switches with hour, 24 hour and 7 day dial by three consecutive
298 measurements.
299 9.12 Controls using software
300 Addition after the first paragraph:
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301 Software functions for timers and time switches within the scope of IEC 60730-2-7 are classified
302 as class A, unless otherwise declared by the manufacturer.
303 10 Threaded parts and connections
304 This clause of Part 1 is applicable.
305 11 Creepage distances, clearances and distances through solid insulation
306 This clause of Part 1 is applicable.
307 12 Components
308 This clause of Part 1 is applicable.
309 13 Fault assessment on electronic circuits
310 This clause of Part 1 is applicable except as follows:
311 13.1 Fault assessment for inherent safety
312 13.1.3 Component fault assessment
313 13.1.3.2 Test procedure
314 Add the following:
315 Controls shall be tested when the control is in the declared condition and when it is not.
316 NOTE Example for the declared condition could be ON / OFF position.
317 13.1.3.8 Compliance criteria
318 Replace the text as follows:
319 This clause of Part 1 is applicable except item c).
320 14 Moisture and dust resistance
321 This clause of Part 1 is applicable.
322 15 Electric strength and insulation resistance
323 This clause of Part 1 is applicable.
324 16 Heating
325 This clause of Part 1 is applicable.
326 17 Manufacturing deviation and drift
327 This clause of Part 1 is applicable.
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328 18 Environmental stress
329 This clause of Part 1 is applicable.
330 19 Endurance
331 This clause of Part 1 is applicable except as follows:
332 19.1 General requirements
333 19.1.6 Test sequence and conditions
334 19.1.6.3 Addition:
335 For manual actions which have been tested during the tests of 19.7 and 19.8, the number of cycles of
336 actuation is reduced by the number of cycles carried out during those tests.
337 If a clutch is used during the tests of 19.10 to 19.13 inclusive, care should be taken to ensure that it
338 does not fail due to the acceleration. If it fails or is considered liable to fail, the speeds of actuation
339 shall be as specified, but rest periods shall be introduced between cycles to allow the heat dissipation
340 which would occur during normal use.
341 Additional subclause:
342 19.1.6.101 At the end of each cycle, for timers only, an appropriate actuation shall be performed
343 to initiate the next cycle.
344 If a timer or time switch has different programs, that program which utilizes the maximum number of
345 contact operations shall be chosen, unless a timer with a special test program has been submitted by
346 the manufacturer.
347 If the program does not cause all the contacts to be operated, the test shall be repeated on a new set
348 or sets of samples operating on other programs to ensure that all contacts are tested. These extra
349 samples need not be tested where the design is such that the results can be reasonably predicted
350 from the result of the first set of samples, as could be done if the design of all contacts were identical.
351 If a timer with a special test program is used, it shall be so designed that it is possible, by carrying out
352 the special program, to reasonably predict the test results for all specific application programs of the
353 timer.
354 In-line cord, free-standing and independently mounted controls shall be tested as follows:
355 – For timers declared for resistive load, the number of cycles of contact operation for each
356 contact of the time switch shall be A = 5 000.
357 The number of cycles of actuation (M) for each manual action of the time switch shall be
358 M = 500 (inducing 500 cycles of contact operation).
359 – For timers declared for resistive or inductive load, the number of cycles of contact operation
360 for each contact so rated shall be 5 000, consisting of a first number of cycles A = 2 500, to
361 be tested with a substantially resistive load as specified in Tables 18, 19 or 20 followed by
362 a second number of cycles, A = 2 500, which shall be conducted at the conditions specified
363 in Tables 18, 19 or 20 for resistive or inductive load.
364 The number of cycles of actuation (M) for each manual action of these timers shall be
365 M = 500 (inducing 500 cycles of contact operation, tested under resistive load conditions).
366 – If the timer requires an external electrical or mechanical signal to move it from a rest position
367 this shall be simulated, if necessary in the manner declared by the manufacturer.
368 – For timers and time switches with Type 2 actions, any electrically driven prime mover shall
369 for at least 50 % of the test, be connected to a supply of 0,9 V , all other loads and
R
370 connections remaining as in 19.7.
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