SIST EN IEC 61810-8:2025

SLOVENSKI STANDARD
oSIST prEN IEC 61810-7-8:2023
01-oktober-2023
Električni releji - Preskusi in meritve - 7-8. del: Časovni načrt
Electrical relays - Tests and Measurements - Part 7-8: Timing
Relais électriques - Essais et mesurages - Partie 7-8: Contrôle des temps
Ta slovenski standard je istoveten z: prEN IEC 61810-7-8:2023
ICS:
29.120.70 Releji Relays
oSIST prEN IEC 61810-7-8:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 61810-7-8:2023
oSIST prEN IEC 61810-7-8:2023
94/923/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61810-7-8 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2023-08-18 2023-11-10
SUPERSEDES DOCUMENTS:
94/856/CD, 94/910/CC
IEC TC 94 : ELECTRICAL RELAYS
SECRETARIAT: SECRETARY:
Austria Mr Bernhard Spalt
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
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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:
Electrical relays – Tests and Measurements – Part 7-8: Timing

PROPOSED STABILITY DATE: 2025
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
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1 CONTENTS
2 FOREWORD . 3
3 1 Scope . 5
4 2 Normative references . 5
5 3 Terms and definitions . 5
6 4 Testing procedure. 7
7 5   Evalutation. 11
8 Annex A . 12
9 Annex T . 12
10 Bibliography . 13
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17 INTERNATIONAL ELECTROTECHNICAL COMMISSION
18 ____________
20 ELECTRICAL RELAYS – Tests and measurements
22 Part 7-8: Timing
24 FOREWORD
25 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization
26 comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to
27 promote international co-operation on all questions concerning standardization in the electrical and
28 electronic fields. To this end and in addition to other activities, IEC publishes International Standards,
29 Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter
30 referred to as "IEC Publication(s)"). Their preparation is entrusted to technical committees; any IEC National
31 Committee interested in the subject dealt with may participate in this preparatory work. International,
32 governmental and non-governmental organizations liaising with the IEC also participate in this preparation.
33 IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with
34 conditions determined by agreement between the two organizations.
35 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
36 consensus of opinion on the relevant subjects since each technical committee has representation from all
37 interested IEC National Committees.
38 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
39 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
40 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
41 misinterpretation by any end user.
42 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
43 transparently to the maximum extent possible in their national and regional publications. Any divergence between
44 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
45 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
46 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
47 services carried out by independent certification bodies.
48 6) All users should ensure that they have the latest edition of this publication.
49 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
50 members of its technical committees and IEC National Committees for any personal injury, property damage or
51 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
52 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
53 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
54 indispensable for the correct application of this publication.
55 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
56 rights. IEC shall not be held responsible for identifying any or all such patent rights.
57 The International Standards of the IEC 61810 have been prepared by IEC technical committee
58 94: All-or-nothing electrical relays.
59 The text of this International Standard is based on the following documents:
CD CC
94/856/CD 94/910/CC
61 Full information on the voting for the approval of this International Standard can be found in the
62 report on voting indicated in the above table.
63 This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
64 A list of all parts of IEC 61810 series, published under the general title Electromechanical
65 elementary relays, can be found on the IEC website.
66 This International Standard is to be used in conjunction with IEC 61810-1:2015 and 61812-
67 1:xxxx
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68 The committee has decided that the contents of this document will remain unchanged until the
69 stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
70 the specific document. At this date, the document will be
71 • reconfirmed,
72 • withdrawn,
73 • replaced by a revised edition, or
74 • amended.
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77 ELECTRICAL RELAYS – Tests and measurements
79 Part 7-8: Timing
83 1 Scope
84 This part of IEC 61810, when required by the detail specification, is used for testing
85 electromechanical elementary relays, time relays and similar components within the scope of
86 IEC technical committee 94. This test may also be used for similar devices when specified in a
87 detail specification.
88 The object of this test is to define a standard test method to ensure that the relay times are
89 within the specified limits.
90 2 Normative references
91 The following documents are referred to in the text in such a way that some or all of their content
92 constitutes requirements of this document. For dated references, only the edition cited applies.
93 For undated references, the latest edition of the referenced document (including any
94 amendments) applies.
95 IEC 61810-1:2015, Electromechanical elementary relays – Part 1: General and safety
96 requirements
97 IEC 61812-1:2011, Time relays for industrial and residential use - Part 1: Requirements and
98 tests
100 3 Terms and definitions
101 For the purpose of this document, the terms and definitions given in clause 3 of IEC 61810-7-0
102 and the following apply.
103 3.1 Terms and definitions related to electromechanical elementary relays
105 Operate / set time
106 time interval between the application of the specified input voltage to a relay in the release condition
107 and the change of state of the last output circuit, bounce time not included
109 [IEC 60050-444:2010, 444-05-01modified]
111 release time
112 time interval between the removal of the specified input voltage from a monostable relay in the operate
113 condition and the change of state of the last output circuit, bounce time not included
115 [IEC 60050-444:2002, 444-05-02]
117 reset time
118 time interval between the application of the specified input voltage to a bistable relay in the operate
119 condition and the change of state of the last output circuit, bounce time not included
121 [IEC 60050-444:2002, 444-05-03]
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124 bounce time
125 for a contact which is closing/opening its circuit, time interval between the instant when the contact
126 circuit first closes/opens and the instant when the circuit is finally closed/opened
128 [IEC 60050-444:2002, 444-05-04]
130 bridging time
131 for a change-over make-before-break contact, time interval during which both contact circuits are
132 closed
134 [IEC 60050-444:2002, 444-05-05]
136 transfer time
137 for a change-over break-before-make contact, time interval during which both contact circuits are open
139 [IEC 60050-444:2002, 444-05-06]
141 stabilization time
142 time interval between the instant when a specified input voltage is applied to an electromechanical
143 relay and the instant when the last output circuit is closed/opened and fulfils the specified
144 requirements, bounce time included
146 [IEC 60050-444:2002, 444-05-07]
148 minimum time of energization (for operation)
149 minimum duration of the input voltage to ensure that the relay operates or resets
151 [IEC 60050-444:2002, 444-05-08]
153 3.1.9
154 contact time difference
155 difference between operating times of 2 or more contacts in a multipole relay
157 3.2 Terms and definitions related to time relays
158 3.2.1
159 specified time
160 specified characteristic of a time relay at given type of function, e.g. operate time, release time,
161 pulse on time, interval time
162 [IEC 60050-445:2010, 445-05-01]
164 3.2.2
165 effect of influence (on specified time)
166 degree with which the influence quantity within its nominal range has an effect on the specified
167 time
168 [IEC 60050-445:2010, 445-06-02]
170 3.2.3
171 setting accuracy
172 difference between the measured value of the specified time and the reference value set on the
173 scale
174 NOTE For analogue setting this value relates to the maximum setting value.
175 [IEC 60050-445:2010, 445-06-07]

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176 3.2.4
177 repeatability
178 difference between the upper and lower limits of the specified confidence range determined
179 from several time measurements of a time relay under identical conditions
180 NOTE Preferably the repeatability is indicated as a percentage of the mean value of all measured values.
181 [IEC 60050-445:2010, 445-06-08]
182 3.2.5
183 recovery time
184 minimum time interval for which the power supply is removed or control signal is applied or
185 removed before the specified function can be performed again
186 [IEC 60050-445:2010, 445-05-04]
187 3.2.6
188 minimum control impulse time
189 shortest duration of the power supply or control signal to fulfil the specified function
190 [IEC 60050-445:2010, 445-05-02]
191 4 Testing procedure
192 4.1 Timing tests for elementary relays
193 Purpose
194 These tests are applicable to all elementary relays, in order to ensure that the relay times are
195 within the specified limits. These tests can be used:
196 1. for statistical evaluation of the behavior of a relays type
197 2. for confirmation of the specification of a single relay or when the application requires
198 time within fixed limits
199 Procedure
200 For the energization of the coil, the output impedance of the source shall be chosen to ensure
201 that the maximum voltage drop and the setting time do not exceed the values prescribed.
202 The switch for switching the coil shall be bounce-free
...