kSIST fprEN IEC 61810-7-6:2024

SLOVENSKI STANDARD
oSIST prEN IEC 61810-7-6:2023
01-november-2023
Električni releji - Preskusi in meritve - 7-6. del: Upornost kontaktnega tokokroga
(ali napetostni padec)
Electrical relays - Tests and Measurements - Part 7-6: Contact-circuit resistance (or
voltage drop)
Relais électriques - Essais et mesurages - Partie 7-6: Résistance (ou chute de tension)
du circuit de contact
Ta slovenski standard je istoveten z: prEN IEC 61810-7-6:2023
ICS:
29.120.70 Releji Relays
oSIST prEN IEC 61810-7-6:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 61810-7-6:2023
oSIST prEN IEC 61810-7-6:2023
94/943/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61810-7-6 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2023-09-08 2023-12-01
SUPERSEDES DOCUMENTS:
94/846/CD, 94/942/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
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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
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included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for submitting ISC claus es. (SEE
AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Electrical relays - Tests and Measurements - Part 7-6: Contact-circuit resistance (or voltage drop)

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 permis sion
in writing from IEC.
oSIST prEN IEC 61810-7-6:2023
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1 CONTENTS
3 FOREWORD . - 3 -
4 1 Scope . - 5 -
5 2 Normative references . - 5 -
6 3 Terms and definitions . - 5 -
7 4 Test procedure . - 5 -
8 4.1 Elementary relays . - 5 -
9 4.1.1 Purpose . - 5 -
10 4.1.2 Procedure . - 6 -
11 4.1.2.1 Measurement details . - 6 -
12 4.1.2.2 Test current and voltage . - 6 -
13 4.1.2.3 Measuring Cycles . - 7 -
14 4.1.2.3.1 Measurement with direct current . - 7 -
15 4.1.2.3.2 Measurement with alternating current . - 7 -
16 4.1.3 Conditions to be specified . - 7 -
17 4.2 Reed relay . - 8 -
18 4.2.1 Purpose . - 8 -
19 4.2.2 Procedure . - 8 -
20 4.2.3 Conditions to be specified . - 10 -
21 5 Evaluation . - 10 -
22 5.1 Elementary relay . - 10 -
23 5.2 Reed relay . - 11 -
24 Annex T (informative) Test report . - 12 -
25 a) Test standard, edition (test procedure) . . - 12 -
26 Bibliography . - 13 -
28 Figure 1 – Time definitions . - 9 -
29 Figure 2 – Sequence of contact-circuit resistance measurement . - 10 -
31 Table 1 – Test current and voltage . - 7 -
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36 INTERNATIONAL ELECTROTECHNICAL COMMISSION
37 Electrical relays – Tests and Measurements –
38 Part 7-6: Contact-circuit resistance (or voltage drop)
39 FOREWORD
40 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all
41 national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
42 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in
43 addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
44 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation
45 is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
46 participate in this preparatory work. International, governmental and non-governmental organizations liaising with
47 the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
48 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
49 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
50 consensus of opinion on the relevant subjects since each technical committee has representation from all interested
51 IEC National Committees.
52 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
53 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
54 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
55 misinterpretation by any end user.
56 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
57 transparently to the maximum extent possible in their national and regional publications. Any divergence between
58 any IEC Publication and the corresponding national or regional publication shall be clear ly indicated in the latter.
59 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
60 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services
61 carried out by independent certification bodies.
62 6) All users should ensure that they have the latest edition of this publication.
63 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
64 members of its technical committees and IEC National Committees for any personal injury, property damage or other
65 damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising
66 out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
67 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
68 indispensable for the correct application of this publication.
69 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
70 rights. IEC shall not be held responsible for identifying any or all such patent rights.
71 The International Standards of the IEC 61810 have been prepared by IEC technical committee 94:
72 All-or-nothing electrical relays.
73 This document is a CDV based on the observations of CC files on 94_846e_CD. The red text has
74 changed from the document of 94_846e_CD.
75 The text of this International Standard is based on the following documents:
CD CC
94/846/CD 94/942/CC
77 Full information on the voting for the approval of this International Standard can be found in the
78 report on voting indicated in the above table.
79 This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

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80 A list of all parts of IEC 61810 series, published under the general title Electromechanical
81 elementary relays, can be found on the IEC website.
82 This International Standard is to be used in conjunction with IEC 61810-1:2015.
83 The committee has decided that the contents of this document will remain unchanged until the
84 stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to the
85 specific document. At this date, the document will be
86 • reconfirmed,
87 • withdrawn,
88 • replaced by a revised edition, or
89 • amended.
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91 Electrical relays – Tests and Measurements –
92 Part 7-6: Contact-circuit resistance (or voltage drop)
95 1 Scope
96 This part of IEC 61810-7 is used for testing all kinds of relays within the scope of technical
97 committee 94 and shall evaluate their ability to perform under expected conditions of
98 transportation, storage and all aspects of operational use.
99 The object of this part is to define a standard test method to measure contact-circuit resistance (or
100 voltage drop).
101 2 Normative references
102 The following documents are referred to in the text in such a way that some or all of their content
103 constitutes requirements of this document. For dated references, only the edition cited applies. For
104 undated references, the latest edition of the referenced document (including any amendments) applies.
105 IEC 61810-1: 2015/AMD 1:2019, Electromechanical elementary relays – Part 1: General and
106 safety requirements
107 IEC 61810-7-0:202X, Electromechanical elementary relays – Test and measurement – Part 7-0: General
108 and Guidance
109 IEC 62246-1:2015, Reed switches - Part 1: Generic specification
110 Secretary note: All normative references will be checked and updated in a later stage.
111 3 Terms and definitions
112 For the purposes of this document, the terms and definitions given in IEC 61810-1 and
113 IEC 61810-7-0 apply.
114 ISO and IEC maintain terminological databases for use in standardization at the following
115 addresses:
116 ⚫ IEC Electropedia: available at http://www.electropedia.org/
117 ⚫ ISO Online browsing platform: available at http://www.iso.org/obp
118 4 Test procedure
119 4.1 Elementary relays
120 4.1.1 Purpose
121 Contact-circuit resistance (or voltage drop) test is to check that the resistance (or voltage drop)
122 across a closed contact remains within specified limits.

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123 4.1.2 Procedure
124 4.1.2.1 Measurement details
125 The resistance (or voltage drop) shall be measured using a four-terminal bridge, by the
126 voltmeter-ammeter method, or, particularly for dynamic tests, using automatic monitoring
127 equipment.
128 The contact-circuit resistance shall be measured with AC voltage or DC voltage. AC voltage is
129 preferred, unless otherwise specified.
130 For AC measurements, the frequency shall be 0,8 kHz to 2 kHz, or as prescribed. If d.c. is
131 prescribed, the resistance shall be measured for both polarities except for dynamic
132 testing.Measurement in the same direction is permitted without changing the polarity, provided
133 they show equivalent test results.
134 The type of measurement shall be as prescribed, and be selected from the following:
135 • static contact resistance measurement denotes that, for each measurement, the contacts
136 remain closed for an interval sufficient to allow all transients to decay. Three test cycles
137 shall be made;
138 • dynamic contact resistance measurement denotes that the relay coil is energized by a square
139 wave, the frequency being as prescribed. A specified number of cycles shall be made, and each
140 of the cycles shall be monitored. Monitoring shall start after the contact has reache
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