Time relays for industrial and residential use - Part 1: Requirements and tests

IEC 61812-1:2011 applies to time relays for industrial applications (e.g. control, automation, signal and industrial equipment). It also applies to time relays for automatic electrical controls for use in, on, or in association with equipment for residential and similar use. This edition includes the following significant technical changes with respect to the previous edition:
- addition of terms and definitions more commonly used by industry;
- addition of timing charts to help explain terms and definitions involving a sequence of events;
- addition of provisions for residential use.

Relais à temps spécifié pour applications industrielles et résidentielles - Partie 1: Exigences et essais

La CEI 61812-1:2011 s'applique aux relais à temps spécifié utilisés dans les applications industrielles (par exemple: équipements industriels de commande, d'automatisme et de signalisation). Elle s'applique également aux relais à temps spécifié de commandes électriques automatiques utilisées comme éléments constitutifs, auxiliaires ou associés aux équipements utilisés dans des applications résidentielles et analogues. Cette édition comprend les modifications techniques significatives suivantes par rapport à l'édition précédente:
- ajout des termes et définitions les plus couramment utilisés dans le secteur industriel;
- ajout de chronogrammes permettant de mieux expliquer les termes et définitions impliquant une séquence d'événements;
- ajout de dispositions relatives à des applications résidentielles.

General Information

Status
Published
Publication Date
24-May-2011
Current Stage
PPUB - Publication issued
Start Date
25-May-2011
Completion Date
25-May-2011
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IEC 61812-1
Edition 2.0 2011-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Time relays for industrial and residential use –
Part 1: Requirements and tests
Relais à temps spécifié pour applications industrielles et résidentielles –
Partie 1: Exigences et essais
IEC 61812-1:2011
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 61812-1
Edition 2.0 2011-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Time relays for industrial and residential use –
Part 1: Requirements and tests
Relais à temps spécifié pour applications industrielles et résidentielles –
Partie 1: Exigences et essais
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX X
ICS 29.120.70 ISBN 978-2-88912-488-6
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – 61812-1  IEC:2011
CONTENTS

FOREWORD ........................................................................................................................... 5

1 Scope ............................................................................................................................... 7

2 Normative references ....................................................................................................... 7

3 Terms and definitions ....................................................................................................... 9

3.1 Terms and definitions related to general terms ........................................................ 9

3.2 Terms and definitions of relay types ...................................................................... 11

4 Influence quantities ........................................................................................................ 17

5 Rated values .................................................................................................................. 18

5.1 General ................................................................................................................. 18

5.2 Input voltage and frequency .................................................................................. 18

5.3 Release voltage .................................................................................................... 19

5.4 Power consumption ............................................................................................... 19

5.5 Output circuit ......................................................................................................... 19

5.5.1 Electromechanical output circuit ................................................................ 19

5.5.2 Mechanical endurance ............................................................................... 19

5.5.3 Solid state output circuit ............................................................................ 19

5.5.4 Endurance and operating frequency .......................................................... 20

5.5.5 Conditional short circuit current ................................................................. 20

5.6 Ambient temperature ............................................................................................. 20

5.7 Transport and storage temperature ....................................................................... 20

5.8 Humidity ................................................................................................................ 20

5.9 Pollution degree .................................................................................................... 21

5.10 Altitude .................................................................................................................. 21

5.11 Timing circuit function ........................................................................................... 21

5.11.1 General ..................................................................................................... 21

5.11.2 Setting accuracy ........................................................................................ 21

5.11.3 Repeatability ............................................................................................. 21

5.11.4 Recovery time and minimum control impulse ............................................. 21

6 Provisions for testing ...................................................................................................... 22

7 Documentation and marking ........................................................................................... 22

7.1 Data ...................................................................................................................... 22

7.2 Marking ................................................................................................................. 24

8 Heating .......................................................................................................................... 25

8.1 General ................................................................................................................. 25

8.2 Test conditions ...................................................................................................... 25

8.3 Heating of terminals .............................................................................................. 25

8.3.1 General ..................................................................................................... 25

8.3.2 Heating of screw terminals and screwless terminals .................................. 25

8.3.3 Heating of quick-connect terminations ....................................................... 26

8.3.4 Heating of sockets ..................................................................................... 26

8.3.5 Heating of alternative termination types ..................................................... 27

8.4 Heating of accessible parts ................................................................................... 27

8.5 Heating of insulating materials .............................................................................. 27

9 Basic operating function ................................................................................................. 27

9.1 General ................................................................................................................. 27

9.2 Operate ................................................................................................................. 27

---------------------- Page: 4 ----------------------
61812-1  IEC:2011 – 3 –

9.3 Release ................................................................................................................. 28

9.4 Time function ........................................................................................................ 28

9.4.1 Functional test at reference values of input quantities ............................... 28

9.4.2 Influencing effects of voltage and temperature ........................................... 28

10 Insulation ....................................................................................................................... 28

10.1 General ................................................................................................................. 28

10.2 Preconditioning ..................................................................................................... 29

10.3 Dielectric strength ................................................................................................. 29

10.3.1 General ..................................................................................................... 29

10.3.2 Impulse withstand test ............................................................................... 29

10.3.3 Dielectric a.c. power frequency voltage test ............................................... 30

10.4 Protection against direct contact ........................................................................... 31

11 Electrical endurance ....................................................................................................... 31

11.1 General ................................................................................................................. 31

11.2 Resistive loads, inductive loads, and special loads ................................................ 32

11.3 Low energy loads .................................................................................................. 32

12 Conditional short-circuit current ...................................................................................... 32

12.1 General ................................................................................................................. 32

12.2 Test procedure ...................................................................................................... 32

12.3 Test circuit electromechanical output circuit .......................................................... 32

12.4 Test circuit solid state output circuit ...................................................................... 33

12.5 Condition of switching element after test ............................................................... 34

13 Clearances and creepage distances ............................................................................... 34

13.1 General ................................................................................................................. 34

13.2 Creepage distances............................................................................................... 35

13.3 Clearances ............................................................................................................ 36

13.4 Measurement of creepage distances and clearances ............................................. 37

14 Mechanical strength ....................................................................................................... 37

14.1 General ................................................................................................................. 37

14.2 Mechanical strength of terminals and current-carrying parts .................................. 38

14.2.1 General ..................................................................................................... 38

14.2.2 Mechanical strength of screw terminals and screwless terminals ............... 38

14.2.3 Mechanical strength of flat quick-connect terminations .............................. 38

14.2.4 Mechanical strength of sockets .................................................................. 38

14.2.5 Mechanical strength of alternative termination types .................................. 38

15 Heat and fire resistance.................................................................................................. 38

16 Vibration and shock ........................................................................................................ 39

16.1 Vibration................................................................................................................ 39

16.2 Shock .................................................................................................................... 39

17 Electromagnetic compatibility (EMC) .............................................................................. 40

17.1 General ................................................................................................................. 40

17.2 EMC immunity ....................................................................................................... 40

17.3 EMC radiated and conducted emission .................................................................. 42

Annex A (informative) Ball pressure test .............................................................................. 44

Bibliography .......................................................................................................................... 45

Figure 1 – Definition of ports ................................................................................................. 11

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– 4 – 61812-1  IEC:2011

Figure 2 – Definition of symbols ............................................................................................ 11

Figure 3 – Power on-delay relay ........................................................................................... 12

Figure 4 – Power off-delay relay ........................................................................................... 12

Figure 5 – Off-delay relay with control signal ........................................................................ 12

Figure 6 – On- and off-delay relay with control signal ............................................................ 13

Figure 7 – Flasher relay ........................................................................................................ 13

Figure 8 – Star-delta relay .................................................................................................... 14

Figure 9 – Summation time relay........................................................................................... 14

Figure 10 – Pulse delayed relay ............................................................................................ 15

Figure 11 – Pulse delayed relay with control signal ............................................................... 15

Figure 12 – Interval relay ...................................................................................................... 15

Figure 13 – Interval relay with control signal ......................................................................... 16

Figure 14 – Retriggerable interval relay with control signal on .............................................. 16

Figure 15 – Retriggerable interval relay with control signal off .............................................. 17

Figure 16 – Maintained time relay ......................................................................................... 17

Figure 17 – Test circuit electromechanical output, conditional short-circuit current ............... 33

Figure 18 – Test circuit solid state output, conditional short-circuit current ............................ 34

Table 1 – Influence quantities and reference values .............................................................. 17

Table 2 – Preferred values of endurance .............................................................................. 20

Table 3 – Preferred values of maximum permissible operating frequency.............................. 20

Table 4 – Recommended final values of the setting range .................................................... 21

Table 5 – Type testing .......................................................................................................... 22

Table 6 – Required relay information .................................................................................... 23

Table 7 – Areas and lengths of conductors dependent on the current carried by the

terminal ................................................................................................................................ 26

Table 8 – Temperature rise limits of accessible parts ............................................................ 27

Table 9 – Changing of influencing quantities ......................................................................... 28

Table 10 – Impulse test for basic insulation .......................................................................... 30

Table 11 – Dielectric test voltage for devices suitable for use in single-phase three or

two-wire a.c. and d.c. systems .............................................................................................. 30

Table 12 – Dielectric test voltage for devices suitable for use in three-phase four or

three-wire a.c. systems ......................................................................................................... 31

Table 13 – Minimum creepage distances for basic insulation ................................................ 36

Table 14 – Minimum clearances for basic insulation ............................................................. 37

Table 15 – Minimum clearances in controlled overvoltage conditions for internal

circuits .................................................................................................................................. 37

Table 16 – Environmental conditions influencing EMC .......................................................... 40

Table 17 – Immunity tests for industrial environments ........................................................... 41

Table 18 – Immunity tests for residential, commercial and light-industrial environments ........ 42

---------------------- Page: 6 ----------------------
61812-1  IEC:2011 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
TIME RELAYS FOR INDUSTRIAL AND RESIDENTIAL USE –
Part 1: Requirements and tests
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

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

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6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

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 61812-1 has been prepared by IEC technical committee 94: All-or-

nothing electrical relays.

This second edition cancels and replaces the first edition published in 1996. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
– update of references;
– addition of terms and definitions more commonly used by industry;

– addition of timing charts to help explain terms and definitions involving a sequence of

events;
– renumbering of clauses to bring them into a more logical order;
– addition of provisions for residential use.
---------------------- Page: 7 ----------------------
– 6 – 61812-1  IEC:2011
The text of this standard is based on the following documents:
FDIS Report on voting
94/324/FDIS 94/333/RVD

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.

A list of all parts of the IEC 61812 series can be found, under the general title Time relays for

industrial and residential use, on the IEC website.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 8 ----------------------
61812-1  IEC:2011 – 7 –
TIME RELAYS FOR INDUSTRIAL AND RESIDENTIAL USE –
Part 1: Requirements and tests
1 Scope

This part of the IEC 61812 applies to time relays for industrial applications (e.g. control,

automation, signal and industrial equipment).

It also applies to time relays for automatic electrical controls for use in, on, or in association

with equipment for residential and similar use.

The term “relay” as used in this standard comprises all types of relays with specified time

functions, other than measuring relays.

NOTE Depending on the field of application of these relays (for example automatic electrical controls for

household and similar use, switches for household and similar fixed electrical installations), further standards may

be applicable, for example IEC 60730-2-7 or IEC 60669-2-3.
2 Normative references

The following referenced documents are indispensable for the application of this document.

For dated references, only the edition cited applies. For undated references, the latest edition

of the referenced document (including any amendments) applies.

IEC 60050-444:2002, International Electrotechnical Vocabulary – Part 444: Elementary relays

IEC 60050-445:2010, International Electrotechnical Vocabulary – Part 445: Time relays

IEC 60068 (all parts), Environmental testing
IEC 60068-2-2:2007, Environmental testing – Part 2-2: Tests – Test B: Dry heat

IEC 60068-2-6:2007, Environmental testing – Part 2-6: Tests – Test Fc: Vibration (sinusoidal)

IEC 60068-2-27:2008, Environmental testing – Part 2-27: Tests – Test Ea and guidance:

Shock
IEC 60085:2007, Electrical insulation – Thermal evaluation and designation

IEC 60112:2003, Method for the determination of the proof and the comparative tracking

indices of solid insulating materials
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)

IEC 60664 (all parts), Insulation coordination for equipment within low-voltage systems

IEC 60664-1:2007, Insulation coordination for equipment within low-voltage systems – Part 1:

Principles, requirements and tests

IEC 60664-3:2003, Insulation coordination for equipment within low-voltage systems – Part 3:

Use of coating, potting or moulding for protection against pollution
---------------------- Page: 9 ----------------------
– 8 – 61812-1  IEC:2011

IEC 60664-5:2007, Insulation coordination for equipment within low-voltage systems – Part 5:

Comprehensive method for determining clearances and creepage distances equal to or less

than 2 mm

IEC 60695-2-11:2000, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –

Glow-wire flammability test method for end-products

IEC 60695-10-2:2003, Fire hazard testing – Part 10-2: Abnormal heat – Ball pressure test

IEC 60947-5-4:2002, Low-voltage switchgear and controlgear – Part 5-4: Control circuit

devices and switching elements – Method of assessing the performance of low-energy

contacts – Special tests

IEC 60999-1:1999, Connecting devices – Electrical copper conductors – Safety requirements

for screw-type and screwless-type clamping units – Part 1: General requirements and

2 2

particular requirements for clamping units for conductors from 0,2 mm up to 35 mm

(included)
IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) – Part 4-2: Testing and
measurement techniques – Elect
...

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