SIST EN 61812-1:2011
(Main)Time relays for industrial and residential use - Part 1: Requirements and tests
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.
Zeitrelais (Relais mit festgelegtem Zeitverhalten) für industrielle Anwendungen und für den Hausgebrauch - Teil 1: Anforderungen und Prüfungen
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.
Časovni releji za rabo v industriji in bivališčih - 1. del: Zahteve in preskusi
Ta del IEC 61812 velja za časovne releje za uporabe v industriji (npr. nadzor, avtomatizacija, signalna in industrijska oprema). Prav tako velja za časovne releje za avtomatske električne kontrole za uporabo v opremi, na njej ali v povezavi z njo v bivališčih in podobno uporabo. Izraz »rele«, kot se uporablja v tem standardu, zajema vse vrste relejev z nekaterimi časovnimi funkcijami, razen merilnih relejev.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2011
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SIST EN 116000-2:2002
SIST EN 61812-1:1999
SIST EN 61812-1:1999/A11:2000
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Time relays for industrial and residential use - Part 1: Requirements and tests
Ta slovenski standard je istoveten z: EN 61812-1:2011
ICS:
29.120.70 Releji Relays
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 61812-1
NORME EUROPÉENNE
August 2011
EUROPÄISCHE NORM
ICS 29.120.70 Supersedes EN 61812-1:1996 + corr. Feb.1999 + A11:1999, EN 116000-2:1992
English version
Time relays for industrial and residential use -
Part 1: Requirements and tests
(IEC 61812-1:2011)
Relais à temps spécifié pour applications Zeitrelais (Relais mit festgelegtem
industrielles et résidentielles - Zeitverhalten) für industrielle
Partie 1: Exigences et essais Anwendungen und
(CEI 61812-1:2011) für den Hausgebrauch -
Teil 1: Anforderungen und Prüfungen
(IEC 61812-1:2011)
This European Standard was approved by CENELEC on 2011-06-29. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61812-1:2011 E
Foreword
The text of document 94/324/FDIS, future edition 2 of IEC 61812-1, prepared by IEC TC 94,
All-or-nothing electrical relays, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 61812-1 on 2011-06-29.
This European Standard supersedes EN 61812-1:1996 + corrigendum February 1999 + A11:1999 and
EN 116000-2:1992.
– 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.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2012-03-29
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2014-06-29
with the EN have to be withdrawn
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and covers essential requirements of
EC Directive (2004/108/EC). See Annex ZZ.
Annexes ZA and ZZ have been added by CENELEC.
__________
- 3 - EN 61812-1:2011
Endorsement notice
The text of the International Standard IEC 61812-1:2011 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60060-1:2010 NOTE Harmonized as EN 60060-1:2010 (not modified).
IEC 60068-2-78:2001 NOTE Harmonized as EN 60068-2-78:2001 (not modified).
IEC 60664-4:2005 NOTE Harmonized as EN 60664-4:2006 (not modified).
IEC 60669-2-3:2006 NOTE Harmonized as EN 60669-2-3:2006 (not modified).
IEC 60721-3-3:1994 NOTE Harmonized as EN 60721-3-3:1995 (not modified).
IEC 60730-2-7:2008 NOTE Harmonized as EN 60730-2-7:2010 (modified).
IEC 60947-1:2007 NOTE Harmonized as EN 60947-1:2007 (not modified).
IEC 60947-5-1:2003 NOTE Harmonized as EN 60947-5-1:2004 (not modified).
IEC 61180-1:1992 NOTE Harmonized as EN 61180-1:1994 (not modified).
__________
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
IEC 60050-444 2002 International Electrotechnical Vocabulary - - -
Part 444: Elementary relays
IEC 60050-445 2010 International Electrotechnical Vocabulary - - -
Part 445: Time relays
IEC 60068 Series Environmental testing EN 60068 Series
IEC 60068-2-2 2007 Environmental testing - EN 60068-2-2 2007
Part 2-2: Tests - Test B: Dry heat
IEC 60068-2-6 2007 Environmental testing - EN 60068-2-6 2008
Part 2-6: Tests - Test Fc: Vibration
(sinusoidal)
IEC 60068-2-27 2008 Environmental testing - EN 60068-2-27 2009
Part 2-27: Tests - Test Ea and guidance:
Shock
IEC 60085 2007 Electrical insulation - Thermal evaluation and EN 60085 2008
designation
IEC 60112 2003 Method for the determination of the proof and EN 60112 2003
the comparative tracking indices of solid
insulating materials
IEC 60529 1989 Degrees of protection provided by enclosures EN 60529 1991
(IP Code) + corr. May 1993
IEC 60664 Series Insulation coordination for equipment within EN 60664-1 Series
low-voltage systems
IEC 60664-1 2007 Insulation coordination for equipment within EN 60664-1 2007
low-voltage systems -
Part 1: Principles, requirements and tests
IEC 60664-3 2003 Insulation coordination for equipment within EN 60664-3 2003
low-voltage systems -
Part 3: Use of coating, potting or moulding for
protection against pollution
IEC 60664-5 2007 Insulation coordination for equipment within EN 60664-5 2007
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 - EN 60695-2-11 2001
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 - EN 60695-10-2 2003
Part 10-2: Abnormal heat - Ball pressure test
- 5 - EN 61812-1:2011
Publication Year Title EN/HD Year
IEC 60947-5-4 2002 Low-voltage switchgear and controlgear - EN 60947-5-4 2003
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 EN 60999-1 2000
conductors - Safety requirements for screw-
type and screwless-type clamping units -
Part 1: General requirements and particular
requirements for clamping units for conductors
from 0,2 mm² up to 35 mm² (included)
IEC 61000-4-2 2008 Electromagnetic compatibility (EMC) - EN 61000-4-2 2009
Part 4-2: Testing and measurement
techniques - Electrostatic discharge immunity
test
IEC 61000-4-3 2006 Electromagnetic compatibility (EMC) - EN 61000-4-3 2006
Part 4-3: Testing and measurement
techniques - Radiated, radio-frequency,
electromagnetic field immunity test
IEC 61000-4-4 2004 Electromagnetic compatibility (EMC) - EN 61000-4-4 2004
Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst
immunity test
IEC 61000-4-5 2005 Electromagnetic compatibility (EMC) - EN 61000-4-5 2006
Part 4-5: Testing and measurement
techniques - Surge immunity test
IEC 61000-4-6 2008 Electromagnetic compatibility (EMC) - EN 61000-4-6 2009
Part 4-6: Testing and measurement
techniques - Immunity to conducted
disturbances, induced by radio-frequency
fields
IEC 61000-4-8 2009 Electromagnetic compatibility (EMC) - EN 61000-4-8 2010
Part 4-8: Testing and measurement
techniques - Power frequency magnetic field
immunity test
IEC 61000-4-11 2004 Electromagnetic compatibility (EMC) - EN 61000-4-11 2004
Part 4-11: Testing and measurement
techniques - Voltage dips, short interruptions
and voltage variations immunity tests
IEC 61210 (mod) 2010 Connecting devices - Flat quick-connect EN 61210 2010
terminations for electrical copper conductors -
Safety requirements
IEC 61810-1 2008 Electromechanical elementary relays - EN 61810-1 2008
Part 1: General requirements
IEC 61984 2008 Connectors - Safety requirements and tests EN 61984 2009
IEC 62314 2006 Solid-state relays EN 62314 2006
CISPR 11 (mod) 2009 Industrial, scientific and medical equipment - EN 55011 2009
+ A1 2010 Radio-frequency disturbance characteristics - + A1 2010
Limits and methods of measurement
CISPR 22 (mod) 2008 Information technology equipment - Radio EN 55022 2010
disturbance characteristics - Limits and
methods of measurement
___________
Annex ZZ
(informative)
Coverage of Essential Requirements of EC Directives
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and within its scope the standard covers all
relevant essential requirements as given in Article 1 of Annex I of EC Directive 2004/108/EC.
Compliance with this standard provides one means of conformity with the specified essential
requirements of the Directive concerned.
WARNING: Other requirements and other EC Directives may be applicable to the products falling within
the scope of this standard.
___________
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
– 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
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
– 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
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
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
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
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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.
– 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.
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
– 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 – Electrostatic discharge immunity test
IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) – Part 4-3: Testing and
measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-4:2004, Electromagnetic compatibility (EMC) – Part 4-4: Testing and
measurement techniques – Electrical fast transient/burst immunity test
IEC 61000-4-5:2005, Electromagnetic compatibility (EMC) – Part 4-5: Testing and
measurement techniques – Surge immunity test
IEC 61000-4-6:2008, Electromagnetic compatibility (EMC) – Part 4-6: Testing and
measurement techniques – Immunity to conducted disturbances, induced by radio-frequency
fields
IEC 61000-4-8:2009, Electromagnetic compatibility (EMC) – Part 4-8: Testing and
measurement techniques – Power frequency magnetic field immunity test
IEC 61000-4-11:2004, Electromagnetic compatibility (EMC) – Part 4-11: Testing and
measurement techniques – Voltage dips, short interruptions and voltage variations immunity
tests
IEC 61210:2010, Connecting devices – Flat quick-connect terminations for electrical copper
conductors – Safety requirements
IEC 61810-1:2008, Electromechanical elementary relays – Part 1: General requirements
IEC 61984:2008, Connectors – Safety requirements and tests
IEC 62314:2006, Solid-state relays
CISPR 11:2009, Industrial, scientific and medical equipment – Radio-frequency disturbance
characteristics – Limits and methods of measurement
Amendment 1 (2010)
CISPR 22:2008, Information technology equipment – Radio disturbance characteristics –
Limits and methods of measurement
61812-1 IEC:2011 – 9 –
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-444 and
IEC 60050-445, as well as the following apply.
NOTE Terms having the same or nearly the same meaning are printed in boldface on separate lines and can be
used as an alternative.
3.1 Terms and definitions related to general terms
3.1.1
time relay
specified-time relay
all-or-nothing relay (IEC 60050-444:2002, 444-01-02) with one or more time functions
[IEC 60050-445:2010, 445-01-01 modified]
3.1.2
specified time
specified characteristic of a time relay at given type of function, e.g. operate time, release
time, pulse on time, interval time
[IEC 60050-445:2010, 445-05-01]
3.1.3
setting accuracy
difference between the measured value of the specified time and the reference value set on
the scale
NOTE For analogue setting this value relates to the maximum setting value.
[IEC 60050-445:2010, 445-06-07]
3.1.4
effect of influence (on specified time)
degree with which the influence quantity within its nominal range has an effect on the
specified time
[IEC 60050-445:2010, 445-06-02]
3.1.5
recovery time
minimum time interval for which the power supply is removed or control signal is applied or
removed before the specified function can be performed again
[IEC 60050-445:2010, 445-05-04]
3.1.6
minimum control impulse time
shortest duration of the power supply or control signal to fulfil the specified function
[IEC 60050-445:2010, 445-05-02]
3.1.7
repeatability
difference between the upper and lower limits of the specified confidence range determined
from several time measurements of a time relay under identical conditions
NOTE Preferably the repeatability is indicated as a percentage of the mean value of all measured values.
[IEC 60050-445:2010, 445-06-08]
– 10 – 61812-1 IEC:2011
3.1.8
power supply
energizing quantity
electrical quantity (e.g. electric current, voltage) which has to be applied or removed from the
input circuit of the time relay in order to enable it to fulfil its purpose
[IEC 60050-445:2010, 445-03-01]
3.1.9
input voltage
input current
electrical quantity that can be applied (or removed) to the power supply and to the control
signal
3.1.10
control signal
trigger signal (deprecated)
input signal which has to be applied or removed in addition to the power supply in order to
ensure a function of the time relay
NOTE The control signal is provided by a separate device designed to close or open an electrical circuit.
[IEC 60050-445:2010, 445-02-05]
3.1.11
conditional short-circuit current of an output circuit
prospective electric current that a contact circuit, protected by a specified short-circuit
protective device, can satisfactorily withstand for the total breaking time of that protective
device under specified conditions of use and behaviour
[IEC 60050-445:2010, 445-04-03]
3.1.12
on-state voltage drop of a solid-state output circuit
voltage drop of a solid-state output circuit (deprecated)
voltage measured across the effectively conducting solid-state output of a time relay, when
carrying the given load current
[IEC 60050-445:2010, 445-04-04]
3.1.13
leakage current of a solid-state output
off-state current of a solid-state output (deprecated)
electric current which flows through the effectively non-conducting solid-state output of a time
relay at a specified voltage
[IEC 60050-445:2010, 445-04-05]
3.1.14
power port
point at which the supply voltage (either a.c. or d.c.) is connected to the time relay
[IEC 60050-445:2010, 445-07-01]
3.1.15
control port
additional port for the starting of functions whilst supply voltage is applied, or for the
connection of a remote potentiometer, control signal, etc.
NOTE There are control ports for floating (potential-free) and non-floating control.
61812-1 IEC:2011 – 11 –
[IEC 60050-445:2010, 445-07-02]
3.1.16
output port
port at which a load is connected to the time relay
NOTE The output port could consist of electromechanical contacts or be a solid-state output.
[IEC 60050-445:2010, 445-07-03]
3.1.17
enclosure port
physical boundary of the time relay through which electromagnetic fields can radiate or
impinge
[IEC 60050-445:2010, 445-07-04]
NOTE See Figure 1.
Enclosure port
Power port Output port
Time relay
Control port
(if any)
IEC 792/11
Figure 1 – Definition of ports
3.2 Terms and definitions of relay types
Key
Power supply
Control signal
T Setting time
Make contact
IEC 793/11
Figure 2 – Definition of symbols
3.2.1
power on-delay relay
on-delay relay
time relay in which the time delay starts when applying the power supply and the output
switches to the operate condition after the setting time has elapsed (see Figure 2 and
Figure 3)
– 12 – 61812-1 IEC:2011
T
Time
IEC 794/11
Figure 3 – Power on-delay relay
[IEC 60050-445:2010, 445-01-02]
3.2.2
power off-delay relay
true off-delay relay
time relay in which the output immediately switches to the operate condition when applying
the power supply; the time delay starts when the power supply is removed; the output
switches to the release condition after the setting time has elapsed (see Figure 2 and
Figure 4)
T
Time
IEC 795/11
Figure 4 – Power off-delay relay
[IEC 60050-445:2010, 445-01-03]
3.2.3
off-delay relay with control signal
off-delay relay
time relay in which the output immediately switches to the operate condition when applying
the power supply and the control signal; the time delay starts when removing the control
signal, and the output switches to the release condition after the setting time has elapsed
(see Figure 2 and Figure 5)
NOTE Effects of subsequent operating or resetting of the control signal should be declared by the manufacturer.
T
Time
IEC 796/11
Figure 5 – Off-delay relay with control signal
[IEC 60050-445:2010, 445-01-04]
61812-1 IEC:2011 – 13 –
3.2.4
on- and off-delay relay with control signal
time relay in which the output switches to the operate condition
...
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