EN 60947-8:2003/A1:2006

Low-voltage switchgear and controlgear - Part 8: Control units for built-in thermal protection (PTC) for rotating electrical machines

Specifies rules for control units, which perform the switching functions in response to the thermal detectors incorporated in rotating electrical machines according to IEC 60034-11, and the industrial application. It specifies rules for that type of system comprising a positive temperature coefficient (PTC) thermistor detector having particular characteristics, and its associated control unit. The PT100 detectors are covered by IEC 60751, where the resistor values are given according to the temperatures of the detector. The present rules lay down the characteristics of association of this particular positive temperature coefficient thermistor detector and its associated control unit (designated "Mark A detector"" and "Mark A control unit""), when they are used in thermal protection systems. NOTE It is not possible to specify all the requirements for the operating characteristics of a control unit, as they are dependent on some aspects of the thermal detectors. Some aspects of the requirements of the thermal protector system can only be specified when account is taken of the characteristics of the rotating machine to be protected and the method of installation of the detector within the machine. For these reasons, for each characteristic it is necessary to specify who is responsible for stating the required values and who is responsible for compliance with the requirement and for carrying out any confirmatory test.

Niederspannungsschaltgeräte - Teil 8: Auslösegeräte für den eingebauten thermischen Schutz (PTC) von rotierenden elektrischen Maschinen

Appareillage à basse tension - Partie 8: Unités de commande pour la protection thermique incorporée (CTP) aux machines électriques tournantes

Nizkonapetostne stikalne naprave – 8. del: Krmilne enote za vgrajeno toplotno zaščito (PTC) rotacijskih električnih strojev (IEC 60947-8:2003/A1:2006))

Določa pravila za krmilne enote, ki opravljajo stikalne funkcije kot odziv na toplotne detektorje, vgrajene v rotacijske električne stroje v skladu s standardom IEC 60034-11, in industrijsko uporabo. Določa pravila za to vrsto sistema s termistorskim detektorjem s pozitivnim temperaturnim koeficientom (PTC) s posebnimi značilnostmi in z njim povezano krmilno enoto. Detektorji PT100 so zajeti v standardu IEC 60751, pri čemer so vrednosti upora podane v skladu s temperaturami detektorja. Ta pravila določajo značilnosti povezave tega termistorskega detektorja s pozitivnim temperaturnim koeficientom in z njim povezane krmilne enote (pri čemer sta označena kot »detektor z oznako A« in »krmilna enota z oznako A«), kadar se uporabljata v toplotnih zaščitnih sistemih. OPOMBA Vseh zahtev za obratovalne značilnosti krmilne enote ni mogoče določiti, saj so odvisne od nekaterih vidikov toplotnih detektorjev. Nekatere vidike zahtev toplotnega zaščitnega sistema je mogoče določiti le ob upoštevanju značilnosti rotacijskega stroja, ki bo zaščiten, in metode vgradnje detektorja v stroj. Zato je treba za vsako značilnost določiti, kdo je odgovoren za navedbo zahtevanih vrednosti, skladnost z zahtevo in izvedbo morebitnih potrditvenih preskusov.

General Information

• Status: Published
• Publication Date: 16-Nov-2006
• Withdrawal Date: 30-Sep-2009
• ICS: 29.130.20 - Low voltage switchgear and controlgear
• Technical Committee: CLC/TC 121A - Low-voltage switchgear and controlgear
• Drafting Committee: IEC/SC 121A - Low-voltage switchgear and controlgear
• Parallel Committee: IEC/SC 17B - IEC_SC_17B
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 17-Nov-2006
• Completion Date: 17-Nov-2006
• Directive: 2004/108/EC - Directive 2004/108/EC of the European Parliament and of the Council of 15 December 2004 on the approximation of the laws of the Member States relating to electromagnetic compatibility and repealing Directive 89/336/EEC
• Directive: 2004/108/EU - DIRECTIVE 2004/108/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 15 December 2004 on the approximation of the laws of the Member States relating to electromagnetic compatibility and repealing Directive 89/336/EEC
• Directive: 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)
• Directive: 2014/30/EU - Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility (recast)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Directive: 2014/53/EU - Directive 2014/53/EU of The European Parliament and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC
• Directive: 73/23/EEC - Electrical equipment designed for use within certain voltage limits
• Directive: 89/336/EEC - Electromagnetic compatibility (EMC)
• Mandate: M/404 - Standardisation Mandate to CEN, CENELEC and ETSI for harmonized standard according to the Electro Magnetic Compatibility (EMC) Directive 2004/108/EC
• Ref Project: SIST EN 60947-8:2003/A1:2007 - Low-voltage switchgear and controlgear -- Part 8: Control units for built-in thermal protection (PTC) for rotating electrical machines

Relations

• Replaced By: EN IEC 60947-8:2023 - Low-voltage switchgear and controlgear - Part 8: Control units for built-in thermal protection (PTC) for rotating electrical machines
• Effective Date: 20-Feb-2023
• Amends: EN 60947-8:2003 - Low-voltage switchgear and controlgear - Part 8: Control units for built-in thermal protection (PTC) for rotating electrical machines
• Effective Date: 28-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2007
1L]NRQDSHWRVWQHVWLNDOQHQDSUDYH±GHO.UPLOQHHQRWH]DYJUDMHQRWRSORWQR
]DãþLWR37&URWDFLMVNLKHOHNWULþQLKVWURMHY,(&$
Low-voltage switchgear and controlgear -- Part 8: Control units for built-in thermal
protection (PTC) for rotating electrical machines (IEC 60947-8:2003/A1:2006)
Niederspannungsschaltgeräte -- Teil 8: Auslösegeräte für den eingebauten thermischen
Schutz (PTC) von rotierenden elektrischen Maschinen (IEC 60947-8:2003/A1:2006)
Appareillage a basse tension -- Partie 8: Unités de commande pour la protection
thermique incorporée (CTP) aux machines électriques tournantes (IEC 60947-
8:2003/A1:2006)
Ta slovenski standard je istoveten z: EN 60947-8:2003/A1:2006
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 60947-8/A1
NORME EUROPÉENNE
November 2006
EUROPÄISCHE NORM
ICS 29.130.20
English version
Low-voltage switchgear and controlgear
Part 8: Control units for built-in thermal protection (PTC)
for rotating electrical machines
(IEC 60947-8:2003/A1:2006)
Appareillage à basse tension  Niederspannungsschaltgeräte
Partie 8: Unités de commande pour la Teil 8: Auslösegeräte für den eingebauten
protection thermique incorporée (CTP) thermischen Schutz (PTC) von
aux machines électriques tournantes rotierenden elektrischen Maschinen
(CEI 60947-8:2003/A1:2006) (IEC 60947-8:2003/A1:2006)

This amendment A1 modifies the European Standard EN 60947-8:2003; it was approved by CENELEC on
2006-10-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this amendment 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 amendment 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, 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

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60947-8:2003/A1:2006 E

Foreword
The text of document 17B/1477/FDIS, future amendment 1 to IEC 60947-8:2003, prepared by SC 17B,
Low-voltage switchgear and controlgear, of IEC TC 17, Switchgear and controlgear, was submitted to the
IEC-CENELEC parallel vote and was approved by CENELEC as amendment A1 to EN 60947-8:2003 on
2006-10-01.
The following dates were fixed:
– latest date by which the amendment has to be
implemented at national level by publication of
(dop) 2007-07-01
an identical national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2009-10-01
with the amendment have to be withdrawn
__________
Endorsement notice
The text of amendment 1:2006 to the International Standard IEC 60947-8:2003 was approved by
CENELEC as an amendment to the European Standard without any modification.
__________
- 3 - EN 60947-8:2003/A1:2006
Replace Annex ZA of EN 60947-8:2003 by:
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 60034-11 2004 Rotating electrical machines EN 60034-11 2004
Part 11: Thermal protection
IEC 60068-2-6 1995 Environmental testing
+ corr. March 1995 Part 2: Tests - Test Fc: Vibration (sinusoidal) EN 60068-2-6 1995

IEC 60068-2-27 1987 Environmental testing EN 60068-2-27 1993
Part 2: Tests - Test Ea and guidance: Shock

IEC 60410 1973 Sampling plans and procedures for inspection - -
by attributes
IEC 60417 Data- Graphical symbols for use on equipment - -
base
1)
IEC 60738-1 1998 Thermistors - Directly heated positive EN 60738-1 1999
step-function temperature coefficient
Part 1: Generic specification
IEC 60751 1983 Industrial platinum resistance thermometer
+ A1 1986 sensors EN 60751 1995

A2 1995 A2 1995
IEC 60947-1 2004 Low-voltage switchgear and controlgear EN 60947-1 2004
Part 1: General rules + corr. November 2004

IEC 60947-5-1 2003 Low-voltage switchgear and controlgear EN 60947-5-1 2004
Part 5-1: Control circuit devices and + corr. July 2005
switching elements - Electromechanical
control circuit devices
IEC 61000-4-2 1995 Electromagnetic compatibility (EMC) EN 61000-4-2 1995
A1 1998 Part 4-2: Testing and measurement A1 1998
A2 2000 techniques - Electrostatic discharge immunity A2 2001
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

1)
EN 60738-1 is superseded by EN 60738-1:2006, which is based on IEC 60738-1:2006.

Publication Year Title EN/HD Year
2)
IEC 61000-4-4 1995 Electromagnetic compatibility (EMC) EN 61000-4-4 1995
A1 2000 Part 4-4: Testing and measurement A1 2001

A2 2001 techniques - Electrical fast transient/burst A2 2001
immunity test
3)
IEC 61000-4-5 1995 Electromagnetic compatibility (EMC) EN 61000-4-5 1995

A1 2000 Part 4-5: Testing and measurement A1 2001
techniques - Surge immunity test

IEC 61000-4-6 2003 Electromagnetic compatibility (EMC) - -
A1 2004 Part 4-6: Testing and measurement
A2 2006 techniques - Immunity to conducted
disturbances, induced by radio-frequency
fields
IEC 61000-4-8 1993 Electromagnetic compatibility (EMC) EN 61000-4-8 1993
A1 2000 Part 4-8: Testing and measurement A1 2001
techniques - Power frequency magnetic field
immunity test
IEC 61000-4-11 1994 Electromagnetic compatibility (EMC) EN 61000-4-11 1994
A1 2000 Part 4-11: Testing and measurement A1 2001
techniques - Voltage dips, short interruptions
and voltage variations immunity tests

IEC 61000-4-13 2002 Electromagnetic compatibility (EMC) EN 61000-4-13 2002
Part 4-13: Testing and measurement
techniques - Harmonics and interharmonics
including mains signalling at a.c. power port,
low frequency immunity tests
CISPR 11 2003 Industrial scientific and medical (ISM) radio-
4)
+ A1 (mod) 2004 frequency equipment - Electromagnetic EN 55011 200X
disturbance characteristics - Limits and
methods of measurement
CISPR 22 (mod) 2005 Information technology equipment - Radio EN 55022 2006
A1 2005 disturbance characteristics - Limits and
A2 2006 methods of measurement

2)
EN 61000-4-4 is superseded by EN 61000-4-4:2004, which is based on IEC 61000-4-4:2004.
3)
EN 61000-4-5 is superseded by EN 61000-4-5:2006, which is based on IEC 61000-4-5:2005.
4)
To be published.
INTERNATIONAL IEC
STANDARD 60947-8
AMENDMENT 1
2006-09
Amendment 1
Low-voltage switchgear and controlgear –
Part 8:
Control units for built-in thermal protection (PTC)
for rotating electrical machines

This English-language version is derived from the original
bilingual publication by leaving out all French-language
pages. Missing page numbers correspond to the French-
language pages.
© IEC 2006 Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical,
including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale K
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

60947-8 Amend. 1  IEC:2006 – 3 –
FOREWORD
This amendment has been prepared by subcommittee 17B: Low-voltage switchgear and
controlgear, of IEC technical committee 17: Switchgear and controlgear.
The text of this amendment is based on the following documents:
FDIS Report on voting
17B/1477/FDIS 17B/1504/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the maintenance result 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 3
CONTENTS
Modify the title of Clause 3 to read:
3 Terms, definitions, symbols and abbreviations
Insert the following:
3.1 Terms and definitions
3.2 Symbols and abbreviations
Delete the following:
Annex C (informative) Verification requirements in circumstances requiring short-circuit
detection in the sensor circuit

60947-8 Amend. 1  IEC:2006 – 5 –
Page 11
2 Normative references
Replace the reference to IEC 60034-11:1978 by the following:
IEC 60034-11:2004, Rotating electrical machines – Part 11: Thermal protection
Insert the following references:
IEC 60068-2-6:1995, Environmental testing – Part 2: Tests – Test Fc: Vibration (sinusoidal)
IEC 60068-2-27:1987, Environmental testing – Part 2: Tests – Test Ea and guidance: Shock
Replace the reference to IEC 60417-DB:2000 by the following:
IEC 60417:2002, Graphical symbols for use on equipment
Replace, on page 13, the reference to IEC 60947-1:1999 by the following:
IEC 60947-1:2004, Low-voltage switchgear and controlgear – Part 1: General rules
Replace, on page 13, the reference to IEC 60947-5-1:1997 by the following:
IEC 60947-5-1:2003, Low-voltage switchgear and controlgear – Part 5-1: Control circuit
devices and switching elements – Electromechanical control circuit devices
Replace, on page 13, the reference to IEC 61000-4-3:2002 by the following:
IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) - Part 4-3 : Testing and
measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test
Replace, on page 13, the reference to IEC 61000-4-6:1996 by the following:
IEC 61000-4-6:2003, Electromagnetic compatibility (EMC) – Part 4-6: Testing and
measurement techniques – Immunity to conducted disturbances, induced by radio-frequency
fields
Amendment 1 (2004)
Amendment 2 (2006)
Replace, on page 13, the reference to CISPR 11:1997 by the following:
CISPR 11:2003, Industrial, scientific and medical (ISM) radio-frequency equipment –
Electromagnetic disturbance characteristics – Limits and methods of measurement
Amendment 1 (2004)
Replace, on page 13, the reference to CISPR 22:1997 by the following:
CISPR 22:2005, Information technology equipment – Radio disturbance characteristics –
Limits and methods of measurement
Amendment 1 (2005)
Amendment 2 (2006)
60947-8 Amend. 1  IEC:2006 – 7 –
Page 15
3 Terms and definitions
Replace the existing title by the following:
3 Terms, definitions, symbols and abbreviations
Insert, after the first paragraph, the following new title and the new alphabetical index:
3.1 Terms and definitions
Reference
A
Abrupt characteristic change thermal detector . 3.1.14

B
Built-in thermal protection . 3.1.1

C
Category of thermal protection. 3.1.12
Characteristic variation thermal detector. 3.1.13
Control circuit . 3.1.16
Control system. 3.1.5
Control unit. 3.1.15
Control unit with dynamic wire break detection. 3.1.25
Control unit with short-circuit detection within the thermal detector circuit. 3.1.24

D
Detector operating temperature (TNF) . 3.1.17

E
Electrically separated contact elements . 3.1.20

M
Mark A control unit. 3.1.23
Mark A detector . 3.1.22
Maximum temperature after tripping. 3.1.11

P
Protected par
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