EN 60947-8:2003
(Main)Low-voltage switchgear and controlgear - Part 8: Control units for built-in thermal protection (PTC) for rotating electrical machines
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 EN 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 EN 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
Spécifie les règles pour les unités de commande, qui réalisent les fonctions de commutation en réponse aux détecteurs thermiques incorporés aux machines électriques tournantes selon la EN 60034-11, et l'application industrielle. Elle spécifie les règles pour ce type de dispositif comprenant un détecteur à thermistance à coefficient de température positif (CTP) ayant des caractéristiques particulières, et son unité de commande associée. Les détecteurs PT100 sont couverts par la EN 60751, où les valeurs de résistance sont données selon les températures du détecteur. Les présentes règles fixent les caractéristiques de l'association de ce détecteur à thermistance à coefficient de température positif particulier et de son unité de commande associée (désignés par "Détecteur A" et "Unité de commande A"), lorsqu'ils sont utilisés dans des dispositifs de protection thermique. NOTE Il n'est pas possible de spécifier toutes les prescriptions pour les caractéristiques de fonctionnement d'une unité de commande, puisqu'elles sont dépendantes de certains aspects des détecteurs thermiques. Certains aspects des prescriptions du dispositif de protection thermique peuvent seulement être spécifiés lorsque sont pris en compte les caractéristiques de la machine tournante à protéger et le mode d'installation du détecteur dans la machine. Pour ces raisons, il est nécessaire de spécifier, pour chaque caractéristique, qui est responsable de la déclaration des valeurs requises et qui est responsable de la conformité aux prescriptions et de l'exécution de tout essai de vérification de la conformité.
Nizkonapetostne stikalne naprave – 8. del: Krmilne enote za vgrajeno toplotno zaščito (PTC) rotacijskih električnih strojev (IEC 60947-8:2003)
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
- 17-Jul-2003
- Withdrawal Date
- 30-Jun-2006
- 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
- 18-Jul-2003
- Completion Date
- 18-Jul-2003
Relations
- Effective Date
- 16-Apr-2019
- Effective Date
- 28-Jan-2023
- Effective Date
- 28-Jan-2023
Overview - EN 60947-8:2003 (PTC control units)
EN 60947-8:2003 (CLC adoption of IEC 60947-8:2003) is a European standard within the low-voltage switchgear and controlgear series. It specifies rules for control units that respond to built-in thermal detectors (PTC thermistors) used for thermal protection of rotating electrical machines. The standard defines the characteristics and the required association between a particular PTC detector (designated Mark A) and its associated Mark A control unit, laying out how the detector and control unit together perform switching functions to protect motors from overheating.
Key topics and requirements
- Scope of protection: Rules for thermal protection systems that use positive temperature coefficient (PTC) thermistor detectors incorporated in rotating machines per EN 60034-11.
- Detector - control unit association: Characteristics and behaviour of the Mark A detector and Mark A control unit when used as a matched system.
- Complementary detectors: Reference to other sensor types (e.g., PT100 covered by EN 60751) and to thermistor specifications (IEC/EN 60738-1).
- Standards integration: This Part 8 is to be used in conjunction with EN 60947-1 (general rules) and references EMC and functional test standards (IEC/EN 61000 series, CISPR).
- Responsibility allocation: The standard notes that many operating characteristics depend on detector type, machine characteristics and installation method - therefore it specifies who must state required values and who must verify compliance or perform confirmatory tests.
- Normative/informative annexes: Annexes A, B and ZA are normative; Annex C is informative.
Practical applications and users
EN 60947-8:2003 is directly applicable to:
- Motor manufacturers and OEMs specifying built-in thermal protection.
- Control-panel and switchgear designers integrating PTC-based motor protection.
- Electrical installation engineers and maintenance teams responsible for motor safety and compliance.
- Test laboratories and conformity assessors verifying detector-control unit performance and EMC immunity.
- Specifiers developing motor protection schemes for industrial applications (pumps, compressors, conveyors, HVAC motors).
Using EN 60947-8 helps ensure consistent, interoperable implementations of PTC thermal protection and clear assignment of responsibilities for specification and testing.
Related standards (important cross-references)
- EN 60947-1 - Low-voltage switchgear and controlgear, Part 1: General rules
- EN/IEC 60034-11 - Rotating electrical machines - Built-in thermal protection
- EN 60751 - Industrial platinum resistance thermometers (PT100)
- EN 60738-1 - Thermistors (PTC step-function)
- IEC/EN 61000 series and CISPR - EMC testing and immunity
Keywords: EN 60947-8:2003, PTC control units, built-in thermal protection, rotating electrical machines, low-voltage switchgear, Mark A detector, motor protection, EN 60034-11.
Frequently Asked Questions
EN 60947-8:2003 is a standard published by CLC. Its full title is "Low-voltage switchgear and controlgear - Part 8: Control units for built-in thermal protection (PTC) for rotating electrical machines". This standard covers: Specifies rules for control units, which perform the switching functions in response to the thermal detectors incorporated in rotating electrical machines according to EN 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 EN 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.
Specifies rules for control units, which perform the switching functions in response to the thermal detectors incorporated in rotating electrical machines according to EN 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 EN 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.
EN 60947-8:2003 is classified under the following ICS (International Classification for Standards) categories: 29.130.20 - Low voltage switchgear and controlgear. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 60947-8:2003 has the following relationships with other standards: It is inter standard links to EN IEC 60947-8:2023, EN 60947-8:2003/A1:2006, EN 60947-8:2003/A2:2012. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 60947-8:2003 is associated with the following European legislation: EU Directives/Regulations: 2004/108/EC, 2004/108/EU, 2006/95/EC, 2014/30/EU, 2014/35/EU, 2014/53/EU, 73/23/EEC, 89/336/EEC; Standardization Mandates: M/404. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
You can purchase EN 60947-8:2003 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CLC standards.
Standards Content (Sample)
SLOVENSKI SIST EN 60947-8:2003
STANDARD
december 2003
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Low-voltage switchgear and controlgear - Part 8: Control units for built-in thermal
protection (PTC) for rotating electrical machines (IEC 60947-8:2003)
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EUROPEAN STANDARD EN 60947-8
NORME EUROPÉENNE
EUROPÄISCHE NORM July 2003
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)
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) (IEC 60947-8:2003)
This European Standard was approved by CENELEC on 2003-07-01. 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, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and 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
© 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60947-8:2003 E
Foreword
The text of document 17B/1276/FDIS, future edition 1 of IEC 60947-8, 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 EN 60947-8 on 2003-07-01.
This Part 8 shall be used in conjunction with EN 60947-1. The provisions of the general rules dealt with
in EN 60947-1 are applicable to this standard, where specifically called for. Clauses and subclauses,
tables, figures and annexes thus applicable are identified by reference to "IEC 60947-1", e.g. 1.2.3 of
IEC 60947-1, Table 4 of IEC 60947-1 or Annex A of IEC 60947-1.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2004-04-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2006-07-01
Annexes designated "normative" are part of the body of the standard.
Annexes designated "informative" are given for information only.
In this standard, annexes A, B and ZA are normative and annex C is informative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of t
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