EN 60730-2-4:2007

Automatic electrical controls for household and similar use - Part 2-4: Particular requirements for thermal motor protectors for motor-compressors of hermetic and semi-hermetic type

This part of IEC 60730 applies to the partial evaluation of thermal motor protectors as defined in IEC 60730-1 for sealed (hermetic and semi-hermetic type) motor-compressors. A thermal motor protector is an integrated control which is dependent on its correct mounting and fixing in or on a motor and which can only be fully tested in combination with the relevant motor. Requirements concerning the testing of the combination of motor and thermal motor protectors are given in IEC 60335-2-34. This standard applies to thermal motor protectors for motor compressors using NTC or PTC thermistors, additional requirements for which are contained in Annex J.

Automatische elektrische Regel- und Steuergeräte für den Hausgebrauch und ähnliche Anwendungen - Teil 2-4: Besondere Anforderungen für thermische Motorschutzeinrichtungen für hermetisch und halbhermetisch gekapselte Motorverdichter

Dispositifs de commande électrique automatiques à usage domestique et analogue - Partie 2-4: Règles particulières pour les dispositifs thermiques de protection de moteurs pour motocompresseurs de type hermétique et semi hermétique

La présente partie de la CEI 60730 s'applique à l'évaluation partielle des dispositifs thermiques de protection de moteur tels que définis dans la CEI 60730-1, pour les motocompresseurs de type hermétique et semi hermétique. Un dispositif thermique de protection de moteur est un dispositif de commande intégré qui est dépendant de son bon montage et de sa fixation correcte dans ou sur un moteur et qui ne peut être complètement essayé qu'en association avec le moteur concerné. Les exigences concernant les essais de la combinaison du moteur et du dispositif thermique de protection de moteur sont données dans la CEI 60335-2-34. La présente norme s'applique aux dispositifs thermiques de protection de moteur pour motocompresseurs utilisant des thermistances CTN ou CTP dont les exigences complémentaires sont contenues à l'Annexe J.

Avtomatska električna krmilja za uporabo v gospodinjstvu in za podobno uporabo - 2-4. del: Posebne zahteve za motorne kompresorje hermetičnega ali polhermetičnega tipa (IEC 60730-2-4:2006, spremenjen)

General Information

• Status: Published
• Publication Date: 29-Nov-2007
• ICS: 97.120 - Automatic controls for household use
• Technical Committee: CLC/TC 72 - Automatic controls for household use
• Drafting Committee: IEC/TC 72 - IEC_TC_72
• Parallel Committee: IEC/TC 72 - IEC_TC_72
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 30-Nov-2007
• Completion Date: 30-Nov-2007
• 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: 2014/35/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)
• Ref Project: SIST EN 60730-2-4:2008 - Automatic electrical controls for household and similar use -- Part 2-4: Particular requirements for thermal motor protectors for motor-compressors of hermetic and semi-hermetic type

Relations

• Replaces: EN 60730-2-4:1993 - Automatic electrical controls for household and similar use - Part 2-4: Particular requirements for thermal motor protectors for motor-compressors of hermetic and semi-hermetic type
• Effective Date: 13-May-2010
• Revised: EN 60730-2-4:1993/A2:2002 - Automatic electrical controls for household and similar use - Part 2-4: Particular requirements for thermal motor protectors for motor-compressors of hermetic and semi-hermetic type
• Effective Date: 07-Sep-2010
• Revised: EN 60730-2-4:1993/A1:1998 - Automatic electrical controls for household and similar use - Part 2-4: Particular requirements for thermal motor protectors for motor-compressors of hermetic and semi-hermetic type
• Effective Date: 07-Sep-2010
• Replaces: EN 60730-2-4:1993/A1:1998 - Automatic electrical controls for household and similar use - Part 2-4: Particular requirements for thermal motor protectors for motor-compressors of hermetic and semi-hermetic type
• Effective Date: 07-Jun-2022
• Replaces: EN 60730-2-4:1993/A2:2002 - Automatic electrical controls for household and similar use - Part 2-4: Particular requirements for thermal motor protectors for motor-compressors of hermetic and semi-hermetic type
• Effective Date: 07-Jun-2022

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Automatic electrical controls for household and similar use - Part 2-4: Particular requirements for thermal motor protectors for motor-compressors of hermetic and semi-hermetic typeOLDispositifs de commande électrique automatiques a usage domestique et analogue - Partie 2-4: Regles particulieres pour les dispositifs thermiques de protection de moteurs pour motocompresseurs de type hermétique et semi hermétiqueAutomatische elektrische Regel- und Steuergeräte für den Hausgebrauch und ähnliche Anwendungen - Teil 2-4: Besondere Anforderungen für thermische Motorschutzeinrichtungen für hermetisch und halbhermetisch gekapselte MotorverdichterTa slovenski standard je istoveten z:EN 60730-2-4:2007SIST EN 60730-2-4:2008en,fr,de97.120ICS:SIST EN 60730-2-4:1995/A2:2003SIST EN 60730-2-4:1995/A1:1999SIST EN 60730-2-4:19951DGRPHãþDSLOVENSKI
STANDARDSIST EN 60730-2-4:200801-maj-2008







EUROPEAN STANDARD EN 60730-2-4 NORME EUROPÉENNE
EUROPÄISCHE NORM November 2007
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
© 2007 CENELEC -
All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60730-2-4:2007 E
ICS 97.120 Supersedes EN 60730-2-4:1993 + A1:1998 + A2:2002
English version
Automatic electrical controls for household and similar use -
Part 2-4: Particular requirements for thermal motor protectors
for motor-compressors of hermetic and semi-hermetic type (IEC 60730-2-4:2006, modified)
Dispositifs de commande électrique automatiques à usage domestique
et analogue -
Partie 2-4: Règles particulières
pour les dispositifs thermiques
de protection de moteurs
pour motocompresseurs de type hermétique et semi hermétique (CEI 60730-2-4:2006, modifiée)
Automatische elektrische
Regel- und Steuergeräte
für den Hausgebrauch
und ähnliche Anwendungen -
Teil 2-4: Besondere Anforderungen
für thermische Motorschutzeinrichtungen für hermetisch und halbhermetisch gekapselte Motorverdichter
(IEC 60730-2-4:2006, modifiziert)
This European Standard was approved by CENELEC on 2007-09-01. 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, Bulgaria, 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.



EN 60730-2-4:2007 - 2 - Foreword The text of the International Standard IEC 60730-2-4:2006, prepared by IEC TC 72, Automatic controls for household use, together with the common modifications prepared by the Technical Committee CENELEC TC 72, Automatic controls for household use, was submitted to the formal vote and was approved by CENELEC as EN 60730-2-4 on 2007-09-01. This European Standard supersedes EN 60730-2-4:1993 + corrigendum March 2001 + A1:1998 + corrigendum March 2001 + A2:2002. 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)
2008-09-01 – latest date by which the national standards conflicting with the EN have to be withdrawn
(dow)
2010-09-01 This Part 2-4 is to be used in conjunction with EN 60730-1:2000 + A1:2004, Automatic electrical controls for household and similar use – Part 1: General requirements, and any subsequent amendments. This Part 2-4 supplements or modifies the corresponding clauses in EN 60730-1 so as to convert that publication into the European Standard: Particular requirements for thermal motor protectors for motor-compressors or hermetic and semi-hermetic type. Where this Part 2-4 states "addition", "modification" or "replacement", the relevant requirement, test specification or explanatory matter in Part 1 shall be adapted accordingly. Where no change is necessary, this Part 2-4 indicates that the relevant clause or subclause applies. In this publication, the following print types are used: – Requirements proper: in roman type. – Test specifications: in italic type. – Explanatory matter: in smaller roman type. Subclauses, notes, items or figures which are additional to those in Part 1 are numbered starting from 101, additional annexes are lettered AA, BB, etc. __________



- 3 - EN 60730-2-4:2007 Endorsement notice
The text of the International Standard IEC 60730-2-4:2006 was approved by CENELEC as a European Standard with agreed common modifications as given below. COMMON MODIFICATIONS
6.101 According to limited short-circuit capability (applicable in Canada and the USA) Delete the text and replace with “Void”.
7 Information
In Table 7.2 delete item 101 and its note and replace both with “Void”.
12 Moisture and dust resistance
Replace the text with “This clause of Part 1 is applicable”.
12.2 Protection against humid conditions
Delete this subclause.
17 Endurance
17.2 Limited short-circuit capability for thermal protectors classified under 6.101 (applicable in Canada and USA) Delete this subclause (including Table 7.2) and replace with “Void”. 18 Mechanical strength 18.1.3.101.2
Delete the last sentence “In Canada and the USA, higher or lower test pressures than the values specified in 18.1.3.101.1 and 18.1.3.101.2 are required.” 20 Creepage distances, clearances and distances through solid insulation
Delete Subclauses 20.1, 20.2, 20.3, 20.3.1 and Table 20.3.101 and replace with “Void”.
Annex C
Cotton used for mercury switch test
Delete this annex.



EN 60730-2-4:2007 - 4 - 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.
Addition to Annex ZA of EN 60730-1: Publication Year Title EN/HD Year
IEC 60269-1 -1) Low-voltage fuses -
Part 1: General requirements EN 60269-1 20072)
IEC 60269-3 (mod) -1) Low-voltage fuses -
Part 3: Supplementary requirements for fuses for use by unskilled persons (fuses mainly for household or similar applications) - Examples of standardized systems of fuses A to F HD 60269-3 20072)
IEC 60335-2-34 2002 Household and similar electrical appliances - Safety -
Part 2-34: Particular requirements for motor-compressors EN 60335-2-34 + A11 2002 2004
1) Undated reference. 2) Valid edition at date of issue.



NORME INTERNATIONALECEIIEC INTERNATIONAL STANDARD 60730-2-4Deuxième éditionSecond edition2006-10 Dispositifs de commande électrique
automatiques à usage domestique et analogue – Partie 2-4: Règles particulières pour les dispositifs thermiques de protection de moteur pour motocompresseurs de type hermétique et
semi hermétique
Automatic electrical controls
for household and similar use – Part 2-4: Particular requirements for thermal motor protectors for motor-compressors of hermetic
and semi-hermetic type Pour prix, voir catalogue en vigueur For price, see current catalogue© IEC 2006
Droits de reproduction réservés
⎯
Copyright - all rights reserved Aucune partie de cette publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit de l'éditeur. 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, SwitzerlandTelephone: [phone] Telefax: [phone] E-mail: [e-mail]
Web: www.iec.ch CODE PRIX PRICE CODE S Commission Electrotechnique InternationaleInternational Electrotechnical Commission



60730-2-4 © IEC:2006 – 3 –
CONTENTS FOREWORD.5
1 Scope and normative references.11 2 Definitions.13 3 General requirements.15 4 General notes on tests.15 5 Rating.15 6 Classification.15 7 Information.17 8 Protection against electric shock.19 9 Provision for protective earthing.19 10 Terminals and terminations.21 11 Constructional requirements.21 12 Moisture and dust resistance.21 13 Electric strength and insulation resistance.23 14 Heating.23 15 Manufacturing deviation and drift.23 16 Environmental stress.23 17 Endurance.23 18 Mechanical strength.29 19 Threaded parts and connections.31 20 Creepage distances, clearances and distances through solid insulation.31 21 Resistance to heat, fire and tracking.35 22 Resistance to corrosion.35 23 Electromagnetic compatibility (EMC) requirements – emission.35 24 Components.35 25 Normal operation.35 26 Electromagnetic compatibility (EMC) requirements – immunity.35 27 Abnormal operation.35 28 Guidance on the use of electronic disconnection.35
Annexes.37 Annex C (normative)
Cotton used for mercury switch test.37 Annex E (normative)
Circuit for measuring leakage current.37 Annex AA (informative)
Endurance test for thermal motor protectors as components,
i.e. not installed on a motor.39



60730-2-4 © IEC:2006 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________
AUTOMATIC ELECTRICAL CONTROLS FOR
HOUSEHOLD AND SIMILAR USE –
Part 2-4: Particular requirements for thermal motor protectors
for motor-compressors of hermetic and semi-hermetic type
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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 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 60730-2-4 has been prepared by IEC technical committee 72: Automatic controls for household use. This second edition cancels and replaces the first edition published in 1990, Amendment 1 (1994) and Amendment 2 (2001).
This second edition constitutes a technical revision and updates the standard to current practices as well as to the applicable horizontal standards.



60730-2-4 © IEC:2006 – 7 –
The text of this standard is based upon the following documents:
FDIS Report on voting 72/710/FDIS 72/723/RVD
Full information on the voting for the approval of this part can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with ISO/IEC Directives, Part 2. This Part 2-4 is intended to be used in conjunction with IEC 60730-1. It was established on the basis of the third edition of that standard (1999) and its Amendment 1 (2003). Consideration may be given to future editions of, or amendments to, IEC 60730-1. This Part 2-4 supplements or modifies the corresponding clauses in IEC 60730-1 so as to convert that publication into the IEC standard: Particular requirements for thermal motor protectors for motor-compressors or hermetic and semi-hermetic type. Where this Part 2-4 states "addition", "modification" or "replacement", the relevant requirement, test specification or explanatory matter in Part 1 shall be adapted accordingly. Where no change is necessary, this Part 2-4 indicates that the relevant clause or subclause applies. In the development of a fully international standard, it has been necessary to take into consideration the differing requirements resulting from practical experience in various parts of the world and to recognize the variation in national electrical systems and wiring rules. The “in some countries” notes regarding differing national practice are contained in the following clauses and subclauses: - 6.101 - Table 7.2, item 101 - 12.2 - 17.2 - Table 17.2 - 17.2.1 - 17.2.2 - 18.1.3.101.2 - 20.1 - 20.2 - 20.3 - 20.3.1 - Table 20.3.101 - Annex D In this publication, the following print types are used: – Requirements proper: in roman type. – Test specifications: in italic type. – Explanatory matter: in smaller roman type.



60730-2-4 © IEC:2006 – 9 –
Subclauses, notes, items or figures which are additional to those in Part 1 are numbered starting from 101, additional annexes are lettered AA, BB, etc. A list of all parts of the IEC 60730 series, under the general title Automatic electrical controls for household and similar use, can be found on the IEC website. The committee has decided that the contents of this 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.



60730-2-4 © IEC:2006 – 11 –
AUTOMATIC ELECTRICAL CONTROLS FOR
HOUSEHOLD AND SIMILAR USE –
Part 2-4: Particular requirements for thermal motor protectors
for motor-compressors of hermetic and semi-hermetic type
1 Scope and normative references This clause of Part 1 is applicable except as follows: 1.1
Replacement: This part of IEC 60730 applies to the partial evaluation of thermal motor protectors as defined in IEC 60730-1 for sealed (hermetic and semi-hermetic type) motor-compressors. A thermal motor protector is an integrated control which is dependent on its correct mounting and fixing in or on a motor and which can only be fully tested in combination with the relevant motor. Requirements concerning the testing of the combination of motor and thermal motor protectors are given in IEC 60335-2-34. This standard applies to thermal motor protectors for motor compressors using NTC or PTC thermistors, additional requirements for which are contained in Annex J. 1.1.1
This standard applies to the inherent safety, to the operating values, operating times, and operating sequences, where such are associated with equipment safety, and to the testing of thermal motor protectors used in or on sealed (hermetic and semi-hermetic type) motor-compressors. This standard applies to thermal motor protectors for motor-compressors within the scope of IEC 60335-2-34. Throughout this standard the word "equipment" means "appliance and equipment". Thermal motor protectors for motor compressors not intended for normal household use, but which nevertheless may be used by the public, such as equipment intended to be used by laymen in shops, in light industry and on farms, are within the scope of this standard. This standard does not apply to thermal motor protectors designed exclusively for industrial applications. 1.1.2
This standard does not apply to other means of motor protection. 1.1.3
This standard does not apply to a manual device for opening the circuit.



60730-2-4 © IEC:2006 – 13 –
1.2
Replacement: This standard applies to thermal motor protectors for use with electric motors with a rated voltage equal to or less than 690 V and a rated output of 11 kW or less. Controls complying with the requirements of this standard are considered to comply with the requirements of IEC 60730-2-21). 1.3
Replacement: This standard does not take into account the response value of an automatic action of a control, if such a response value is dependent upon the method of mounting the control in the equipment. Where a response value is of significant purpose for the protection of the user, or surroundings, the value defined in the appropriate household equipment standard or as determined by the manufacturer applies. 1.5 Normative references Addition: IEC 60269-1, Low-voltage fuses – Part 1: General requirements IEC 60269-3, Low-voltage fuses – Part 3: Supplementary requirements for fuses for use by unskilled persons (fuses mainly for household and similar applications) IEC 60335-2-34:2002, Household and similar electrical appliances – Safety – Part 2-34: Particular requirements for motor-compressors 2 Definitions This clause of Part 1 is applicable except as follows: 2.6
Definitions of type of automatic action of a control according to test procedure Additional definition: 2.6.101
type 3 action automatic action for which reliability of the operating characteristics can only be evaluated in terms of measurements made on the protected motor-compressor ___________ 1) IEC 60730-2-2, Automatic electrical controls for household and similar use – Part 2-2: Particular requirements for thermal motor protectors.



60730-2-4 © IEC:2006 – 15 –
2.13
Miscellaneous definitions Additional definition: 2.13.101
sealed motor-compressor mechanical compressor (of a hermetic or semi-hermetic type) consisting of a compressor and a motor, both of which are enclosed in the same sealed housing with no external shaft seals, the motor operating in a refrigerant atmosphere. The enclosure may be permanently sealed by welding or brazing (hermetic compressor) or may be sealed by one or more gasketed joints (semi-hermetic compressor) 3 General requirements This clause of Part 1 is applicable. 4 General notes on tests This clause of Part 1 is applicable except as follows: 4.3.1.1 and 4.3.1.2
Not applicable. 4.3.2
Not applicable. 5 Rating This clause of Part 1 is not applicable. 6 Classification This clause of Part 1 is applicable except as follows: 6.4
According to features of automatic action 6.4.1
Not applicable 6.4.2
Replacement: – type 3 action. 6.4.3
Replacement: Type 3 actions are further classified according to one or more of the following constructional or operational features: These further classifications are only applicable if the relevant declarations have been made and any appropriate tests completed. An action providing more than one feature may be classified by a combination of the appropriate letters, for example, Type 3.C.L. A manual action is not classified according to this subclause. 6.4.3.1
Void



60730-2-4 © IEC:2006 – 17 –
6.4.3.2
– micro-disconnection on operation (Type 3.B); 6.4.3.3
– micro-interruption on operation (Type 3.C); 6.4.3.4
Void 6.4.3.5
Void 6.4.3.6
Void 6.4.3.7
Void 6.4.3.8
–
a trip-free mechanism in which the contacts cannot be prevented from opening and which may automatically be reset to the "closed" position after normal operation conditions have been restored if the reset means is held in the "reset" position (Type 3.H); 6.4.3.101
Thermal motor protectors are further classified according to the following constructional or operational features: – non-self-resetting (Type 3.B.H); – self-resetting (Type 3.C). Additional subclause: 6.101
According to limited short-circuit capability (applicable in Canada and the USA) For limited short-circuit test details, refer to 17.2. Not all designs of devices are capable of sustaining or interrupting the short-circuit current without introducing a fire hazard. There is definite evidence that a short circuit in an unprotected motor by itself may not necessarily introduce a fire hazard because the circuit is safely de-energized by the opening of the mains overcurrent device. But if there is a thermal protector in the path of the fault current, a fire may result from an arcing disturbance when this protector attempts to clear the fault. Such disturbances can and do occur before the mains overcurrent device has an opportunity to open. The tests of 17.2 are designed to assess the operation of a thermal motor protector under these conditions. 7 Information This clause of Part 1 is applicable except as follows: 7.2.6 Replacement: For thermal motor protectors for hermetic motor-compressors, information shall be provided as indicated in Table 7.2.



60730-2-4 © IEC:2006 – 19 –
Table 7.2 Replacement: Information Clause or subclause Method 1
Manufacturer's name or trade mark
7.2.6 C 2
Unique type reference 1) 2.11.1, 2.13.1, 7.2.6 C 6
Purpose of control 4.3.5, 6.3 X 7
Type of load controlled by each circuit 7) 6.2, 17 X 30
PTI of materials used for insulation 6.13 X 31
Method of mounting control 8 X 31a
Method of providing earthing of control 7.4.3, 9 D 43
Reset characteristics for cut-out action 3) 6.4, 11.4 X 49
Control pollution situation 6.5.3 X 51
Heat and fire resistance category 21 X 101 Limited short-circuit capability, if declared 101) 6.101, 17.2 X 102 Features of automatic actions 102) 6.4 D 103 Maximum pressure for controls located within the sealed compressor enclosure 103) 18.1.3.101.1 D NOTES 1) The unique type reference shall be such that, when it is quoted in full, the manufacturer of the control can supply a replacement which will be fully interchangeable with the original electrically, mechanically, dimensionally and functionally.
It may comprise a series type reference with other marking, such as voltage rating or an ambient temperature marking, which together provide a unique type reference. 3)
Manufacturers may declare a lower ambient temperature than that specified in 11.4.102. 7)
For controls with more than one circuit, the current applicable to each circuit and to each terminal. If these are different from each other, then it shall be made clear to which circuit or terminal the information applies. For circuits for resistive and inductive loads, the rated current, or the rated load in VA, at power factors as indicated in Table 17.2. 101) Applicable in Canada and the USA. 102) Thermal motor protectors are classified as Type 3.B.H and Type 3.C. 103) The test pressure depends on the intended refrigerant and the location of the protector inside the compressor (high side or low side).
Example values can be taken from Subclause 22.7 of IEC 60335-2-34.
8 Protection against electric shock This clause of Part 1 is applicable. 9 Provision for protective earthing This clause of Part 1 is applicable.



60730-2-4 © IEC:2006 – 21 –
10 Terminals and terminations This clause of Part 1 is applicable except as follows: 10.1 Not applicable. 10.2 Terminals and terminations for internal conductors Addition: For the purpose of this standard, internal wiring conductors are considered as integrated conductors. 11 Constructional requirements This clause of Part 1 is applicable except as follows: 11.3.4 Setting by the manufacturer Addition: Sealing compounds, lock nuts and the like are deemed adequate for this purpose. 11.4 Actions Additional subclauses: 11.4.101 A Type 3.B.H action shall operate to provide the electric strength requirements specified for micro-disconnection. Compliance is checked by the tests of Clause 13 and the relevant requirements of Clause 20. 11.4.102 A Type 3.B.H action shall be so designed that the contacts cannot be prevented from opening and may automatically reset to the closed position if the reset means is held in the reset position. The control shall not reset automatically at any test ambient temperature above –5 °C. Compliance is checked by inspection and, where necessary, by test, with no force applied to the actuating member. 11.4.103 A Type 3.C action shall operate to provide circuit interruption by micro-interruption. Compliance is checked by the relevant requirements of Clause 20. 12 Moisture and dust resistance This clause of Part 1 is applicable except as follows:



60730-2-4 © IEC:2006 – 23 –
12.2 Protection against humid conditions Addition: In Canada and the USA, the tests of Annex D determine proof against humid conditions. In Japan, this evaluation is done in the motor-compressor. 13 Electric strength and insulation resistance This
...