1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences ForUL 60730-2-4Standard for Automatic Electrical Controls for Household and Similar Use; Part 2: ParticularRequirements for Thermal Motor Protectors for Motor-Compressors of
2、Hermetic and Semi-Hermetic TypeUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences ForUL 60730-2-4Standard for Automatic Electrical Controls for Household and Similar Use; Part 2: ParticularRequirements for Thermal Motor Prote
3、ctors for Motor-Compressors of Hermetic and Semi-HermeticTypeEdition: 1Edition Date: January 17, 2003These revisions are being issued to:1) Add a national difference to the Heat, Fire and Tracking section, Section 21, to clarify that it isapplicable only to non-metallic and insulating materials whic
4、h are outside the motor-compressorhousing.2) Reflect the established effective date of UL 60730-2-4. AS OF OCTOBER 19, 2018, THETWELFTH EDITION OF UL 873 WILL BE WITHDRAWN AND WILL BE REPLACED BY THISSTANDARD.This document provides a single listing of the National Differences included in the UL adop
5、tion ofthe corresponding IEC standard.All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, ortransmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwisewithout prior permission of UL.UL provides this standards docume
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8、ndards document, regardless of the form of the claim.Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold ULharmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonableattorneys fees) resulting from any error or
9、 deviation introduced while purchaser is storing an electronicStandard on the purchasers computer system.Copyright 2014 Underwriters Laboratories Inc.MAY 28, 2014NATIONAL DIFFERENCES FOR UL UL 60730-2-42UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION
10、 FROM ULPrefaceThis document provides a single listing of the technical National Differences included in the UL adoptionof the corresponding IEC standard.In its IEC-based standards, UL uses the notations indicated below to identify national difference type, andthese types are additionally noted in t
11、his document. The standard may not use all types of thesedeviations.D1 - These are deviations which are based on basic safety principles and requirements, elimination ofwhich would compromise safety for U.S. consumers and users of products.D2 - These are deviations based on safety practices. These a
12、re deviations for IEC requirements that maybe acceptable, but adopting the IEC requirements would require considerable retesting or redesign on themanufacturers part.DC - These are deviations based on the component standards and will not be deleted until a particularcomponent standard is harmonized
13、with the IEC component standard.DE - These are deviations based on editorial comments or corrections.DR - These are deviations based on the national regulatory requirements.Each national difference contains a description of what the national difference entails. Typically one of thefollowing words is
14、 used to explain how the text of the national difference is to be applied to the base IECtext:Addition / Add - An addition entails adding a complete new numbered clause, subclause, table,figure, or annex. Addition is not meant to include adding select words to the base IEC text.Deletion / Delete - A
15、 deletion entails complete deletion of an entire numbered clause, subclause,table, figure, or annex without any replacement text.Modification / Modify - A modification is an altering of the existing base IEC text such as theaddition, replacement or deletion of certain words or the replacement of an
16、entire clause,subclause, table, figure, or annex of the base IEC text.MAY 28, 2014 NATIONAL DIFFERENCES FOR UL UL 60730-2-4 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences1.1DV DE Addition of the following Note to 1.1 of
17、the part 2:NOTE Requirements concerning the testing of the combination of hermetic motor-compressor andTHERMAL MOTOR PROTECTOR are given in UL 60335-2-34.1.1.1DV D2 Modification of 1.1.1 of the part 2:This standard applies to THERMAL MOTOR PROTECTORS for motor-compressors within the scopeof UL 60335
18、-2-34.1.2DV DR Modification of 1.2 of the part 2:This standard applies to THERMAL MOTOR PROTECTORS for use with hermetic motor-compressorswith a RATED VOLTAGE equal to or less than 600 V. No specific output power limits apply.1.5DV DE Addition to 1.5 of the part 2:The following UL Standard is quoted
19、 in this Standard:UL 60335-2-34,Household and Similar Electrical Appliances, Part 2: Particular Requirements for Motor-Compressors2.2.16DV D2 Addition to 2.2.16 of the UL part 1:The thermal protector may consist of one or more SENSING ELEMENTS integral with themotor-compressor and an external contro
20、l device.2.2.101DV D2 Addition to the UL part 2:MOTOR-COMPRESSOR ENCLOSURE:AMOTOR-COMPRESSOR ENCLOSURE denotes a sealed housing thatcontains the compressor, motor, and in some cases, a THERMAL MOTOR PROTECTOR; all ofwhich are subjected to refrigeration pressures.11.1DV D2 Modification to add 11.1DV.
21、1 to 11.1 of the UL part 1:11.1DV.1 Electrical insulating materials and systems used on the inside of MOTOR-COMPRESSOR ENCLOSURES shall be compatible with:a) The refrigerants and oils intended to be used with the motor-compressor;b) Each other; andc) Other materials used within the enclosure.NOTE Re
22、quirements and compatibility tests for this determination are specified in UL 60335-2-34.MAY 28, 2014NATIONAL DIFFERENCES FOR UL UL 60730-2-44UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL13.2.1DV.1.1 D2 Modification to add the following to
23、13.2.1DV.1.1 of the UL part 1:The test potential shall be 1 000 V for motor-compressors rated not more than 250 V andhaving locked-rotor values not exceeding 6,76 kVA for single-phase motor-compressorsand 4,76 kVA for three-phase motor-compressors.14DV DE Modification of the part 2:Requirements conc
24、erning the testing of THERMAL MOTOR PROTECTORS are given in UL 60335-2-34.17DV DE Modification of the note in the part 2:NOTE Endurance requirements for THERMAL MOTOR PROTECTORS applied to hermetic motor-compressors arerepresented by the locked-rotor test requirements of UL 60335-2-34.18.1.3.101.1DV
25、 DE Modification of 18.1.3.101.1 of the part 2:Requirements concerning the testing of THERMAL MOTOR PROTECTORS are given in UL 60335-2-34.Table 20.3.101DV D2 Replacement of Table 20.3.101 of the Part 2 with the followingTable 20.3.101DV:Table 20.3.101DV CREEPAGE DISTANCES and CLEARANCES for a THERMA
26、L MOTOR PROTECTOR mounted on theoutside of the sealed housing of a motor-compressorMotor-compressor ratingsDimensions in mm required between LIVE PARTSof different polarity and across BASIC INSULATIONV-A V CLEARANCE CREEPAGE to enclosure0 2 000 0 300 3,2 6,4 6,4301 660 9,5 12,7 12,7More than 2 000 0
27、 150 3,2 6,4 12,7150 300 6,4 9,5 12,7301 660 9,5 12,7 12,7NOTES1 The values in Table 20.3.101 do not apply to conventional motors.2 The volt-ampere rating is judged on the basis of the total rated load volt-amperes of the load(s) carried by thethermal protector. For the purpose of this standard, the
28、 CREEPAGE and CLEARANCE distance is based on the maximumassigned rated-load current(s) and the marked voltage ratings of the motor-compressor, except that such distancesmay need to be increased depending upon the actual measured load(s) controlled by the thermal protector.3 To enclosure CLEARANCE an
29、d CREEPAGE DISTANCES do not apply between a thermal protector and individual electricalenclosures of a motor-compressor where such enclosures are contained within an outer enclosure or cabinet, in theapplication.4 For circuits not exceeding 300 V, the CREEPAGE DISTANCES at glass-insulated terminals
30、may be 3,2 mm where 6,4 mm isspecified and may be 6,4 mm where 9,5 mm is specified in Table 20.3.101. This does not apply if corrosion protectionprovided on the terminal assembly extends over the glass insulation.5 The CLEARANCE and CREEPAGE DISTANCES between wiring terminals of OPPOSITE POLARITY, o
31、r between a wiring terminal and agrounded metal, shall not be less than 6,4 mm except that if short-circuiting or grounding of such a terminal will notresult from projecting strands of wire, the distances need not be greater than that given in Table 20.3.101. Wiringterminals are those connected in t
32、he field and are not factory wired.6 An insulating liner or barrier of vulcanized fiber or similar material employed where a spacing would otherwise beless than the minimum acceptable value shall not be less than 0,8 mm thick and shall be so located or of suchmaterial that it will not be adversely a
33、ffected by arcing.MAY 28, 2014 NATIONAL DIFFERENCES FOR UL UL 60730-2-4 5Table 20.3.101DV CREEPAGE DISTANCES and CLEARANCES for a THERMAL MOTOR PROTECTOR mounted on theoutside of the sealed housing of a motor-compressor Continued on Next PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODU
34、CTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 20.3.101DV CREEPAGE DISTANCES and CLEARANCES for a THERMAL MOTOR PROTECTOR mounted on theoutside of the sealed housing of a motor-compressor ContinuedMotor-compressor ratingsDimensions in mm required between LIVE PARTSof different polarity and acr
35、oss BASIC INSULATIONV-A V CLEARANCE CREEPAGE to enclosure7 A barrier or liner of vulcanized fiber not less than 0,4 mm thick may be used in conjunction with a CLEARANCE of notless than 50% of the minimum acceptable CLEARANCE. Insulation material having a thickness less than that specified maybe used
36、 if, upon investigation, it is found to be acceptable for the particular application.101 Within a hermetic motor construction, spacings to film coated wire which is rigidly held in place may be asfollows: 2,4 mm between dead metal parts and the film coated wire, unless a smaller spacing is specified
37、above; 1,6 mm CLEARANCE and 2,4 mm CREEPAGE DISTANCE between LIVE PARTS and the film coated wire.21DV D2 Replacement of Section 21 of the part 2 with the following:This clause of Part 1 is applicable only to non-metallic and insulating materials which areoutside the motor-compressor housing.Annex FDV D2 Replacement of Annex F of the UL part 1:This annex of Part 1 is not applicable.Annex GDV D2 Replacement of Annex G of the UL part 1:This annex of Part 1 is not applicable.MAY 28, 2014NATIONAL DIFFERENCES FOR UL UL 60730-2-46
