UL 60745-1 CRD-2010 UL Standard for Safety Hand-Held Motor-Operated Electric Tools C Section Paragraph Reference Clause 23 1 10 and Annex I Supersedes prior Certification Requiremy.pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUNDERWRITERS LABORATORIES CERTIFICATION REQUIREMENT DECISIONThis Certification Requirement Decision is prepared and published by Underwriters Laboratories Inc.(UL). It is normative for the applic

2、able UL Product Certification Program(s); however, it is currently notpart of the UL Standard(s) referenced below.Product Category (CCN): XJYWStandard Number: UL 60745-1Edition Date: July 31, 2007Edition Number: 3Section / Paragraph Reference: Clause 23.1.10 and Annex ISupersedes prior Certification

3、 Requirement Decision issued 2005-09-15DECISION:Addition to clause 23.1.1023.1.10 Mains switches shall have adequate breaking capacity, and shall be switches for 50 000 cyclesof operation.Compliance is checked by inspection and by the following test.Switches that comply with the following acceptance

4、 criteria are considered in compliance.a. A switch complying with UL/CSA 61058-1,b. A switch that complies with UL 1054 and CSA C22.2 No. 55 and complies with Annex I ofUL/CSA 60745 3rd edition. (Requires Thermal Heating after 50,000 cycles to verify compliancewith the temperature rise limit of 55C

5、), orc. A switch that complies with UL 1054 and CSA C22.2 No. 55, and also complies with IEC61058-1.Note 1:A switch that complies with IEC 61058-1 shall be investigated at rated current andvoltage or greater. A switch previously investigated at 240V, 5A (IEC compliant) is consideredsuitable for a ra

6、ting at 120V, 5A. Loading for the 50,000 cycle endurance test shall be inaccordance with the classification for motor loads per 7.1.2.2 of IEC 61058 3rd Ed. and shall betested at accelerated speed at 25C 10C.Addition to Annex ISwitches which are tested with the tool shall comply with this standard a

7、nd with the following clauses ofIEC 61058-1, as modified.The tests of IEC 61058-1 are carried out under the conditions occurring in the tool.Unless otherwise specified, the tests are carried out on the switch incorporated in the tool.Before being tested in the tool, switches are operated 20 times wi

8、thout load.To determine compliance with clause 23.1.10 alternative compliance criteria, the following tests arecarried out on three samples of the On/Off switch incorporated in the tool.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULThe switc

9、h shall be loaded at rated voltage or at the upper limit of the rated voltage range ofthe tool under the conditions occurring in the tool, the making current being the inrush current ofthe tool and the breaking current being the rated current of the tool. Any electronic circuitlimiting the inrush cu

10、rrent shall be removed, unless it is integral to the switch.Rated current may be achieved by loading the tool to rated current or a simulated load circuitparallel to the motor of the tool running at no-load. In this case, mechanical devices such asgears or impact mechanisms may be disabled.Alternati

11、vely, the switch may be tested external to the tool using the actual load of the tool asnoted above or the loading per the classification of 7.1.2.2 (motor rating) of UL 61058-1.The method of operation is that specified for accelerated speed under the Manual andMechanical Conditions in 17.2.3. (80 m

12、m/s for linear actuations and 25 mm/s for linearactuations for variable speed electronic switches) For electronic switches, the electricalconditions are those specified in Table 15. The thermal conditions are those specified in 17.2.2.The temperature rise at the terminals during the Thermal Heating

13、Test shall not exceed 55Cafter 50,000 cycles. The tests are carried out after the noted cycles of operation have beenperformed under the conditions of the tool.The temperature rating of the wire insulation connected to the switch shall be rated minimum60C or not less than 30C plus the maximum temper

14、ature rise measured on the terminalinsulation, whichever is greater.Variable Speed switches with integral electronics shall be tested in the same manner as anOn/Off switch. At the end of the 50,000 cycles, the switch shall comply with FunctionalCompliance (TE1), Thermal Heating (after 50,000 cycles

15、as above), and Insulating Compliance(TE3). Functional Compliance is considered to be functioning of the On/Off control after the50,000 cycles.RATIONALE FOR DECISION:Reflects current practice.The revised Certification Decision has been issued to reflect the new requirement in UL 61058-1, clause17.2.5

16、.2.1.1 DV, which allows thermal compliance at 55K after 50,000 cycles for switches intended for usein end products that are certified to harmonized IEC standards. Since UL 60745-1 is a harmonized IECstandard, thermal compliance after 6,000 cycles is no longer required.Copyright 2007 Underwriters Lab

17、oratories Inc.UL, in performing its functions in accordance with its objectives, does not guarantee or warrant thecorrectness of Certification Requirement Decisions it may issue or that they will be recognized or adoptedby anyone. Certification Requirement Decisions are the opinion of Underwriters L

18、aboratories Inc. inpractically applying the requirements of the standard. They do not represent formal interpretations of thestandard under American National Standards Institute (ANSI) processes. UL shall not be responsible toanyone for the use of or reliance upon Certification Requirement Decisions

19、 by anyone. UL shall not incurany obligation or liability for damages, including consequential damages, arising out of or in connectionwith the use or reliance upon Certification Requirement Decisions. The electronic version of theCertification Requirement Decision is the current version and previou

20、sly printed copies may be outdated.STANDARD NUMBER: UL 60745-1 -2-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULThis document is published as a service to ULs certification customersSTANDARD NUMBER: UL 60745-1 -3-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSTANDARD NUMBER: UL 60745-1 -4-No Text on This Page