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 (UL). Itis normative for the applicable
2、UL Product Certification Program(s); however, it is currently not part ofthe UL Standard(s) referenced below.Product Category (CCN): XAPX, SDFYStandard Number: UL 873Edition Date: November 16, 2007Edition Number: 12Section / Paragraph Reference: Section 12, Paragraph 12.3Subject: Reset Mechanism for
3、 Electro-mechanical Limiting Control test sequenceDECISION:The verification (or “trip-free”) test of the reset mechanism of an electro-mechanical limiting control shallbe performed on the same sample, following the Overload / Endurance test.RATIONALE FOR DECISION:After completion of the Overload / E
4、ndurance test, the reset mechanism (including the actuating meansand linkages) would have been exposed to mechanical and thermal stresses that could have an effect onthe reliability of the reset mechanism to perform its safety critical function in a consistent and reliablemanner.Copyright 2008 Under
5、writers Laboratories 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 Und
6、erwriters Laboratories 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 Requiremen
7、t Decisions 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electronic version of theCertification Requirement Decision is the current version and previously printed copies may be outdated.This document is published as a service to ULs certification customersUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSTANDARD NUMBER: UL 873 -2-No Text on This Page
