1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUNDERWRITERS LABORATORIES INC. CERTIFICATION REQUIREMENT DECISIONThis Certification Requirement Decision is prepared by UL LLC. It is normative for the applicable ULProduct Certification Program(
2、s); however, it is currently not part of the UL Standard(s) referencedbelow.Product Category (CCN): ZCTTStandard Number: UL 1206Standard Title: Standard for Electric Commercial Clothes-Washing EquipmentEdition Date: April 22, 2003Edition Number: 4Section / Paragraph Reference: 20A.2.3, 20A.3.4, Tabl
3、es 20A.1 and 20A.2Subject: Clarification of Endurance Cycles for Control DevicesDECISION:20A.2.3 The minimum test parameters for the evaluation of an operating control to the Standard forAutomatic Electrical Controls - Part 1: General Requirements, UL 60730-1 and any applicable Part 2 arespecified i
4、n Table 20A.1.Table 20A.1Operating control correlation table(See 20A.2)Information Operating control requirementFMEA Conduct a failure-mode and effect analysis (FMEA) to identifycomponents the failure of which may result in a risk of fire orelectric shock or injury to persons.Operating ambient Deter
5、mined in accordance with Section 36, Temperature Test,of the applianceEndurance testing for electromechanical devices 6,000 cycles for temperature-regulating devices and othertypes of operating controlsOvervoltage Category Overvoltage Category IIPollution degree See 23A.420A.3.4 Controls that manage
6、 a SCF and that does not rely on software shall comply with the standardsspecified in 20A.3.2 except for Controls Using Software, H.11.12, in the Standard for Automatic ElectricalControls - Part 1: General Requirements, UL 60730-1. If software is relied upon to perform the protectivecontrol function
7、, it shall be considered Software Class B as indicated in Table 20A.2.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 20A.2Protective control correlation table(See 20A.3)Information Protective control requirementFMEA Conduct a failure-mo
8、de and effect analysis (FMEA) identifyingcomponent failures which may result in a risk of fire, electricshock or injury and confirming the protective functioncontinues to operate as intended.Operating ambient Determined in accordance with Section 36, Temperature Test,of the applianceEndurance testin
9、g for electromechanical devices a) 6, 000 cycles for controls as indicated in 20A.5, 20A.6,20A.7, and for manual, non-self-resetting temperature-limitingdevices, and other manual, non-self-resetting protectivecontrolsb) 100,000 cycles, for automatic, self-resetting temperature-limiting controls, com
10、bination temperature-limiting andregulating controls, and other automatic, self-resettingprotective controlsOvervoltage category Overvoltage Category IIPollution degree See 23A.4Radio-frequency electromagnetic field immunity to conducteddisturbancesTest Level 3Radio-frequency electromagnetic field i
11、mmunity to radiatedelectromagnetic fieldsField strength of 3 V/mFast transient bursts Test Level 3 applied for 1 minute in each polaritySurge immunity Installation Class 3Electrostatic discharge Severity Level 3Thermal cycling for electronic devices 14 days, Assumed temperature range: 10.0 +2 C to t
12、heoperating ambientSoftware class Software Class B (See 20A.3.4)RATIONALE FOR DECISION:This Certification Requirement Decision is intended to clarify the endurance cycles for operating andprotective control devices, and documents present practice in the application of these requirements.Copyright 20
13、17 UL LLCUL LLC, 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 UL LLC. in prac
14、tically applying therequirements of the standard. They do not represent formal interpretations of the standard underAmerican National Standards Institute (ANSI) processes. UL LLC shall not be responsible to anyone forthe use of or reliance upon Certification Requirement Decisions by anyone. UL LLC s
15、hall not incur anyobligation or liability for damages, including consequential damages, arising out of or in connection withthe use or reliance upon Certification Requirement Decisions. The electronic version of the CertificationRequirement Decision is the current version and previously printed copies may be outdated.This document is published as a service to ULs certification customersSTANDARD NUMBER: UL 1206 -2-
