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): JZGZ/2Standard Number: UL 1004-4Standard Title: Standard for Electric GeneratorsEdition Date: October 25, 2011Edition Number: 2Section / Paragraph Reference: 6A (new), Table 6A.1, 7.2, 7.3Subject: Max
3、imum temperatures requirements for standby generatorsDECISION:(New Section)6A Temperature Test for Standby Generators6A.1 STANDBY GENERATOR Electrical generator intended to provide temporary power duringemergency conditions.6A.2 When tested in accordance with the Temperature Test of UL 1004-1, the w
4、indings of a standbygenerator shall not exceed the limits specified in Table 6A.1, when adjusted to a 40C ambient.Table 6A.1Maximum winding temperature for standby generators(thermocouple or resistance method)Materials and components C (F)Class A (105) 125 (257)Class B (130) 145 (293)Class F (155) 1
5、70 (338)Class H (180) 190 (374)6A.3 For standby generators, during the temperature test, when the temperature on a field-installed leador on any part within the wiring compartment that can be contacted by a lead is more than 60C (140F)when adjusted to the rated ambient, the standby generator shall b
6、e marked at or near the point where fieldconnections shall be made, and so located that the marking is readily visible during installation inaccordance with 7.3. The temperature value to be used in the marking shall be in accordance with Table6A.2.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER R
7、EPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 6A Terminal box markingMaximum temperatureaattained in terminal box or compartmentduring temperature testTemperature markingC (F) C (F)61 75 (142 167) 75 (167)76 90 (169 194) 90 (194)aCorrected to an ambient temperature of 40C (77F).(New)7.2
8、 A standby generator shall be marked “Standby Service”.(New)7.3 When the temperature within a terminal box exceeds the 60C at a point where field installed leadscan contact, a standby generator shall be additionally marked with the following: CAUTION: Use supplywires suitable for _C or equivalent wo
9、rding. The temperature to be marked shall be 75C, or 90Cfor temperature ranges of 61 75C, 76 90 C, respectively. The marking shall appear on thenameplate, in the terminal box, or near the point where the supply connections are made.Exception: Generators intended for use only as components or specifi
10、c equipment need not be so markedif this information is provided separately.RATIONALE FOR DECISION:Standby generators are intended to provide temporary power under emergency conditions (e.g. untilpower is restored after a storm).The maximum temperature limits in UL 1004-1 are based on a machine oper
11、ating continuously up to thegiven temperature for the entire life of the machine.Since standby generators are intended be operated only under temporary conditions, higher temperaturescan be allowed without compromising the insulation system while still providing an acceptable service lifeof the gene
12、rator.The maximum temperatures allowed for standby generators are 20C below the maximum temperaturelimits for running overload conditions and, depending on the insulation class, between 25-30C below theaverage locked-rotor temperature limits specified in UL 1004-3 for the corresponding insulation cl
13、ass.This Certification Requirement Decision is intended to document the allowable maximum temperatures forstandby generators and aligns with the allowable maximum temperatures for standby generators in otheraccepted standards (i.e. CSA C22.2 No.100).Copyright 2017 UL LLCUL LLC, in performing its fun
14、ctions 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 practically applying therequirements of th
15、e 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 shall not incur anySTANDARD NUMBER: UL
16、1004-4 -2-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULobligation or liability for damages, including consequential damages, arising out of or in connection withthe use or reliance upon Certification Requirement Decisions. The electronic ve
17、rsion 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 1004-4 -3-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSTANDARD NUMBER: UL 1004-4 -4-No Text on This Page
