1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMarch 6, 20081SUBJECT 2570OUTLINE OF INVESTIGATIONFORPART 6: LOW-VOLTAGE SURGE WITHSTAND TELECOMMUNICATIONSELECTRONIC CURRENT LIMITERS (ECL)ISSUE NO. 1MARCH 6, 2008Summary of TopicsThis first iss
2、ue of the Outline of Investigation for Low-Voltage SurgeWithstand Telecommunications Electronic Current Limiters (ECL), Subject2570, applies to Electronic Current Limiters for up to 600 Vac, 60 A limitedduration current interrupting capability.The UL Foreword is no longer located within the UL Stand
3、ard. For informationconcerning the use and application of the requirements contained in thisStandard, the current version of the UL Foreword is located onULStandardsInfoNet at: http:/ 2008 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WI
4、THOUT PERMISSION FROM ULMARCH 6, 2008SUBJECT 25702No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTS1 General 41.1 Scope .42.0 Definitions 43.0 Service Environment Conditions .44.0 Classification .4MARCH 6, 2008 SUBJE
5、CT 2570 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL1 GeneralNote: This Part is intended to be read together with Low-Voltage Surge Withstand TelecommunicationsOvercurrent Protector Components Part 1: General Requirements, hereafter refer
6、red to as Part 1. Thenumbering of the Clauses in this Part corresponds to like numbered Clauses in Part 1. The requirementsof Part 1 apply unless modified by this Part.1.1 ScopeThis Part applies to Electronic Current Limiters for up to 600 Vac, 60 A limited duration current interruptingcapability.2.
7、0 DefinitionsPeak Impulse Voltage (Vimp) The maximum ECL rated voltage for lightning impulse faults.3.0 Service Environment ConditionsThe manufacturer may specify that the DUT be coordinated with a specified overvoltage protector shuntedacross it, as described in Part 1, subclause 7.6.4.0 Classifica
8、tion4.1 Category 1 Product meets intended template.4.2 Category 2 Product meets intended template with a complementary overvoltage protection devicewhich meets the following conditions:1) OVP device DC breakover voltage is greater than the maximum AC stress voltage for theintended template.2) OVP device impulse breakover voltage is less than the ECL Vimp rating for all Impulsestress voltages of the intended template.MARCH 6, 2008SUBJECT 25704
