STANDARD FOR SAFETY Motor Control Centers

基础信息

标准简介

UL 845 STANDARD FOR SAFETY Motor Control Centers1 Scope1.1Products covered1.1.1 This standard applies to motor control centers to be used in accordance with the U.S. NationalElectrical Code,ANSI/NFPA 70,CSA C22.1, Canadian Electrical Code, Part 1, and the Mexican Electricallnstallations (Utility),NOM-001-SEDE.1.1.2 These requirements cover motor control centers for use on circuits having available short-circuitcurrents not more than 200 000 A rms symmetrical or 200 000 A dc.1.1.3 This standard applies to single- and three-phase 50 and 60 Hz and dc motor control centers ratednot more than 1000 V ac or dc.1.1.4 Requirements for fire pump controllers are as provided in Annex C, item 11.1.2Products not coveredThese requirements do not cover switchboards or panelboards intended for the control of electric light andpower circuits, nor do they cover an individual unit for this purpose.Such units, however,that consist ofmanually or automatically operated switches, branch-circuit or service-circuit circuit-breakers, overcurrent-protective devices, or the like may be used within a motor control center.1.3Equipment1.3.1 A motor control center can contain, but is not limited to, any combinatio

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