IB-80000A Non Segregated Phase Bus Duct - Powell Industries, Inc.

2 Powered by Safety ®Non Segregated Phase Bus Duct IB-80000A! CAUTIONBEFORE ANY ADJUSTMENT, SERVICING, PARTS REPLACEMENT, OR ANY OTHER ACT ISPERFORMED REQUIRING PHYSICAL CONTACT WITH THE ELECTRICAL WORKING COMPONENTSOR WIRING OF THIS EQUIPMENT, THE POWER SUPPLY MUST BE DISCONNECTED.I. INTRODUCTION2) Do not work on an energized bus duct.3) Do not climb on, walk on or sit on the busBefore installing the bus duct, study this manualduct. It is not designed to support the weightand the drawings furnished with the bus duct.of a person.Because bus duct is highly variable equipment,custom designed for the particular application, theseinstructions nor the drawings are complete withoutreference to the other. Follow the recommended4) Do not use the bus duct for support of otherequipment. It is not designed to support thisextra weight.procedure for putting into service.5) For the safety of personnel performingThis manual contains:1) Safety Rules.2) A general description of the bus duct.3) Instructions for putting into service.maintenance operations on the bus duct oron connected equipment, all componentsshould be disconnected by means of a visiblebreak and securely grounded.4) Instructions for maintenance.6) See additional safety precautions inthe sections headed “HANDLING” andINSTALLATION”.These instructions do not purport to cover alldetails or variations of bus duct, nor to provide forevery possible contingency or hazard to be metin connection with further information be desiredIII. DESCRIPTIONor should particular problems arise which are not The bus duct covered by these instructions is noncovered sufficiently for the user’s purposes, the segregated phase bus designed, built and tested inmatter should be referred to Powell.accordance with ANSI/IEEE StandardC37.23-1987, IEEE Guide for Metal-Enclosed Bus andII. SAFETYCalculating Losses in Isolated Phase Bus. This standarddefines metal-enclosed bus as “An assembly ofconductors with associated connections, joints,The bus duct described in this manual, when in and insulating supports within a grounded metalservice, will be energized by voltages which will cause enclosure. The conductors may be either rigid orsevere injury or death if contacted. To insure the flexible.” It further defines nonsegregated phasesafety of personnel associated with the installation, bus as “One in which all phase conductors are in aoperation and maintenance of bus duct, the following common metal enclosure without barriers betweenrules should be observed:the phases.”1) Only qualified personnel trained in theinstallation, operation and maintenanceof electrical power equipment should beallowed to work on this bus duct.