IEEE C37.20 : 69(R1981)
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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SWITCH GEAR ASSEMBLIES AND METAL-ENCLOSED BUS
23-07-2013
12-01-2013
Describes assemblies of switchgear devices such as interrupting devices, switches, control, instrumentation and metering, protective and regulating equipment, enclosed bus with associated interconnections, enclosures, and supporting structures.
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