Switchboards for Power, Light and Railway Service, Direct and Alternating Current, High and Low Tension |
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ammeter amperes armature arranged arrester becomes blade break bus bars busses called capacity circuit breaker closed coils connected construction contacts controlled cross current passes Derry Collard desired devices diagram direction directly distributing double Electric entirely equalizing fact feed field Figure force four fuse ground hence illustrated inch increased independent indicate insulation lamps latter lead light located lower machines magnet main switch manner marble marked means metal meter necessary nected operated panel parallel passes phase placed plugs position practical prevent reduced regulator rent resistance result rheostats seen separate short shown in Fig shows shunt side simple single slab street mains strength surface switchboard synchronizing terminals throw tion transformers turned upper voltage voltmeter wires