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Detailed Description of Principal Types of Relays
Protection of Direct Current Systems 545
Protection of Alternating Current Systems 584
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3-phase actuated adjustment alternating current amperes apparatus application armature automatic autotransformer auxiliary relay Auxiliary Switch calibration cent circuit-breaker circuit-closing closing conductor connected contactor Cover Removed cuit current flowing Current Trans current transformer curves device diagram differential relay direct current directional element Directional Relay disconnect disk Electric energized fault Front View impedance Ind Ind Ind indicated induction Inst Inst Inst installed instantaneous insulation kv-a lever load machine magnetic magnetic circuit motor mounted normal ohms Oil Circuit Breaker overcurrent relays overload phase pilot wire Plu Plu plunger position potential transformers power factor primary protective relay rated ratio reactance reclosing relay operates RELAY TYPE reset resistance resistor rheostat rotation scheme secondary short-circuit shown in Fig shunt single-phase spring station stationary contacts substation switchboard temperature tion torque trip coil tripping circuit type of relay volt-amperes volts Westinghouse winding