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Threephase Asynchronous Motors
Control and Protective Gear for Threephase
3 other sections not shown
air gap alternating current ammeter apparatus armature ball and roller bimetal binder breather British Thomson-Houston brush gear brush sets brush-holders Cage Rotor capacitor carbon cause centrifugal switch circuit circuit-breakers clean coil turns Commutator Motor commutator surface conductors connected connexions contactor copper d.c. machines damage dashpot deterioration direct current earth electrical end rings energizing failure fault fitted fuses h.p. motors heating insulating materials insulating segments insulation resistance interlocked interpole Isolating switch leakage load lubricating magnetic maintenance mechanical metal mica moisture no-volt coil no-volt release normal open-circuited operation overheating overload trip phase winding pilot motor poles power factor protective devices roller bearings rotor core rotor winding shaft short short-circuiting shunt Silica Gel single-phase slip rings slot solenoid sparking spring pressure squirrel-cage rotor starter starting torque stator winding supply lines Switchgear tank temperature three-phase induction motor torque transformer usually Variable-speed varnish voltage wear wire wound rotor