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Relay Coils Factors affecting the Design of Relay Coils
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A.C. supply actuated adjustment air gap alternative ampere turns anode current applied armature arrangement battery bimetal capacitor cathode charging circuit of Fig closed contact cold cathode condition conductor connected contact arm contact closure controlled circuit core curve cycle delay device direct current disc discharge driving magnet eddy currents electrical electronic excites relay flux frequency galvanometer gasfilled grid half-cycle heater high-speed relay impulse increased indicated inductance insulation iron circuit lamp latch magnetic amplifier magnetic circuit magnetic field magnetic reluctance mechanical mercury switch metal motor neon lamp number of turns period phase photocell pilot pole position possible pulse rectifier reduced relay A/I relay circuit relay coil relay operates release reset resistance reverse rotation secured selector short circuit shown in Fig signal spring supply voltage temperature thermionic valve thermistor torque triode tube type of relay uniselector switch valve vibration voltage winding wipers wire zero