A、With switches
B、With a governor on the engine
C、With fuses or circuit breakers
D、By using heavy wire
更多“Electric generators can be protected against overload（）.”相关的问题
A、a variable-speed AC generator B、a fixed-speed AC generator C、an air blower D、a DC generator
A、develop torque B、generate high voltages C、produce a magnetic field D、generate high electrical resistance
A、neutralize armature reaction B、conduct electric current to an outside circuit C、convert DC current to AC current D、provide excitation to a DC generator
A、low voltage trip B、reverse power trip C、damage to windings D、excessive exhaust temperatures
A、low voltage trip to trip B、reverse power trip to trip C、damage to windings D、excessive exhaust temperatures
A、A.non-synchronous electric motor B、B.synchronous electric motor C、C.fully enclosed electric motor D、D.watertight electric motor
A、generate its own electrical power B、transform electrical energy into mechanical energy C、increase or decrease circuit voltage as required D、convert AC current to DC current
A、After operation, start the electric motor. B、Before operation, stop the electric motor. C、Before operation, start the electric motor. D、After operation, stop the electric motor.
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