A、A.brushes
B、B.slip rings
C、C.commutators
D、D.all of the above
更多“Brushless generators are designed to operate without the use of（）.”相关的问题
A、The generator needs not excitation B、The winding on the rotor is for inputting excitation current C、There are three phase windings on the rotor D、The generator has brushes
A、an exciter driven by the same shaft with the generator B、an exciter driven by external prime mover C、generator itself D、either A and B
A、To cut out generators when they are no longer required B、To cut in additional generators automatically as required C、To divide the KW load equally between generators operating in parallel D、To divide reactive current between generators operating in parallel
A、a variable-speed AC generator B、a fixed-speed AC generator C、an air blower D、a DC generator
A、 DSA key generated with 512 bits B、 RSA key generated with 768 bits C、 RSA key generated with 1024 bits D、 DSA key generated with 1024 bits E、 RSA key generated with 2048 bits
A、Trip the generator off the switchboard B、Turn off all electrical equipment C、Remove the load from the "off going" generator D、Increase the cycles of the generator staying on the line
A、Control panel of main generator B、Control panel of emergency generator C、Paralleling panel D、Load panel of main generator
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