In comparison to a main switchboard for a DC electrical distribution system, a main switchboard for an AC electrical distribution system requires the use of which of the following devices, whereas a DC main switchboard does not?
A
Reverse power or current relays
B
Generator and load center circuit breakers
C
Frequency meter, power factor or reactive power meters, and synchronizing lamps or synchroscope
D
Voltage regulator and prime mover governor speed controls
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Question 1 / 205eccefa4bacbc34ba4d48472
Question 1 of 205eccefa4bacbc34ba4d48472
In comparison to a main switchboard for a DC electrical distribution system, a main switchboard for an AC electrical distribution system requires the use of which of the following devices, whereas a DC main switchboard does not?
In comparison to a main switchboard for a DC electrical distribution system, a main switchboard for an AC electrical distribution system requires the use of which of the following devices, whereas a DC main switchboard does not?