单项选择题
Synchrocope and synchro light are located on （） of main switchboard.
A.load panel B.emergency generator control panel C.battery changing and discharging panel D.paralleling panel
单项选择题 To （） , the power is supplied by main switchboard directly not though sub-board.
单项选择题 （）is not installed on the main switchboard.
单项选择题 （）is used to control, modulate, monitor and protect generator set.
