The following devices that do not belong to primary devices are ()
A、Lightning arrester
B、 Current meter
C、Voltmeter
D、 button
Electrical Equipment and Operation（电气设备及运行）

章节列表

Chapter 1 Cognition of Power Plants and Stations10Chapter 2 Switching Equipment and Operation57Chapter 3 Transformer and Operation38Chapter 4 Current-limiting Electrical Appliances and Operation9Chapter 5 Reactive Power Compensation Equipment and Its Operation10chapter 6 Busbar, Cable, Insulator and Operation10Chapter 7 Basic Operation of Electrical Primary System22Chapter 8 Power Distribution Device and Operation33