单项选择题
A.It consumes no excitation power
B.It has current transformers
C.Components are needed for accurate compounding
D.Its excitation system is vulnerable to voltage variations
单项选择题 Generators should have an excitation/voltage regulation system which will enable them to share the steady state reactive load （） no machine exceeds its proportional share of reactive load by more than 10% of the rated reactive load of the largest generator.
单项选择题 If a steering motor becomes overloaded, the （）
单项选择题 When there is a fire in a large electric motor, normally the very FIRST step is to （）