Positive SSL
1 一部5kW、200V串激式電動機,其電樞電阻0.1Ω,激磁場電阻0.2Ω,起動電阻2Ω,則額定電壓起動時的啟動電流為何? 102 統測
A 87A
B 100A
C 113A
D 74A
IST=V/(RA+RS+RST) = 200/(0.1+0.2+2)≒87A