[单选题]变压器的绝缘吸收比就是()s所测的绝缘电阻值与15s所测的绝缘电阻值之比A . 50B . 40C . 60D . 70
[单选题]测量吸收比时,应分别读取绝缘电阻表15s和()时的绝缘电阻值。A.5sB.20sC.60s
[单选题]测量吸收比时,应分别读取绝缘电阻表15s和()时的绝缘电阻值。A.5sB.20sC.60s
[单选题]测量吸收比时,应分别读取绝缘电阻表15s和( )时的绝缘电阻值。A.5sB.20sC.60s
[单选题]测量吸收比时,应分别读取绝缘电阻表15s和( )时的绝缘电阻值。A.5sB.20sC.60s
[单选题]测量吸收比时,应分别读取绝缘电阻表15s和( )时的绝缘电阻值。A.5sB.20sC.60s
[单选题]测量吸收比时,应分别读取绝缘电阻表15s和( )时的绝缘电阻值。A.5sB.20sC.60s
[单选题]测量吸收比时,应分别读取绝缘电阻表15s和( )时的绝缘电阻值。A.5sB.20sC.60s
[填空题] 通常又把60s和15s时的绝缘电阻值之比称为吸收比。绝缘正常的定子绕组的吸收比在()以上,若吸收比较小,说明传导电流的值较大,可以判断()等。
[单选题]吸收比是在同一次试验中,1min时的绝缘电阻值与()时的绝缘电阻值之比。A . 15sB . 10sC . 5sD . 20s