Category:power
Question:
insulation resistance measurement of CT PT when the secondary winding should be short-circuit or open circuit?
where the resistance is right where the insulation? ?
Thank you
Answer:
Hello!
CT Insulation resistance:
CT with Capacitive and electromagnetic structure difference.
Capacitive current transformer insulation resistance: L1L2 / end of screen, respectively; the end of screen / L1L2, respectively; secondary need to be shorted after the grounding.
electromagnetic current transformer insulation resistance: L1L2 / second, respectively; are shorted after the second ground.
Chinese:测量CT PT绝缘电阻的时候，二次绕组应该短路还是开路？
类别: 电力
问题:
测量CT PT绝缘电阻的时候，二次绕组应该短路还是开路？
该电阻是哪里对哪里的绝缘？？
谢谢
回答:
你好！
CT绝缘电阻：
CT有电容型和电磁型结构的区别。
电容型电流互感器的绝缘电阻：L1L2/末屏、地；末屏/L1L2、地；二次均需短接后接地。
电磁型电流互感器的绝缘电阻：L1L2/二次、地；二次均短接后接地。
