振荡变压器通常是在环形铁氧体磁芯上绕线制成，实际上是一个电流互感器。
Oscillation transformer are usually made on the ring ferrite core coil winding, is actually a current transformer.
本型电流互感器的铁心为圆环形，二次绕组匀绕制在铁心圆周上，用环氧树脂混合料浇注成形。
The series of current transformers are resin insulated, fully enclosed and busbar type. The iron core is circular and the secondary winding goes around the core before casting by epoxy.
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