... -66,LVB-35,LB6-110 used for current ,electric energy measuring, relay protection in electricity. Current tansformerLB5-66,LVB-35,LB6-110 used ... for current ,electric energy measuring, and relay protection in electricity system. it is oil paper ... phase and oil immersed top-head type current transformer, wihich is used for metering and relay protection of 35kv, 50 or 60HZ system ...