... energy measuring, relay protection in electricity. Current tansformerLB5-66,LVB-35,LB6-110 used for current ,electric energy measuring, and relay protection ... is our outdoor, single phase and oil immersed top-head type current transformer, wihich is used for metering and relay protection of 35kv ... ~50VAAccuracy Limite Factors15,20,25,30Instrument Security Factor<=5 or 10