... , relay protection in electricity. Current tansformerLB5-66,LVB-35,LB6-110 used for current ,electric energy measuring, and ... outdoor, single phase and oil immersed top-head type current transformer, wihich is used for metering and relay protection ... 66kvSystem Highest Voltage: 72.5kvSystem Rated Frequency: 50Hz or 60 HzSystem Neutral Earthing Method: non-effectively earthed Rated Voltage66kvHighest ...