Oil H.V. HRC Current-limiting fuses type O for transformer protection is mainlyused in AC 50Hz,rated voltage 3.6-24kV,rated current 200A(3.6KV), 160A(7.2KV), 125A(12KV) and below circuit for protecting transformers and powerequipments from overload and short-circuit.It conforms to IEC282-1.BS, DIN and GB1566.2