245KV Current Transformer

220KV Current Transformer, Outdoor, Oil-immersed hair-pin type, used for metering and protection, single phase, applying to highland area, with protective class Technical dataRated voltage 220kVRated primary current (A)Rated short-timeThermal current(kA)Rated dynamiccurrent(kA)Highest voltage for equipment252kVRated frequency50 or 60 HzRated transformation ratio2×1000 2×2000 / 5 or 1ANumber of secondary windings1 81000-200031.5-50(3s)80-125Accuracy of measuring winding0.2, 0.2S, 0.5, 0.5S1200-240031.5-50(3s)80-125Accuracy of protection winding5P or 10P1250-250031.5-50(3s)80-125Rated secondary output20 60 VA1500-300031.5-50(3s)80-125Accuracy limit factors15, 20, 25, 30, 402000-400031.5-50(3s)80-125Instrument security factor≤5 or 10Partial discharge, under 1.2Um/√3kV≤5pCDielectric dissipation factor tgδ,under10kVUm/√3kV≤0.005,(variation) ≤0.001External insulation creepage distance(mm)W1/5040mmW2/6300mmW3/7812mmPower frequency withstand voltage on primary windings395 (460) kV rmsRated lightning impulse voltage950 (1050) kV peakPower frequency withstand voltage between primary sections3 kV rmsPower frequency withstand voltage on earth screen to earth5 kV rmsPower frequency withstand voltage on secondary windings and secondary windings to earth3 kV rmsSecondary winding inter-turn withstand voltage4.5 kV peakMechanical strength (three directions)2500N terminal with insulation3000NTerminal without insulation