... No.ItemUnitParameters1Rated voltagePrimaryKV12SecondaryKV0.4,0.232Rated capacity KVA100,125,160,200,250,315,400,500,630,800,10003No-load tap changer ±2*2.5%4Vector group Yn115Rated insulation levelLightning impulse withstand voltage (full wave, peak)KV75Power frequency withstand voltage 1minKV356LV side power frequency withstand voltage, phase-phase and ...