Type LZZBJ 12-12 current transformer is used for metering and protective relaying purposes for installation in indoor up to 10KV rated voltge frequency 50Hz，The current transformer is used for metering and protective relaying acdon in indoor and especially is suited for using in the narrow case(fixed)ring-net switch gear．
  The technical data 
  2．1 Rated insulation level：i12／42／75KV；
  2．2 Frequecy(Hz)：50Hz
  2．3 Rated primary current：50-1200(1250)A；
  2．4 Rated secondary current：5A；
  2．5 Accuracy classes：0．5／5p；
  2．6 Meter rage class safeguard sytem：Fs<10；
  2．7 5Pff rated aaccuracy lint factor：5P10；
  2．8 The measurement of partial discharge level is in accordance with GB5583-85 and IEC44-4，Apparent partial discharage level not more than 20PC；
  2．9 Power factor：0．8(hysteresis)；
  2．10  Rated primary currnet accurcy classes，rated output and short-time thermal Currnet see talbe