... be used at CT/PT large manufacturers or sub-station with high voltage interference.Product Features:-Apply with ... 5%) error curve , ²ALF (accuracy limiting factor), FS (instrument security factor), ²Vb (max. terminal voltage), Kssc (secondary short-circuit ... 10% (5%) error curve, the accuracy limit factor, instrument security factor, second time constant, remanence factor, accuracy class, saturated ...