ST Control Transformer_264_148

ST Control Transformers

ST control transformers are constructed fully according to IEC/EN 61558 guidelines, with advantages including the possibility to select between earthed or unearthed operation, preventing low voltage drop in the case of switching inductive loads, possibility to correct main voltage by means of tapping, dampening of wire line interferences of the mains circuit, limitation of short-circuit current in the control circuit, and simpler voltage and insulation testing.