... :20kV 3.Model:LRGB4-20B 4.indoor,casting type,busbar type,with protective class LRGB4-20B CURRENT TRANSFORMER 1.current ... transformer2.rated voltage class:20kV3.Model:LRGB4-20B4.indoor,casting type, ... products qualification.T1----- Self voltage regulator 30KVAT2----- Large current transformer 30KVACT---- To be tested TPY, 10P or 0.2SBusbar ...