JDZ-3-3,6,10(Q)type single-phase double coil voltage transformer of epoxy casting ... insulation for indoor device use, JDZ-3-3,6,10(Q)type single-phase double coil voltage transformer of epoxy casting ... figure 1 wiring diagram ) JDZ(J)3-3,6,10(Q)type single-phase double coil voltage transformer of epoxy casting ...