The DPV-20A busbar insulation monitoring device is a microcomputer voltage mutual inductance device with overvoltage protection, low voltage protection, grounding protection, and TV parallel as the basic configuration

The monitoring device is mainly suitable for single female segmented wiring.

DPV-21AandThe main difference of DPV-22A lies in the presence or absence of TV parallelism, which is detected when TV parallelism is presentVoltage and phase angle.