The DPZ-21 backup automatic intelligent monitoring device is independently developed and produced by our company, and can be installed in segmented contact cabinets of 10kV and below.

Basic protection: Depending on the protected equipment and protection requirements, the protection device can be configured with different functions. Specific function selection table.
DI/DO: 12 DI AC/DC dual-use, 6 DO.

Communication: Can be equipped with dual RS485 ports, or can be configured with one CAN and one RS485 interface.

Telemetry: measurement of three-phase voltage, three-phase current, zero sequence current, active power, reactive power, power factor, apparent power, frequency, positive and negative sequence voltage and current, four quadrant electrical energy, and 31st harmonic.

Fault recording: Save 64 points per cycle for 10 cycles, collect three-phase voltage or three-phase current. And it can display waveform graphics through LCD.

SOE event records and operation report records (1000 records).

The product meets the standard: the device can withstand the attenuation oscillation wave pulse interference test with frequencies of 1MHz and 100KHz specified in GB/T14598.13;
The device can withstand the strict level IV electrostatic discharge interference test specified in GB/T14598.14;