The DP-20C series intelligent monitoring device is independently developed and produced by Xuji Measurement and Control Instrument Co., Ltd., which realizes the protection and measurement of circuits, transformers, motors, and capacitors with a distribution level of 10kV and below; It can be installed dispersedly on high-voltage switchgear or centrally assembled into screens.

Basic protection: Specific function selection table for different protected devices and protection requirements.

DI/DO: 12 DI AC/DC dual-use, 6 DO. The 6th DO is the outlet of the power loss alarm relay.

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): SOE event records relay actions and DI status event records; The operation report records the fault information of relay protection action.

The product meets the standard: the device can withstand the pulse interference test of attenuation oscillation waves with frequencies of 1MHz and 100KHz specified in GB/T14598.13 (the common mode voltage amplitude of the first half wave is 2.5KV, and the differential mode is 1KV);

The device can withstand the strict level IV electrostatic discharge interference test specified in GB/T14598.14;

Main features of the device:

Adopting 32-bit high-performance embedded ARM as the CPU and adopting real-time multitasking embedded operating system. The protection function does not rely on the communication network, and whether the network is paralyzed or not does not affect the normal operation of the protection.

Reliable fieldbus technology, supporting dual networks, fieldbus can use either 1-channel RS485 or dual RS485.

Adopting a large screen Chinese character LCD display, the human-machine interface is friendly and can display various measurement parameters, 1000 operation reports, fault recording and other measurement statistical data.

Provide fault recording function and SOE events.

It has the functions of "comprehensive protection" and "measuring instrument", and has independent measurement CT. One device has two functions, saving users costs.

Complete software and hardware self-test function.