l Device features

Chinese character LCD display, user-friendly human-machine interface

The display screen and main body adopt a split design

It integrates the functions of "comprehensive protection" and "measuring instruments".

RS485 communication and Profibus communication are optional

l Application field

DP-12AThe series of low-voltage intelligent measurement and control devices are installed on low-voltage switchgear of 400V distribution level, and can also be installed in groups. Suitable for PC cabinets in power plants, mines, chemical plants, steel mills, machinery factories, etc. (PC power supply generally uses frame type circuit breakers and is equipped with fully functional intelligent or electronic release devices), and can also be used for feeder circuits of motors above 75KW (switches use plastic shell circuit breakers).

l protection function

DPM-12AMotor protection:

Two stage overcurrent protection (quick break)

Overcurrent inverse time limit protection

overload protection

low voltage protection

Vector zero sequence current protection

Either leakage protection (external leakage protection CT) or zero sequence current protection (self-produced zero sequence or external zero sequence protection CT)

Two stage negative sequence current protection

overvoltage protection

Two stage negative sequence current protection

overvoltage protection

overheat protection

Motor start-up protection

locked-rotor protection

l Measurement and control function

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

Switch input: 9DI

Switching output: 5DO

Analog output: 2-channel 4-20mA transmission output

SOEEvent records and operation report records

l communication

Supports 2-channel 485 communication

Also supports 1-way Profibus communication and 1-way 485 communication

l DP-12ASeries measurement and control device complete set of current transformers

1、current transformer

This current transformer is a three-phase current transformer used in conjunction with low-voltage intelligent measurement and control devices. Due to the variety of motor types, starting methods, power factors, load conditions, etc., to ensure the measurement margin of the transformer, it is usually recommended to choose the highest current specification for the transformer.

2Zero sequence current transformer

External transformer CT for leakage protection and zero sequence current protection.