Acrel ARD2M 3 Phase Motor Protection Relay

Name: ARD2M 3 Phase Motor Protection Relay
Brand: Jiangsu Acrel Micro-grid Research & Development Institute

ARD2M 3 phase motor protection relay is suitable for low-voltage motor circuits with rated voltage up to 660V and rated current up to 800A. It integrates protection, measurement, control, communication, and operation and maintenance. Its complete protection functions ensure the safe operation of the motor, and it has logic programmable functions, which can meet various control methods.It is composed of a main body and a transformer. The main body and the transformer can be combined into one or installed separately, and can be adapted to various cabinets.

Parameters of ARD2M 3 Phase Motor Protection Relay

Parameters

Technical parameters	Technical indicators
Protector auxiliary power supply	AC85-265V/DC100-350V
The rated working voltage of the motor	AC220V / 380V, 50Hz / 60Hz
Rated operating current of the motor	1 (0.1A-5000A)	Integrated/Split current transformer
	5 (0.1A-5000A)
	25（6.3A-25A）
	100（25A-100A）
	250（63A-250A）	Split current transformer
	800（250A-800A）
Relay output contact capacity	Impedance load	AC250V, 10A
Switching input	8 channels of passive dry contact (active DC110V, DC220V, AC220V input can be optional)
Communication	RS485 Modbus_RTU, Profibus_DP
Environment	Working temperature	-10ºC～55ºC
	Storage temperature	-25ºC～70ºC
	Relative humidity	≤95﹪No condensation, no corrosive gas
	Altitude	≤2000m
Pollution levels	Class 3
Protection grade	Main body IP20, split display module IP54 (installed on the cabinet panel)
Installation category	Level III

Features of ARD2M 3 Phase Motor Protection Relay

It supports power parameter measurement (U, I, P, Q, S, PF, F, EP, EQ), current and current unbalance, current positive sequence, negative sequence, zero sequence component, voltage, three-phase voltage phase angle, residual current;

Optional anti-shock function: it supports immediate restart after shaking power, and restart after voltage loss;

It is equipped with MODBUS_RTU communication as standard, optional PROFIBUS DP communication, and supports up to 2 communication interfaces;

It can be equipped with a 4-20mA analog output interface, which can be connected with the DCS system to monitor the field equipment;

It has various event records such as failure record, start record, stop record, DI displacement record and restart record.

Its display interface is liquid crystal display, which supports Chinese/English switching.