Acrel ARD3T Automatic Motor Relay Protection Device

Name: ARD3T Automatic Motor Relay Protection Device
Brand: Jiangsu Acrel Micro-grid Research & Development Institute

ARD3T automatic motor relay protection device can be divided into 7 modules including main module, measurement module, switch module, analog module, temperature module, communication module and liquid crystal module. It is small in size and compact in structure, and is suitable for motors with rated voltage up to AC660V, rated current up to AC800A, and rated frequency 50/60Hz. It can be directly installed and used in low-voltage control terminal cabinets and various drawer cabinets of 1/4 module or above, which improves the reliability and automation level of the control circuit.

Specifications of ARD3T automatic Motor Relay Protection Device

Parameters

Technical parameters	Technical indicators
Protector auxiliary power supply	AC/DC110/220V or AC380V, power consumption 15VA
The rated working voltage of the motor	AC380V / 660V, 50Hz / 60Hz
Rated operating current of the motor	1 (0.1A-5000A)	Adopt measurement module
	5 (0.1A-5000A)
	25（6.3A-25A）
	100（25A-100A）
	250（63A-250A）	Adopt outlay current transformer and measurement module
	800（250A-800A）
Leakage	50mA-1A or 3A-30A	Adopt measurement module and leakage current transformer
Relay output contact capacity	Impedance load	AC250V, 6A; DC24V, 6A
Master switching input and output	4DI/4DO
Switching value module	4DI/3DO
Temperature module	Type of external sensor: PT100, PT1000, Cu50, PTC, NTC Channel of the sensor: 3 channels Sensor's corresponding measurement range: PT100/PT1000: -50°C～+500°C Cu50: -50°C～+150°C PTC/NTC: 100Ω～30kΩ
Analog module	2-channel 4-20mA input and 2-channel 4-20mA output
Master communication	RS485 Modbus_RTU
Communication module	double 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 IP45 (installed on the cabinet panel)
Installation category	Level III

Features of ARD3T Automatic Motor Relay Protection Device

The module is small in size and supports rail installation and screw installation;

The additional modules are powered by the bus and do not need an external auxiliary power supply;

With upper computer configuration software, it is convenient for customers to configure parameters and program settings;

Two channels of 4-20mA input measurement and two channels of 4-20mA transmission output can be realized by adding analog modules. The corresponding parameters of 4~20mA transmission output can be set freely;

It can realize 3-way temperature measurement protection by adding a temperature module. The types of external sensors that can be connected are: PT100, PT1000, Cu50, PTC, NTC;

Profibus-Dp communication can be realized by adding Profibus module.