Acrel ARD3 Smart Motor Protector With LCD/Digital Display

Name: ARD3 Smart Motor Protector With LCD/Digital Display
Brand: Jiangsu Acrel Micro-grid Research & Development Institute

ARD3 smart motor protector with LCD/digital display adopts a modular product structure, including the main body (protection control function module), transformer detection module, and remote display module. According to the needs, the functional modules or accessories of ARD3 can be selected to form a motor control and protection unit with electrical components such as contactors and motor starters. It has functions such as remote automatic control, on-site direct control, panel indication, signal alarm, and field bus communication. It is suitable for fields such as coal mines, petrochemicals, smelting, electric power, ships, and civil buildings.

Specifications of ARD3 Smart Motor Protector with LCD/Digital Display

Parameters

Technical Parameters

Accuracy	U, I: Class 1.5
Frequency	Range: 45-65Hz
Auxiliary power supply	AC85V-265V/DC100V-350V
SOE event recorder	Record 8 fault messages
Installation	Main body: DIN 35mm
Installation	Display unit: Panel mounted
Dimension(LWH)	81.5mm86mm90mm

Technical parameters	Technical indicators
Protector auxiliary power supply	AC85-265V/DC100-350V,power consumption 15VA
The rated working voltage of the motor	AC380V / 660V, 50Hz / 60Hz
Rated operating current of the motor	1 (0.1A-5000A)	Small special current transformers
	5 (0.1A-5000A)
	25（6.3A-25A）
	100（25A-100A）
	250（63A-250A）	Special current transformers
	800（250A-800A）
Relay output contact capacity	Impedance load	AC250V、10A
Relay output contactor, rated negative capacity	5 channels,AC 250V 6A
Switching input	9 channels, optocoupler isolation
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 2
Protection grade	Main body IP20, split display module IP54 (installed on the cabinet panel)
Installation category	Level III

Features of ARD3 Smart Motor Protector With LCD/Digital Display

It is suitable for motors with rated voltage up to AC690V, rated current up to AC800A, and rated frequency 50/60Hz;

The measurement function is divided into basic measurement (current parameters) and additional measurement (voltage, power, phase sequence, residual current (leakage current);

It has a standard RS-485 communication interface and adopts Modbus-RTU and Profibus-DP communication protocols to ensure the fast and reliable communication of the upper computer;

It has a DC4-20mA analog output interface, which is directly connected to the DCS system and can monitor the field equipment.