Low Voltage AC Asynchronous Motor Protection Relay

Evolution

What’s the Evolution of Relay?

Thermal Relay	Temperature Relay	Digital Relay	Integrated Relay
Over Load, Phase Failure	Protect Temperature	Various Protection	Protection, Control, Networking
Single function, Low Effectiveness, Inability to Network, and Energy Consumption.	Single Function, Difficult to Implement	Primarily for Protection	Strong Functions

Highlight

What’s the Function of Acrel ARD3M Motor Protection Relay?

Measure

U I P Q S PF F EP EQ, etc
2-63^rd Harmonic

Protect

Over Load
Short Circuit
Phase Failure
Phase Sequence
Over Current
Leakage Current

Control

Protect type
Manual mode
Two-step model
Double speed mode
Star triangle three successive
Power Shake and start again

Communication

Standard Configuration:
2 circuits of RS485 Modbus-RTU
Optional:
Profibus DPV1
Profinet
Ethernet Modbus-TCP

ARD3M is suitable for low-voltage motor circuits with rated voltage up to 690V and rated current up to 800A.
Integrating protection, measurement, control, communication, operation and maintenance
Perfect protection function ensures the safe operation of the motor
Logic programmable function to meet a variety of control methods
Choose different communication modules to meet the needs of on-site communication
Split structure, composed of main body, display unit, transformer and communication module, suitable for installation in various cabinets

System

How does Acrel ARD3M Motor Protection Relay work?

Why use Low Voltage AC Asynchronous Motor Protection Relay?

Real-time monitoring of motor circuit current and voltage.
Real-time monitoring of motor operation status.
Realize overload, phase failure and other protections according to current and voltage conditions.
Simplify MCC design. (Secondary components such as ammeter, voltmeter, and transmitter can be integrated).
Connect to SCADA and DCS systems to transmit corresponding data to related systems.

Application

What fields can Acrel's ARD3M be used in?

Wastewater treatment

Oil and gas

Chemicals

Mining

Paper

Onsite Photo

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Installation

How to Install the Acrel ARD3M Motor Protection Relay?

Specification

What’s the Specification of Acrel ARD3M Motor Protection Relay?

The standard switch quantity of ARD3M is 10DI and 6DO, and the switch quantity type is shown in Table 1:

Main switch classification

Code

DI is the dry contact and the external power supply

of DO is AC220V

DI is the wet contact, the input is DC110V, and the

the external power supply of DO is AC220V

DI is the wet contact, the input is DC220V, and the

the external power supply of DO is AC220V

DI is the wet contact, AC220V input, and DO

the external power supply is AC220V

The corresponding to relation between ARD3M current specification and the rated current and power of the applicable motor is shown in Table 2:

Protector current specification (A)	Ratio setting	Primary side coil number of transformer	Applicable scope of motor (kW)	Suitable for motor Rated current range(A)
1	Support	5	0.12-999	0.1-5000
5	Support	1	0.12-999	0.5-5000
25	Not Support	1	3-11	6.3-25
100	Not Support	1	15-45	25-100
250	Not Support	1	55-132	63-250
800	Not Support	1	160-250	250-800

Additional features of ARD3M are shown in Table 3:

Additional function		Code	Additional function	Code
2-63 harmonic voltages and currents		H	Waveform recording	WR
Additional Communication Module (optional)	1channel PROFIBUS DPV1communication	CP	Anti-electric shock function	SU
	2 channel PROFIBUS DPV1 communication	2CP	Insulation monitoring	Ri
	Ethernet communication (MODBUS TCP protocol)	MCE	Electric leakage protection	L
	1channel Profinet communication	PNET	Fault record	SR
1 channel 4-20mA output		M1	2 channel 4-20mA output	M2
Wireless capability (can be optional when Color dot matrix LCD is selected)		WIFI

See Table 4 for the ARD3M Display Module:

Display module	Code
Black and white dot matrix LCD, module size 98×60, opening 92×55(unit mm)	60L1
Color dot matrix LCD, module size 98×60,cut-out 92×55(Unit mm)	60L2

Parameter

What’s the Parameter of Acrel ARD3M Motor Protection Relay?

Technical parameters	Technical indicators
Protector auxiliary power supply	Support two power modules, AC 220V power module (AC85-265V/DC100-300V) default, AC 380V power module (AC/DC100-415V) optional
Rated working voltage of the motor	AC220V / 380V / 660V，50Hz / 60Hz
Rated operating current of the motor	1 (0.1A-5000A)	External current transformer
	5 (0.1A-5000A)
	25（6.3A-25A）
	100（25A-100A）
	250（63A-250A）
	800（250A-800A）
Relay output contact capacity	Impedance load	AC250V、10A
Switching input	10 channels of passive dry contact (active DC110V, DC220V, AC220V input can be optional)
Communication	Standard supplied	2channel MODBUS RTU communication
Communication	Optional（only one can be selected）	1-2 channel PROFIBUS DPV1communication、1channel PROFINET communication、Ethernet communication（MODBUS TCP protocol）
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

Request Information & Quotation

Kindly Fill out the Form below and tell us more about your Requirements,
We would like to provide Suitable Solution for You.
or Send us Email directly, [email protected]