Acrel ALP220-EF Low-Voltage Earth Fault Overcurrent Relay

Name: Acrel ALP220-EF Low-Voltage Earth Fault Overcurrent Relay
Brand: Acrel
SKU: ALP220-EF
Availability: InStock

● Application Voltage: up to 380V
● Current Input: 1A/5A CT secondary input
● Protection: overcurrent, earth fault, current unbalance, short circuit
● Residual Current: 30–1000mA, optional with external RCT
● Communication: RS485, Modbus-RTU
● Relay Output: 2×SPDT
● Protection Class: Front IP54; Terminals IP20

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Information

Parameter

Function

Download

Parameter

Key Parameters

Essential specifications for quick product selection

SYSTEM & POWER

Up to 380V

Low-voltage application

Auxiliary power: AC/DC 85–265V

CURRENT INPUT

1A / 5A

CT secondary input

Ia / Ib / Ic / In current channels

COMMUNICATION

RS485

Standard communication interface

Protocol: Modbus-RTU

COMPACT SIZE

96 × 96mm

Front size: 96 × 96mm

Cutout: 88 × 88mm

Housing: 90 × 90 × 46mm

RELAY OUTPUT

2 × SPDT

Dual-channel relay output

AC 250V / 5A

DC 30V / 5A

OPTIONAL FUNCTION

30–1000mA

Residual current measurement

External RCT required

Panel-mounted design:
88 × 88mm cutout · Front IP54 · Terminals IP20 · Working temperature -20℃ to +70℃

Characteristic

Wiring

Protection

Key Parameters Essential specifications for quick product selection SYSTEM & POWER Up to 380V Low-voltage application Auxiliary power: AC/DC 85–265V CURRENT INPUT 1A / 5A CT secondary input Ia / Ib / Ic / In current channels COMMUNICATION RS485 Standard communication interface Protocol: Modbus-RTU COMPACT SIZE 96 × 96mm Front size: 96 × 96mm Cutout: 88 × 88mm Housing: 90 × 90 × 46mm RELAY OUTPUT 2 × SPDT.

Technical data

Parameter	Value
Protocol	Modbus-RTU COMPACT SIZE 96 × 96mm
Front size	96 × 96mm
Cutout	88 × 88mm
Housing	90 × 90 × 46mm RELAY OUTPUT 2 × SPDT Dual-channel relay output AC 250V / 5A DC 30V / 5A OPTIONAL FUNCTION 30–1000mA Residual current measurement External RCT required Panel-mounted design: 88 × 88mm cutout Front IP54 Terminals IP20 Working temperature -20℃ to +70℃

Panel-mounted. Send us the rated values of your circuit and the supply voltage; we confirm the ordering code, wiring diagram and register list within one working day.

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Technical Parameter	Qualification
Accessory Power Supply	Voltage Range	AC/DC 85–265V
Accessory Power Supply	Power Dissipation	—
Input	Current Specifications	ABCN (4-channel): 1A/5A	10%Ie–1000%Ie, ±2%
	Residual Current Specification	30mA–1000mA	±2%
	Frequency	45Hz–65Hz	±0.2Hz
Output	Output Method	Dual-channel Single-pole Double-throw Switch
Output	Output Capacity	Resistive Load; AC 250V 5A / DC 30V 5A
Installation and Usage Environment	Workplace Scenario	No direct exposure to rain or snow; no corrosive gases; no severe vibration
	Relative Humidity	≤95% RH, No Condensation
	Working Temperature	-20℃ to +70℃
	Storage Temperature	-40℃ to +70℃
	Altitude	≤2000m
	Installation / Protection Level	Embedded Installation: 88 × 88mm	Panel: IP54; Terminals: IP20
Security Classification	EMC	Level III

Function		Standard Configuration	Optional
Measurement Function	Three-phase Alternating Current	√
	Neutral Conductor Current	√
	Residual Current		√
Protective Function	Inverse-time Overcurrent Protection	√
	Inverse-time Grounding	√
	Three-stage Time-delayed Overcurrent Protection	√
	Three-stage Time-delayed Ground Fault Protection	√
	Current Imbalance	√
	Leakage Current		√
Communication Function	Modbus-RTU	√
Digital Output Function	2 Single-pole Double-throw Switches	√
Record Function	20 Fault Records	√
Record Function	20 Event Records	√
Display Function	Liquid-crystal Display	√
Setpoint Setting Function	Operation Panel Modification	√
Setpoint Setting Function	Communication Amendment	√