AC Digital Cbct Earth Leakage Relay for Earth Leakage Protection

• Customization: Available
• Theory: Electromagnetic Relay
• Phase: 3
• Model NO.: ELR-4MA
• Electricity Type: Ac
• Number of Pole: 3
• Load: Medium Power Relay
• Protective Characteristics: Enclosed Relay
• Action Principle: Electromagnetic Type
• Size: 78*90*60 mm
• Type: Electric Parameter Relay
• Transport Package: Carton
• Specification: 10*10cm
• Trademark: Blue Jay
• Origin: China
• Production Capacity: 1000PCS Per Month

Product Description

Product Description

The ELR-4MD DC Earth Leakage Relay is an advanced protection device designed to enhance the safety and reliability of electrical systems. With a hall effect current sensor (HCT), it continuously monitors the residual current in the busbars or branches of the DC system. When the residual current exceeds the preset threshold, the relay promptly outputs an alarm signal, ensuring early detection of potential faults.

Equipped with alarm function, the ELR-4MD ensures that alarm signals remain clearly indicated until received the reset signal, facilitating easy fault diagnosis and troubleshooting. ELR-4MD is critical for preventing equipment damage, minimizing downtime, and safeguarding personnel against electrical hazards.

Feature

1. 2XSPDT relay outputs;
2. Hall current sensor measurement;
3. Remote test/rest connections;
4. Standard 35mm din rail mounting;
5. RS485 Modbus communication;

Application

1. Smart grid system;

1. Medium and low voltage systems;
2. Commercial and residential buildings;
3. Utilities and power distribution systems;
4. Motor control panels and switchboards;
5. DC system leakage current measurement;
6. Industrial control system (PLC, SCADA, DCS).

Specification

Parameter	Value
Power supply	85-265Vac/dc, optional 48VDC
Power consumption	≤4VA
Frequency	50/60Hz, Accuracy ±0.01Hz
Leakage current alarm threshold	1-30mA / 5-100mA can be set
Time delay	50ms-10sec, can be set
Communication	RS-485 MODBUS-RTU
Display	LCD with backlit
Withstand voltage	2.5KV 1min
Insulation	Input, output, power supply to shell >5MΩ
Storage environment	-40~70°C
Working environment	-25~55°C Altitude ≤2500m, 0~95%RH, non-condensing, non-corrosive gas

Wiring Diagram