Feature
- 2XSPDT relay outputs;
- Hall current sensor measurement;
- Remote test/rest connections;
- Standard 35mm din rail mounting;
- RS485 Modbus communication;
- Adjustable trip levels and time delay.
Technology of Electrical Automatic
ELR-4MD DC Earth Leakage Relay
ELR-4MD DC Earth Leakage Relay
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.
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.
Application
- Smart grid system;
- Medium and low voltage systems;
- Commercial and residential buildings;
- Utilities and power distribution systems;
- Motor control panels and switchboards;
- DC system leakage current measurement;
- 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 method
Dimension
Dimension: 78*90*60 mm W*H*D
Front view
Side view
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Chongqing Blue Jay Technology Co., Ltd. was founded by engineers with many years of experience. Focuses on the development, production and sales of power automation monitoring products and energy metering instruments.
1802, Building 2, No. 88, Jianxin East Road, Chongqing City, 400020, China
Liandong U valley Industrial Park,Hangzhou City, China
Jiangyin High-tech Zone, Jiangyin City, China