| Function | Standard configuration | Optional | |
| Measurement Function | Three-phase alternating current | √ | |
| Neutral conductor current | √ | ||
| Residual current | √ | ||
| Defencive 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 switch | √ | |
| Record Function | 20 Single fault record | √ | |
| 20 Event Record | |||
| Display Function | Liquid-crystal display | √ | |
| Setpoint Setting Function | Operation Panel Modification | √ | |
| Communication Amendment | |||
ALP220-EF Earth Fault Relay
● Application: Low-voltage distribution systems (up to 380V)
● Purpose: Provides overcurrent, earth-fault, residual current, unbalance, and short-circuit protection
● Auxiliary Supply: AC/DC 85～265V
● Current Inputs: (4 channels) 1A or 5A (selectable, depending on external CT)
● Current Measurement Range: 10%Ie ～ 1000%Ie
● Measurement Accuracy: ±2%
● Residual Current Input: 30mA～1000mA (requires optional residual current transformer)
● Frequency Range: 45Hz～65Hz, accuracy ±0.2Hz
● Relay Outputs: 2 x SPDT (Form C), resistive load: AC 250V 5A / DC 30V 5A
- Fast And Safe Logistics
- Sample Available
