ABB|REF610|Feeder Protection Relay
Description
The ABB REF610 is a feeder protection relay designed for the protection, control, and supervision of utility and industrial power distribution systems.
Features
Provides overcurrent and earth-fault protection. Includes user-friendly interface and flexible configuration. Supports communication for remote monitoring.
Technical Specifications
Electrical Ratings
- Rated voltage: 100–240 V AC/DC
- Frequency: 50/60 Hz
- Power consumption: < 10 W
Protection Functions
- Overcurrent protection: 0.1–40 x In, delay 0.05–300 s
- Earth-fault protection: 0.02–20 x In, delay 0.1–300 s
- Phase discontinuity: 10–100%, delay 0.1–60 s
- Thermal protection: 50–150% of nominal, time constant 1–999 min
Measurement Accuracy
- Current: ±2% of nominal value
- Voltage: ±1.5% of nominal value
- Time: ±0.5% or ±25 ms
Inputs and Outputs
- Analog inputs: 3 current, 1 voltage
- Digital inputs: 2, rated 24–265 V DC
- Relay outputs: 3, 5 A at 250 V AC
- Communication ports: 1 (RS-485 or optional IEC 61850)
Environmental Conditions
- Operating temperature: -25°C to +55°C
- Storage temperature: -40°C to +85°C
- Humidity: 5–95%, non-condensing
- Ingress protection: IP54 (front)
Dimensions and Weight
- Width: 130 mm
- Height: 170 mm
- Depth: 160 mm
- Weight: 1.8 kg
ABB|REF610|Feeder Protection Relay

Description
The ABB REF610 is a feeder protection relay designed for the protection, control, and supervision of utility and industrial power distribution systems.
Features
Provides overcurrent and earth-fault protection. Includes user-friendly interface and flexible configuration. Supports communication for remote monitoring.
Technical Specifications
Electrical Ratings
- Rated voltage: 100–240 V AC/DC
- Frequency: 50/60 Hz
- Power consumption: < 10 W
Protection Functions
- Overcurrent protection: 0.1–40 x In, delay 0.05–300 s
- Earth-fault protection: 0.02–20 x In, delay 0.1–300 s
- Phase discontinuity: 10–100%, delay 0.1–60 s
- Thermal protection: 50–150% of nominal, time constant 1–999 min
Measurement Accuracy
- Current: ±2% of nominal value
- Voltage: ±1.5% of nominal value
- Time: ±0.5% or ±25 ms
Inputs and Outputs
- Analog inputs: 3 current, 1 voltage
- Digital inputs: 2, rated 24–265 V DC
- Relay outputs: 3, 5 A at 250 V AC
- Communication ports: 1 (RS-485 or optional IEC 61850)
Environmental Conditions
- Operating temperature: -25°C to +55°C
- Storage temperature: -40°C to +85°C
- Humidity: 5–95%, non-condensing
- Ingress protection: IP54 (front)
Dimensions and Weight
- Width: 130 mm
- Height: 170 mm
- Depth: 160 mm
- Weight: 1.8 kg