ABB REF615R feeder protection relay

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ABB REF615R Feeder Protection Relay – Product Information

1. Product Overview

The ABB REF615R is a high-performance feeder protection relay designed for medium- and low-voltage feeder protection.
It provides overcurrent, under/overvoltage, short-circuit, and earth fault protection, enabling fast and reliable protection and automation of power systems.
REF615R supports communication interfaces for SCADA integration and smart grid monitoring and data acquisition.

2. Technical Specifications

• Model: REF615R

• Type: Feeder Protection Relay

• Rated Voltage: Medium- and low-voltage systems (0.4 kV – 35 kV)

• Protection Functions: Overcurrent, under/overvoltage, short-circuit, earth fault

• Measurement Functions: Current, voltage, power, frequency

• Communication Interfaces: IEC 61850, Modbus RTU/TCP, DNP3, Profibus

• Trip Time: ≤ 20 ms (short-circuit protection)

• Power Supply: 24–48 V DC or 110–230 V AC/DC

• Operating Temperature: -20 ℃ to +60 ℃

• Storage Temperature: -40 ℃ to +85 ℃

• Protection Class: IP20

• Mounting: Panel or DIN rail

• Dimensions: Approx. 144 × 144 × 120 mm

• Weight: Approx. 1.5 kg

• Certifications: CE, UL, IEC 60255

3. Features and Advantages

1. High-precision protection – Accurate measurement and fast trip ensure power network safety.

2. Integrated multifunction – Combines overcurrent, under/overvoltage, short-circuit, and earth fault protection.

3. Smart communication – Supports IEC 61850, Modbus, and other protocols for smart grid integration.

4. Fast response – Minimal trip time isolates faults quickly, reducing equipment damage risk.

5. Flexible installation – Panel or DIN rail mount for easy system integration.

6. High reliability – Industrial-grade design for stable long-term operation in complex power environments.

4. Application Areas

• Medium- and low-voltage feeder line protection

• Industrial and factory distribution systems

• Urban power distribution networks

• Substation and distribution automation systems

• Smart grid monitoring and management

• Renewable energy integration protection

5. Precautions

1. Installation and wiring must be performed by qualified electrical engineers.

2. Disconnect power before wiring to prevent electric shock or relay damage.

3. Do not exceed rated voltage, current, or environmental temperature limits.

4. Regularly check terminals and connections for reliable contact.

5. Use protective measures in high humidity, dusty, or corrosive environments.

6. Maintenance and parameter adjustments should follow ABB official manuals.

The structure and details of the product：

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