ABB REF615EG Feeder Protection Intelligent Electronic Device (IED)

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1. Product Overview

The ABB REF615EG Feeder Protection Intelligent Electronic Device (IED) is an advanced protection and control device designed for medium- and low-voltage distribution systems. It integrates overcurrent, overload, and short-circuit protection with communication capabilities, enabling intelligent monitoring and protection of feeders and distribution networks. The REF615EG supports the IEC61850 communication protocol, allowing seamless integration with substation automation systems for remote monitoring, fault recording, event analysis, and intelligent control. Its modular design ensures high reliability, suitable for industrial, commercial, and infrastructure distribution systems.

2. Technical Specifications

• Model: REF615EG

• Product Type: Feeder Protection IED

• Protection Functions: Overcurrent, overload, short-circuit protection

• Rated Voltage: 0.4 kV – 36 kV systems

• Rated Current: According to CT ratio, typically 1 A / 5 A

• Auxiliary Supply: 110‑240 V AC/DC

• Communication Interfaces: Ethernet, RS‑485; supports IEC61850, Modbus TCP/RTU

• Measurement Functions: Three-phase voltage, current, power, frequency, energy, etc.

• Operating Time: Millisecond-level response (depending on protection settings)

• Event Recording: Fault waveform recording, event logging, fault location

• Operating Temperature: ‑25 ℃ to +55 ℃

• Degree of Protection: IP54 (front panel)

• Mounting Method: Panel or DIN rail mounting

• Standards Compliance: IEC 60255, IEC 61850, IEC 60947 series

3. Advantages and Features

1. Comprehensive Protection
   Integrated overcurrent, overload, and short-circuit protection ensures feeder and equipment safety.

2. Intelligent Monitoring & Data Acquisition
   Supports event logging, fault waveform recording, remote monitoring, and data analysis for enhanced system visibility.

3. Modular Design
   Front panel display, control buttons, and interface modules designed for easy maintenance and upgrades.

4. High Reliability
   Industrial-grade hardware and redundancy design ensure stable long-term operation.

5. Strong Communication Capabilities
   Supports IEC61850, Modbus protocols for seamless integration with automation systems.

6. Fast Response
   Millisecond-level operation quickly isolates faults, minimizing power system losses.

4. Typical Applications

• Feeder protection in medium- and low-voltage distribution systems

• Industrial plant distribution networks

• Commercial and office building power distribution

• Infrastructure and utility distribution systems

• Automated substations and smart distribution grids

5. Installation and Usage Notes

1. Confirm power supply, rated voltage, and system parameters match the IED before installation.

2. Wiring and maintenance must be performed with power off for safety.

3. Avoid prolonged use in high temperature, high humidity, or corrosive environments.

4. Regularly check communication interfaces and event recording functionality to ensure reliability.

5. Configure protection settings according to system load and safety requirements to prevent unwanted tripping.