ABB RER620 recloser relay

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Product Model

ABB RER620 Recloser Relay

Product Overview

The ABB RER620 is an intelligent recloser relay designed for distribution networks, enabling automatic detection and isolation of faulted lines and restoration of service. It offers highly reliable fault protection, strong communication capabilities, and supports multiple network protocols. The RER620 can be integrated into distribution automation (DA) systems, improving power reliability, reducing outage time, and allowing remote monitoring and operation.

Technical Specifications

• Model: RER620

• Type: Recloser Relay

• Current Input: 1 A / 5 A (rated on CT side)

• Voltage Input: 57.7–300 V AC / DC

• Relay Outputs: 4–6 programmable contacts

• Communication Interfaces: RS-485, IEC 61850, Modbus RTU

• Reclosing Function: Supports single or multiple reclosing operations

• Operating Time: < 30 ms

• Operating Temperature: –25 °C … +70 °C

• Protection Class: IP54 (front), IP20 (rear)

• Power Supply: 110–240 V AC/DC

• Certifications: IEC 60255, IEC 61850, CE

Advantages & Key Features

1. Intelligent reclosing: Automatically detects line faults and performs reclosing, reducing outage duration.

2. Multi-protocol communication: Supports IEC 61850, Modbus RTU for remote monitoring and integration.

3. High reliability: Industrial-grade design resistant to high temperature and vibration.

4. Multi-function protection: Overcurrent, short-circuit, and earth fault protection enhance distribution system safety.

5. Programmable relay outputs: Flexible configuration for control and alarm signals.

6. Data logging & event analysis: Records fault events and operational history for maintenance and analysis.

Application Areas

• Distribution network automation systems

• Outdoor/indoor ring main units and switchgear

• Low/medium voltage distribution line protection

• Power system remote monitoring and intelligent management

• Renewable energy grid integration control

Precautions

1. Verify power supply, current, and voltage parameters match the system before installation.

2. Follow ABB manuals strictly for wiring and configuration.

3. Ensure installation environment is dry, ventilated, and free from dust and high temperature.

4. Regularly check relay status and communication interfaces to ensure proper remote monitoring.

5. Avoid frequent reclosing or exceeding rated current to extend relay service life.

The structure and details of the product：

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