ABB RET615 Transformer Protection and Control Relay

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Product Model

ABB RET615 Transformer Protection and Control Relay

Product Overview

The ABB RET615 is a high-performance digital transformer protection and control relay designed for distribution and generation substations. It integrates overcurrent, differential, earth fault, overload, overvoltage, undervoltage, and other protection functions, supporting remote monitoring and intelligent control. RET615 enhances transformer operational safety and reliability while optimizing maintenance and system automation.

Technical Specifications

• Model: RET615

• Type: Transformer Protection and Control Relay

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

• Voltage Input: 100–600 V AC/DC

• Protection Functions: Overcurrent, differential, earth fault, overload, overvoltage/undervoltage protection

• Control Outputs: Relay contacts for tripping, alarms, and remote control

• Communication Interfaces: IEC 61850, Modbus RTU, DNP3 (optional)

• Sampling Rate: 16 kHz high-speed data acquisition

• Operating Time: < 30 ms (differential protection)

• 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. Comprehensive protection: Multiple integrated protection logics ensure safe transformer operation.

2. Fast response: High-speed differential and overcurrent protection enhances system reliability.

3. Intelligent control: Automatic tripping, alarm, remote control, and event recording.

4. Multi-protocol communication: IEC 61850, Modbus RTU, DNP3 support for integration and remote monitoring.

5. Data logging and event analysis: Records fault events and electrical parameters for maintenance analysis.

6. Industrial-grade design: Temperature and vibration resistant, suitable for harsh environments.

Application Areas

• Distribution and generation substations

• Transformer protection and control in power systems

• Transmission and distribution line monitoring

• Large industrial transformer protection

• Transformer management in renewable energy grids

Precautions

1. Verify relay rated current, voltage, and protection configuration 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, communication interfaces, and event records for long-term reliable operation.

5. Avoid frequent false tripping or exceeding rated parameters to extend relay life.

The structure and details of the product：

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