Overview

The ABB RET615E_1G is part of ABB’s Relion® 615 series, a family of intelligent electronic devices (IEDs) designed for medium-voltage applications. This relay is tailored for two-winding power transformers, unit transformers, and step-up transformers, including generator-transformer blocks.

• Differential Protection: Provides fast and selective fault detection inside transformers, protecting against internal faults.

• Integrated Control & Monitoring: Combines control, measurement, and supervision functions, reducing the need for external devices and improving system efficiency.

• Compact Design: Ideal for switchgear and substation applications, where space is often limited.

• IEC 61850 Compliance: Enables seamless communication and integration into digital substations for modern automation systems.

This relay integrates protection, control, measurement, and supervision into one device, offering a versatile and efficient solution for modern power distribution systems.

Technical Data

Typical Applications

• Utility substations requiring reliable transformer differential protection.

• Industrial power distribution where compact relays integrate protection and control in one device.

• Power generation plants protecting generator step-up transformers.

• Digital substations leveraging IEC 61850 communication for automation and efficient data exchange.

For example, in a medium-voltage substation, the RET615E_1G ensures differential protection for a step-up transformer, while also monitoring breaker health and supervising trip circuits to enhance system reliability and safety.

FAQ

Q1: What is the primary function of the RET615E_1G?

A1: The RET615E_1G provides transformer differential protection alongside integrated control, measurement, and supervision functions.

Q2: Is it IEC 61850 compliant?

A2: Yes, the RET615E_1G fully supports IEC 61850, enabling seamless integration into digital substations.

Q3: Can it be used for generator step-up transformers?

A3: Yes, it is specifically designed for unit and step-up transformers, including generator-transformer blocks.

Q4: What communication protocols are supported?

A4: It supports IEC 61850, Modbus, and DNP3 for flexible integration into various communication infrastructures.

Q5: Which industries typically use this relay?

A5: The RET615E_1G is used in utilities, power generation, petrochemical, and heavy industrial sectors, where reliable transformer protection is essential.