Overview

The ABB REG615 is a specialized generator protection and control relay from the Relion® 615 series. It is designed to protect small to medium‑sized synchronous generators in utility and industrial power systems. The relay offers comprehensive protection against a variety of electrical faults, abnormal operating conditions, and mechanical stresses.

Moreover, it incorporates advanced communication protocols such as IEC 61850, ensuring seamless interoperability with modern digital substations. The REG615 is preconfigured and factory-tested, which simplifies commissioning and reduces engineering time.

Combining protection, control, measurement, and supervision functions in one compact unit, the REG615 is widely used in power generation plants, industrial facilities, and distributed energy systems where operational reliability and efficiency are critical.

Technical Data

Typical Applications

• Synchronous generator protection in utility power plants.

• Industrial facilities with captive generation units needing reliable fault detection.

• Distributed energy systems like biomass, hydro, and small gas turbine plants.

• Backup protection for generator‑transformer blocks in substations.

• Retrofit projects, replacing older electromechanical generator relays with modern digital solutions.

FAQ

Q1: What is the ABB REG615 used for?
A1: It protects, controls, and supervises small to medium synchronous generators in utility and industrial systems.

Q2: Which protective functions are included?
A2: The REG615 provides differential protection, overcurrent, earth-fault, loss of excitation, over/under voltage, and over/under frequency protection.

Q3: How does REG615 simplify commissioning?
A3: It is delivered preconfigured and factory-tested, reducing engineering effort and setup time.

Q4: What communication protocols are supported?
A4: It supports IEC 61850, Modbus®, DNP3, and IEC 60870‑5‑103, ensuring interoperability with digital substations.

Q5: Is REG615 part of a larger product family?
A5: Yes, the REG615 is part of the Relion® 615 series, which also includes relays for feeder, transformer, and motor protection.