Overview

The ABB RET650 is part of the Relion® 650 series of intelligent electronic devices (IEDs), providing a complete solution for transformer protection. It safeguards power transformers and reactors against faults such as short circuits, overloads, and differential imbalances. Moreover, the RET650 integrates protection, control, measurement, and supervision functions in a single unit, reducing system complexity. Its modular design and flexible configuration make it suitable for both new installations and retrofit projects.

Valued for high sensitivity, fast response, and advanced communication capabilities, the RET650 ensures seamless integration into modern substation automation systems.

Technical Data

Typical Applications

Transformer Differential Protection

Detects internal faults in two- and three-winding transformers.

Reactor Protection

Provides selective protection for shunt and series reactors.

Substation Automation

Integrates with IEC 61850-based systems for advanced monitoring and control.

Retrofit Projects

Modular design allows easy upgrading of legacy protection systems.

Industrial Power Systems

Used in petrochemical plants, steel mills, and manufacturing facilities requiring reliable transformer protection.

Example:
In distribution and transmission substations, RET650 units combine transformer protection and bay control in a single IED. In addition, industrial operators use it to enhance reliability, reduce downtime, and simplify maintenance in critical power networks.

FAQ

Q1: What is the main advantage of ABB RET650?
A1: It integrates transformer protection, control, and monitoring functions into a single compact IED.

Q2: Which communication protocols are supported?
A2: IEC 61850, SPA, Modbus, and IEC 60870‑5‑103.

Q3: Can RET650 be used for reactors?
A3: Yes, it provides reliable protection for both shunt and series reactors.

Q4: Is the RET650 suitable for retrofit projects?
A4: Absolutely. Its modular design and flexible configuration make it ideal for upgrading legacy systems.

Q5: What industries typically use this relay?
A5: Utilities, petrochemical plants, steel mills, and industrial facilities requiring reliable transformer protection.