The ABB RET615 Transformer Protection and Control Relay is a dedicated solution designed for the protection, control, and monitoring of power transformers. As part of the Relion® 615 series, it combines advanced protection functions with flexible communication capabilities.
The RET615 is suitable for utility and industrial applications, providing reliable performance in both conventional and digital substations. Its compact design and preconfigured functionality make it easy to deploy and operate.
Comprehensive transformer protection functions
Differential protection with high sensitivity
Thermal overload and backup protection
IEC 61850 communication support
Pre-engineered application configurations
Compact and user-friendly design

The RET615 includes transformer differential protection as its main feature, providing fast and selective fault detection for internal faults such as winding failures and insulation breakdown.
Additional protection functions include overcurrent, earth fault, and thermal overload protection, ensuring complete coverage for various operating conditions.
The relay continuously monitors transformer parameters, including current, voltage, and temperature conditions. It provides real-time data to operators for improved system visibility.
Control functions enable efficient management of transformer operations, including switching and automation integration.
The RET615 supports IEC 61850 communication, enabling seamless integration into modern digital substations. It also supports other protocols for compatibility with existing systems.
Its communication capabilities ensure reliable data exchange and support advanced automation applications.
Power transformer protection
Utility substations
Industrial power systems
Renewable energy installations
The ABB RET615 Transformer Protection and Control Relay provides reliable and efficient protection for transformers. Its advanced functionality and flexible communication features make it an essential component in modern power systems.



