About ABB RET650 SMALL PROTECTION RELAY (ONLY DISPLAY)

ABB RET650 SMALL PROTECTION RELAY (ONLY DISPLAY)

RET650 offers the best possible coverage for power transformer winding turn-to-turn faults and the unique negative sequence internal/external fault discriminator is faster than a conventional stabilized transformer differential protection function.

Advanced Protection for Small Transformers

The ABB RET650 delivers comprehensive transformer protection, handling everything from overcurrents and earth faults to differential protection in one device. Its microprocessor-based design enables reliable, rapid response to critical events, thus minimizing downtime and enhancing both system safety and longevity. With its compact design and flush/panel mounting, it fits easily into a wide variety of installations.


Robust Communication and Control Features

Integrated Ethernet, RS232, and RS485 ports mean that the RET650 supports various communication protocols including IEC 61850, Modbus, and DNP3. Coupled with LED indications for instant status feedback, the relay enables seamless supervision, easy integration with SCADA, and comprehensive remote/onsite control. Additionally, its LCD graphical display provides clear, user-friendly operational information.


User-Friendly Operation and Maintenance

The RET650 is designed for practical field use: Firmware can be easily updated via communication ports, event recording is precise with time tagging, and the device is engineered for minimal power consumption. Plug-in terminals, rear supply connection, and robust insulation further streamline installation and maintenance processes.