ABB RET620 Transformer Management Relay

Product Description

The RET620 from ABB is an advanced transformer management relay specifically designed to protect, control, measure, and supervise power transformers. This versatile device is well-suited for use in utility and industrial power distribution networks, including two-winding power transformers and power generator-transformer blocks. As part of ABB's Relion® family, the RET620 offers a range of advanced features and customization options to meet specific application needs.

Technical Specifications

• Protection Functions:

• Advanced differential protection with high inrush stability.

• Restricted earth fault protection (high-impedance or low-impedance options).

• Overcurrent, thermal overload, and voltage protection.

• Arc protection for enhanced safety.

• Control and Monitoring:

• Integrated voltage regulation for transformers with motor-driven on-load tap changers.

• Trip-circuit supervision and self-supervision features.

• Extensive event logging and disturbance recording capabilities.

• Communication Protocols:

• Supports IEC 61850 Edition 1 and 2, including redundancy (HSR and PRP).

• Modbus, DNP3, and IEC 60870-5-103 compatibility.

• High-accuracy time synchronization via IEEE 1588 V2 Precision Time Protocol.

• Design and Usability:

• Compact, withdrawable plug-in unit for easy installation and testing.

• Large graphical display with customizable single-line diagrams (SLDs).

• Web-browser-based HMI for remote access and configuration.

• Environmental Specifications:

• Operating Temperature: -25°C to +55°C.

• Humidity: 5% to 95% non-condensing.

• Compliance with IEC standards for electromagnetic compatibility and safety.