RET620 transformer protection measurement and control device ABB

The RET620 transformer protection measurement and control device constitutes the differential main protection of double-winding power transformer and power generator transformer sets. The RET620 also includes an optional automatic voltage regulation function, and in – line tap switch. The RET620 is also suitable for all Y-Δ connections with single or double buses with one or two circuit breakers and multiple switch switches. The device supports a large number of manual and electric isolation switch and ground switch operation. The number of controllable devices depends on the input and output requirements of other applications. The amount of available I/O is increased as required by ABB’s RIO600 remote I/O device.

The RET620 transformer protection measurement and control device is featured to support the IEC61850 communication standard of substation. The supported communication covers both vertical and horizontal communication. The horizontal communication includes GOOSE messages with switching signal and analog signal as well as the setting based on IEC 61850-8-1. The device also supports DNP3, IEC 60870-5-103, and Modbus® protocols. With PRP or HSR protocols, the RET620 provides an optional Ethernet port for delay-free redundant Ethernet or a self-healing RSTP ring network communication in the event of a communication failure. This solution eliminates the effects of single points of failure and improves communication reliability. Applicable to Ethernet-based IEC 61850, Modbus®, and DNP3 protocols.

The RET620 transformer protection measurement and control device is a member of the 620 family of ABB’s Relion® product family.