ABB RET615 Transformer Protection and Control Relay

The RET615 is a dedicated transformer protection and control relay designed for the protection, control, measurement, and supervision of power transformers. It is suitable for use with unit and step-up transformers, including generator-transformer blocks in utility and industrial power distribution systems.

Scope of Application

• Protection for two-winding power transformers

• Advanced differential protection with high inrush current stability

• Suited for unit and step-up transformers in:

• Utility substations

• Industrial power networks

• Generator-transformer blocks

Production Benefits

• Compact and versatile all-in-one solution integrating:

• Protection

• Control

• Monitoring

• Supervision

• Pre-configured for common vector group settings for fast and easy commissioning

• Customizable for specific application needs

• Withdrawable plug-in unit for easy installation, testing, and maintenance

• Large graphical display with user-defined single-line diagrams (SLDs)

• Local access or remote access via web-browser-based HMI

• Backed by ABB’s life-cycle services for long-term support

Key Product Features

• Differential protection with integrated voltage protection and measurement

• Neutral earthing support, compatible with:

• High-impedance REF

• Low-impedance/numerically set REF

• Optional arc flash protection and high-speed outputs

• Supports IEC 61850 Editions 1 & 2, including:

• HSR (High-availability Seamless Redundancy)

• PRP (Parallel Redundancy Protocol)

• GOOSE messaging

• IEC 61850-9-2 LE for reduced wiring and monitored communication

• IEEE 1588 V2 for sub-microsecond time synchronization and precision Ethernet-based communication

• Supports additional communication protocols:

• Modbus

• DNP3

• IEC 60870-5-103