ABB RET670 1MRK002816-AC Transformer Protection and Control IED

Product Overview

The ABB RET670 (1MRK002816-AC) is a premium digital protection device within the Relion® 670 series, specialized for power transformers. It supports two-winding, three-winding, and autotransformer configurations, providing high-speed differential and backup protection. 

Technical Specifications

• Model Number: RET670 1MRK002816-AC.

• Product Series: Relion 670.

• Application: 2/3 Winding Transformers, Autotransformers, Step-up Transformers.

• CT Inputs: Supports up to 6 Current Transformer (CT) inputs.

• Standard Configuration: ANSI A(AB)/B(BB).

• Main Functions: Overcurrent, Grounding, and Negative Sequence Protection.

• Frequency Range: Wideband operation for disturbances and generator ramp-up/down.

• Operating Voltage: Typically 110kV and above.

Key Features and Engineering Advantages

• Versatile Transformer Support: A single unit can protect various assets, including phase-shifting transformers, shunt reactors, and railway traction transformers.

• Complex Breaker Logic: Seamlessly manages single, dual, or multi-circuit breaker configurations, providing comprehensive coverage for sophisticated switchyard designs.

• Wideband Operational Stability: Specifically designed to remain stable and functional during frequency fluctuations typical of generator start-up or major system disturbances.

• Advanced Backup Protection: Standard ANSI configurations provide a robust second line of defense including negative sequence and grounding protection to detect asymmetrical faults.

• High-Fidelity Monitoring: Integrated voltage control and measurement functions allow for real-time monitoring of transformer health and power quality.

• IEC 61850 Native: Ensures full interoperability with digital substation architectures, supporting high-speed GOOSE messaging for interlocking and tripping.