Product Core Brief
- Model: RET670 1MRK002246-BD
- Brand: ABB
- Series: Relion® 670
- Core Function: Fast transformer differential protection and control
- Type: Numerical transformer protection relay / IED
- Key Specs: IEC 61850 support; up to 6 restraint CT inputs; harmonic restraint logic
- Condition: New Original (New Surplus), not refurbished
RET670 is designed for transformer, autotransformer, generator-transformer unit, phase-shifting transformer, and shunt reactor protection applications.
Product Introduction
ABB RET670 1MRK002246-BD is intended for transformer protection applications where CT performance, selective fault clearing, and dependable substation communication matter more than oversized touchscreen features. It is widely used in utility substations, refinery power systems, generator-transformer blocks, and industrial HV distribution systems handling both two-winding and three-winding transformer arrangements.
In retrofit projects, this relay is often selected because its differential protection algorithm maintains low CT burden requirements while still supporting high-speed fault detection and harmonic restraint during transformer energization. Built-in vector group compensation and IEC 61850 integration reduce external hardware requirements and simplify digital substation migration. Exact firmware revision, hardware variant, and I/O mapping should always be verified before commissioning or replacement.
