Product Core Brief
- Model: RET670 1MRK002816-AB
- Brand: ABB
- Series: Relion® 670
- Core Function: Transformer differential protection and bay control
- Type: Numerical transformer protection relay / IED
- Key Specs: IEC 61850 communication; harmonic restraint; 48–250 V supply
- Condition: New Original (New Surplus), not refurbished
ABB describes the relay as a numerical transformer protection and control platform intended for utility substations, industrial plants, and generation facilities.
Product Introduction
ABB RET670 1MRK002816-AB is built for transformer protection jobs where CT saturation, inrush current behavior, and communication reliability matter more than cosmetic interface features. It is commonly installed in transmission substations, refinery power systems, generator-transformer blocks, and industrial HV distribution networks requiring differential protection with IEC 61850 integration.
One reason this relay still appears in retrofit projects is its stable multi-slope differential logic and low CT burden requirement. In practice, that reduces nuisance trips during transformer energization and simplifies replacement work when older electromechanical or early numerical relays are removed. Typical deployments include two-winding and three-winding transformer applications with disturbance recording and remote engineering through PCM600. Exact firmware branch and hardware configuration should always be verified before commissioning.
Key Selling Points & Differentiators
- ABB RET670 1MRK002816-AB combines transformer differential protection, restricted earth fault, thermal overload, breaker failure logic, and programmable control functions in one IED platform.
- Multi-slope percentage bias characteristics improve stability during CT saturation, transformer inrush, and external fault conditions.
- 2nd and 5th harmonic restraint functions reduce false trips during transformer energization and overexcitation events.
- Incoming stock should pass serial verification, startup diagnostics, communication handshake checks, binary I/O simulation, and minimum 24-hour powered runtime before shipment. Test reports with startup photos or video evidence should be available.
- Compared with older transformer relays, this platform provides IEC 61850 communication, disturbance recording, programmable logic, and detailed SOE event logging.
- Not recommended for uncontrolled “drop-in” replacement where firmware revision, CT polarity mapping, or GOOSE datasets are undocumented.
