Product Core Brief
- Model: RET670 1MRK002816-AB
- Brand: ABB
- Series: Relion® 670
- Core Function: Transformer differential protection and control
- Type: Numerical transformer protection relay / IED
- Key Specs: IEC 61850 communication; 2nd/5th harmonic restraint; 48–250 V supply
- Condition: New Original (New Surplus), not refurbished
Product Introduction
ABB RET670 1MRK002816-AB is intended for transformer protection applications where fault selectivity, CT saturation handling, and dependable substation communication matter more than decorative HMI features. It is widely used in utility substations, refinery power systems, generator-transformer blocks, and industrial HV distribution systems requiring fast differential protection with IEC 61850 integration.
In retrofit projects, this relay is frequently selected because its low-impedance differential protection places relatively low demands on CT performance while still maintaining stable operation during transformer energization and external faults. Built-in vector group compensation, programmable logic, disturbance recording, and GOOSE messaging reduce external hardware requirements and simplify digital substation migration. Exact firmware branch, hardware configuration, and I/O mapping should always be verified before commissioning or replacement.
Key Selling Points & Differentiators
- ABB RET670 1MRK002816-AB combines transformer differential protection, restricted earth fault protection, thermal overload, breaker failure logic, voltage regulation, and programmable control functions in one IED platform.
- Multi-slope percentage bias characteristics improve stability during CT saturation, transformer inrush current, and overexcitation events.
- 2nd harmonic and 5th harmonic restraint reduce nuisance trips during transformer energization and overflux conditions.
- IEC 61850, MMS, GOOSE, Modbus, and DNP3 support simplify integration into SCADA and modern digital substations.
- Incoming stock should pass serial verification, startup diagnostics, communication handshake testing, 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 adds COMTRADE disturbance recording, configurable function charts (CFC), detailed SOE logs, and PCM600 engineering support.
- Not recommended for uncontrolled “drop-in” replacement projects where firmware revision, CT polarity mapping, or IEC 61850 datasets are undocumented.
