- Model: RET670 1MRK004816-AC
- Brand: ABB
- Series: Relion 670
- Core Function: Comprehensive protection, control, and monitoring for power transformers
- Type: Transformer Protection IED
- Key Specs: Stabilized differential, IEC 61850, configurable for 2/3 winding applications
Condition: New Original (New Surplus), not refurbished. Limited stock available.
The RET670 1MRK004816-AC is a transformer protection IED configured for demanding applications on two- and three-winding transformers, autotransformers, and shunt reactors. It sees service in transmission substations and large industrial sites requiring flexible, high-performance protection.
This specific variant delivers fast stabilized differential protection with automatic CT ratio and vector group compensation. It supports extensive I/O and logic customization while integrating seamlessly via modern protocols. Teams select the RET670 1MRK004816-AC when standard relays fall short on capacity or specialized functions. Typical deployments show reliable fault clearing and reduced downtime on critical assets.
Key Technical Specifications
- Application: 2/3 winding transformers, autotransformers, shunt reactors
- Protection Principle: Stabilized differential with 2nd/5th harmonic blocking
- Rated Frequency: 50/60 Hz
- Current Inputs: Multiple 1A/5A CT inputs (configurable)
- Voltage Inputs: Multiple VT inputs for supervision
- Communication: IEC 61850, IEC 60870-5-103, Modbus, DNP3
- Event Recording: Advanced disturbance and event recorder
- Power Supply: 24-250 V DC / 100-240 V AC (verify nameplate)
- Operating Temperature: -25 to +55°C
- Mounting: 19″ rack or flush mount, modular
- Firmware: Record exact revision on receipt
- Additional: User-programmable logic, extensive control functions
Incoming Inspection Verify packing list and import declaration. Cross-check serial number against label for authenticity. Visual inspection confirms no corrosion, scratches, repair marks, or aging. Check for included accessories and documentation.
Live Functional Test Conducted on RET670-compatible test rack with simulator. Power-on self-check validates LEDs and boot behavior. Comms handshake tested on IEC 61850 and other protocols. Full I/O simulation including differential logic. Continuous run exceeds 24 hours with temperature monitoring. Test Report generated; photo/video evidence available.
Electrical Parameter Tests Insulation resistance >10 MΩ at 500 V. Ground continuity verified.
Firmware / Configuration Verification Firmware revision read and recorded. DIP/jumper and hardware configuration documented with photos.
