- Model: RET670 1MRK004816-CB
- Brand: ABB
- Series: Relion 670
- Core Function: Protection, control, and monitoring for multi-winding power transformers
- Type: Transformer Protection IED
- Key Specs: Stabilized differential protection, IEC 61850, configurable I/O for complex schemes
Condition: New Original (New Surplus), not refurbished. Limited stock available.
The RET670 1MRK004816-CB is a transformer protection IED from the Relion 670 series built for three-winding transformer applications and similar demanding setups. It provides fast, selective protection in transmission substations and large industrial power systems.
This variant supports stabilized differential protection with automatic CT ratio matching and vector group compensation. It includes extensive backup functions, control capabilities, and protocol integration. Maintenance leads choose it when high I/O flexibility and customization are required beyond standard 650 series options. Field performance shows dependable operation on critical assets with reduced false trips during energization.
Key Technical Specifications
- Application: 3-winding transformers, autotransformers, shunt reactors (single breaker arrangements)
- 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 and backup
- 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 hardware
- Firmware: Record exact revision on receipt
- Additional: User-programmable logic, local/remote control functions
