- Model: RET670
- Brand: ABB
- Series: Relion 670
- Core Function: Comprehensive protection, control, and monitoring for power transformers and shunt reactors
- Type: Transformer Protection IED
- Key Specs: Stabilized differential protection, IEC 61850, customizable I/O and functions
Condition: New Original (New Surplus), not refurbished. Limited stock with traceability.
The RET670 is a high-performance transformer protection IED from the Relion 670 series designed for demanding applications involving two- or three-winding transformers, autotransformers, and shunt reactors. It excels in transmission and large industrial substations where flexibility and advanced functionality matter.
This IED stands out for its extremely fast differential protection with automatic CT ratio matching and vector group compensation. It requires minimal CT performance and supports extensive customization of protection, control, and monitoring functions. Engineers often deploy it when standard 650 series units lack sufficient I/O capacity or specialized logic.
Key Technical Specifications
- Application: All types of power transformers and shunt reactors (custom/pre-configured)
- Protection Principle: Stabilized differential (T2WPDIF / T3WPDIF) with 2nd/5th harmonic blocking
- Rated Frequency: 50/60 Hz (wide range operation)
- Current Inputs: Up to multiple 5A or 1A CT inputs (configurable)
- Voltage Inputs: Multiple VT inputs for supervision and control
- 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 (typical)
- Mounting: 19″ rack or flush, modular hardware design
- Firmware: Record exact revision (varies by version 1.x / 2.x)
- Additional: Extensive local/remote control, user-programmable logic
