- Model: RET650 1MRK008516-BD
- Brand: ABB
- Series: Relion 650
- Core Function: Provides differential and backup protection for three-winding transformers
- Type: Transformer Protection IED
- Key Specs: 3-winding support with single breaker, stabilized differential, IEC 61850
Condition: New Original (New Surplus), not refurbished. Limited stock with full traceability.
The RET650 1MRK008516-BD serves as a dedicated transformer protection IED configured for three-winding setups with single circuit breaker arrangements. It delivers fast, selective protection for power transformers in substations and industrial sites.
This variant (A05, 3W/1CB, Ver. 1.3) balances core differential functions with practical I/O for real-world deployments. Maintenance teams value its withdrawable design and protocol support that eases integration into existing station buses. It handles two- or three-winding transformers, autotransformers, and related units with low CT requirements.
Key Technical Specifications
- Application: 3-winding transformer protection, single breaker (3W/1CB)
- Protection Principle: Stabilized differential (T3WPDIF) with harmonic blocking
- Rated Frequency: 50/60 Hz
- Current Inputs: Multiple CT inputs (typically 8I+2U or expanded)
- Voltage Inputs: Configurable VT inputs for supervision
- Communication: IEC 61850, IEC 60870-5-103, Modbus RTU/TCP
- Event Recording: Disturbance and event recorder with non-volatile storage
- Power Supply: 24-250 V DC / 100-240 V AC (verify nameplate)
- Operating Temperature: -25 to +55°C (standard for series)
- Mounting: 19″ rack or flush mount, modular design
- Firmware: Version 1.3 range typical; record exact revision on receipt
- Additional: OLTC position support via BCD in relevant configs
