- Model: RET650 1MRK008516-BA
- Brand: ABB
- Series: Relion 650
- Core Function: Protects and controls power transformers in transmission and distribution systems
- Type: Transformer Protection IED
- Key Specs: Differential protection (biased/stabilized), IEC 61850 station bus, 50/60 Hz operation
Condition: New Original (New Surplus), not refurbished. Limited stock available with traceable documentation.
The RET650 1MRK008516-BA is a dedicated transformer protection IED built for secure, selective, and fast protection of two- and three-winding transformers, autotransformers, and generator-transformer units. It sees wide use in utility substations and industrial power distribution where reliable differential and backup protection is critical.
Field crews often select this unit for its balance of functionality and straightforward integration into existing 650 series setups. It delivers key functions like harmonic-restrained differential protection with inrush blocking, overcurrent stages, and voltage supervision while supporting modern protocols for easier SCADA integration. Typical installations show solid performance in reducing fault clearing times on critical transformers.
Key Technical Specifications
- Application: Transformer protection and control (2/3 winding, auto, generator step-up)
- Protection Principle: Stabilized differential with 2nd/5th harmonic blocking
- Rated Frequency: 50/60 Hz
- Current Inputs: Multiple phase and neutral CT inputs (precise, configurable)
- Voltage Inputs: Configurable VT inputs
- Communication: IEC 61850, IEC 60870-5-103, Modbus (verify exact ports for this order code)
- Event Recording: Integrated disturbance and event recorder with non-volatile memory
- Power Supply: Standard 24-250 V DC / 100-240 V AC range (confirm nameplate)
- Operating Temperature: -25°C to +55°C (typical for 650 series; verify in datasheet)
- Mounting: 19″ rack or flush, withdrawable design where applicable
- Firmware: Record revision on receipt (common versions in V2.x range)
