Description
System placement in protection hierarchy
Typical deployment positions:
- Feeder outgoing lines (MV to HV levels)
- Inter-substation transmission lines
- Cable interconnectors between substations
- Mixed overhead + transformer-in-zone line protection schemes
In a standard substation architecture:
- Busbar protection: REB670
- Bay control: REC650 / REC670
- Line protection: ABB RED615E_1G HBDDAEAGAHC1BNA11G
This separation matters during fault studies.
Key technical specifications (field-relevant summary)
Based on ABB Relion 615 platform configuration data:
- Series: ABB Relion 615
- Device type: Line differential protection relay
- Protection principle: Two-end phase-segregated differential protection
- Communication: Fiber optic link or pilot wire between substations
- Protocols: IEC 61850, Modbus RTU, DNP3 (configuration dependent)
- Inputs/outputs: ~14 binary inputs, ~9 binary outputs (variant dependent)
- Frequency: 50/60 Hz systems
- Application: overhead lines, cable feeders, looped distribution networks
- Environment: −25°C to +55°C typical industrial class range
