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ABB REF630 Feeder Protection and Control Device 

1. Key Parameters

• Product Series: Relion 630 (ABB’s dedicated series for medium-voltage distribution protection)
• Core Functions: Feeder protection, local/remote control, electrical parameter measurement, event logging, and communication
• Applicable Neutral Grounding Modes:
  • Ungrounded systems
  • Resistively grounded systems
  • Compensated ( Petersen coil) grounded systems
  • Directly grounded systems
• Rated Voltage (Uₙ):
  • Primary: Up to 36kV (50/60Hz, for MV distribution networks)
  • Secondary (voltage input): 100V (phase-phase) / 57.7V (phase-neutral)
• Rated Current (Iₙ):
  • Secondary (current input): 5A or 1A (compatible with standard current transformers, CTs)
• Protection Functions:
  • Overcurrent protection (50/51): Inverse/time-definite, phase/ground fault detection
  • Overload protection (49): Thermal modeling for feeder overload prevention
  • Earth fault protection (50N/51N): Sensitive ground fault detection (residual current-based)
  • Overvoltage/undervoltage protection (59/27): Phase/neutral voltage monitoring
  • Breaker failure protection (50BF): For failed circuit breaker tripping scenarios
  • Optional: Distance protection (21), differential protection (87), and frequency protection (81)
• Measurement Accuracy:
  • Current/Voltage: ±0.2% of full scale
  • Power (active/reactive): ±0.5% of full scale
  • Energy (kWh/kVARh): ±0.5% of full scale
• Communication Interfaces:
  • 2× Ethernet ports (IEC 61850 GOOSE/MMS, Modbus-TCP)
  • 1× RS-485 port (Modbus RTU)
  • Optional: IEC 60870-5-103, DNP3.0 for legacy system compatibility
• Power Supply:
  • DC: 24V/48V/110V/220V (±20% tolerance)
  • AC: 110V/220V (±15% tolerance, 50/60Hz)
  • Typical power consumption: ≤15W
• Operating Temperature Range: -25℃~+70℃ (-13℉~158℉)
• Storage Temperature Range: -40℃~+85℃ (-40℉~185℉)
• Protection Class: IP54 (front panel); IP20 (when installed in a cabinet); Complies with IEC 62271-202 (MV switchgear standards)

2. Product Features

• Comprehensive Protection Suite: Integrates overcurrent, earth fault, overvoltage/undervoltage, and optional distance/differential protection—covering all common feeder fault scenarios (e.g., phase short-circuits, ground faults, overloads) for fast, selective fault clearance.
• IEC 61850 Compliance: Supports IEC 61850 GOOSE (Generic Object Oriented Substation Event) for high-speed peer-to-peer communication and MMS (Manufacturing Message Specification) for data exchange—enabling smart substation integration and digitalization.
• Advanced Measurement & Logging: Provides high-precision electrical parameter measurement (current, voltage, power, energy) and records up to 1000 fault events/100 waveform captures—facilitating post-fault analysis and network optimization.
• Flexible Control Capabilities: Enables local control via front-panel HMI or remote control via SCADA/DCS systems; supports breaker closing/tripping, feeder isolation, and parameter adjustment—enhancing operational flexibility.
• Rugged Industrial Design: Wide temperature tolerance (-25℃~+70℃), IP54 front-panel protection, and anti-vibration performance (IEC 60068-2-6) ensure reliable operation in harsh substation environments (dust, humidity, temperature fluctuations).
• User-Friendly Configuration: Configurable via ABB PCM600 software (graphical interface) for customizing protection settings, communication protocols, and logic schemes—no low-level programming required, reducing commissioning time.

3. Application Fields

• Medium-Voltage Distribution Networks: Protects and controls overhead lines and cable feeders in urban, rural, and industrial MV distribution systems (10kV~36kV), ensuring stable power supply to residential, commercial, and industrial users.
• Industrial Power Grids: Safeguards feeders supplying power to manufacturing plants, data centers, and industrial parks—preventing production downtime caused by feeder faults and enabling efficient load management.
• Renewable Energy Integration: Manages feeders connecting solar farms, wind turbines, or small hydropower plants to the main grid—ensuring compliance with grid codes and protecting against renewable energy-related voltage/current fluctuations.
• Utility Substations: Used in medium-voltage substations for feeder protection and control, supporting digital substation architectures (via IEC 61850) and remote monitoring by utility operators.
• Critical Infrastructure: Protects feeders in hospitals, airports, and transportation hubs—ensuring uninterrupted power supply to critical loads (e.g., emergency systems, traffic signals) via fast fault isolation.

4. Precautions

• CT/PT Compatibility: Ensure current transformers (CTs) and voltage transformers (PTs) match the device’s secondary input ratings (5A/1A for CTs, 100V/57.7V for PTs)—mismatched transformers will cause measurement errors or protection failure.
• Protection Setting Calibration: Configure protection parameters (e.g., overcurrent pickup value, time delay) based on the feeder’s rated capacity and network topology—incorrect settings may lead to false tripping or delayed fault clearance.
• Communication Protocol Alignment: When integrating with SCADA/DCS systems, confirm compatibility between the device’s communication protocols (e.g., IEC 61850, Modbus) and the upper system—update firmware if necessary to resolve protocol mismatches.
• Power Supply Reliability: Use a dedicated, stable power supply (with surge protection) for the device; voltage fluctuations or power interruptions may disable protection functions, risking feeder damage.
• Environmental Protection: Install the device in a dust-proof, moisture-proof cabinet in substations; avoid direct exposure to sunlight, corrosive gases, or water—use heating/cooling units if ambient temperature exceeds the specified range.
• Regular Maintenance: Periodically verify protection settings, test tripping logic via PCM600 software, and inspect communication connections—replace the device if it fails self-diagnostics or shows signs of physical damage

The structure and details of the product：

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