ABB REG670

Technical Specifications

• Electrical Parameters:
  • Rated Voltage: Up to 36 kV for generator terminals and 110–250 V DC for auxiliary power .
  • Rated Current: Supports CT inputs up to 5,000 A with configurable ratios (1 A or 5 A secondary) .
  • Frequency Range: 47.5–63 Hz for both 50 Hz and 60 Hz systems .
• Input/Output Interfaces:
  • Analog Inputs: 16 channels for current (I) and voltage (U) measurements, supporting direct CT/PT connections .
  • Digital Inputs/Outputs: 32 DI and 16 DO with opto-isolation for breaker control, alarms, and interlocking .
  • Communication Protocols: IEC 61850, DNP3, Modbus TCP, and PROFIBUS DP for SCADA integration .
• Environmental Ratings:
  • Operating Temperature: -20°C to +70°C (-4°F to +158°F) with humidity up to 95% non-condensing .
  • Protection Class: IP66/67 for harsh environments, including corrosive conditions in power plants .
  • Vibration/Shock Resistance: Withstands 5 g (50–2,000 Hz) and 50 g (11 ms duration) shocks .
• Physical Dimensions:
  • Size: 230 mm (width) × 300 mm (height) × 130 mm (depth), weighing approximately 4.3 kg (9.5 lbs) .
  • Mounting: Rack-mountable design for easy installation in control panels .

Functional Features

1. Comprehensive Protection Suite:
   • Differential Protection: Fast-acting generator differential (87G) with harmonic restraint and CT saturation detection, operating in <15 ms under fault conditions .
   • Stator/Rotor Earth Fault Protection:
     • 100% Stator Coverage: Injection-based (861850-9-2) or third harmonic (3U0) methods to detect ground faults at any point in the winding .
     • Rotor Earth Fault: Sensitive injection-based protection (64R) with adjustable impedance thresholds .
   • Overcurrent/Undervoltage: Multi-step inverse-time overcurrent (51/50) and under/overvoltage (27/59) protection with voltage-controlled tripping .
   • Specialized Functions: Pole slip (78), loss of excitation (40), negative sequence (46), and overspeed protection for turbine-driven generators .
2. Modular Configuration:
   • Three Standard Configurations:
     • A20: Generator differential + backup protection (12 AI, 7I + 5U) .
     • B30: Dual differential protection for generator-transformer blocks (24 AI, 9I + 3U × 2) .
     • C30: Combined generator and transformer protection (24 AI, 9I + 3U + 6I + 6U) .
   • Field-Programmable Logic: User-configurable function blocks (e.g., timers, logic gates) for custom control sequences .
3. Diagnostics and Monitoring:
   • Self-Supervision: Continuous monitoring of internal components (CPU, memory, communication) with fault alarms and event logging .
   • Disturbance Recorder: Captures high-resolution waveform data (up to 1,000 samples/cycle) for post-fault analysis .
   • Synchrophasor Measurement: Supports PMU (Phasor Measurement Unit) functionality for grid stability analysis .
4. Advanced Control Capabilities:
   • Synchronization: Auto-synchronization (25) with voltage/frequency matching for generator paralleling .
   • Apparatus Control: Direct breaker control (52) with interlocking and failure detection (50BF) .
   • Adaptive Load Shedding: Dynamic load management based on real-time power system conditions .

Application Scenarios

1. Power Generation Facilities:
   • Thermal/Hydroelectric Plants: Protects steam, gas, and hydro turbines from faults like stator winding short circuits and rotor ground faults .
   • Combined Cycle Plants: Integrates with ABB’s Symphony Plus DCS for coordinated control of gas turbines and generators .
   • Nuclear Power Stations: Meets stringent safety requirements with redundant protection schemes and fail-safe design .
2. Industrial and Renewable Energy:
   • Wind Farms: Provides grid-compliant protection for doubly-fed induction generators (DFIGs) during grid faults .
   • Solar Power Plants: Controls voltage and frequency stability in photovoltaic (PV) inverter-coupled generators .
   • Mining/Manufacturing: Protects large industrial generators in remote locations with extended temperature and humidity tolerance .
3. Grid-Supporting Applications:
   • Synchronous Condensers: Maintains reactive power stability in weak grids by emulating synchronous generator behavior .
   • Microgrids: Enables seamless transition between grid-connected and islanded modes with advanced load balancing .

Operational Advantages

• Reliability: Redundant power supplies and hot-swappable modules ensure continuous operation during maintenance .
• Interoperability: Seamless integration with ABB’s Symphony Plus and third-party systems via open protocols .
• Cost Efficiency: Reduces equipment count by consolidating protection, control, and metering into a single IED .
• Lifecycle Support: Spare parts availability for 15 years post-discontinuation and firmware updates for evolving grid standards .

Key Considerations

• Installation:
  • CT/PT Connections: Requires precise phase alignment and ratio matching to avoid differential protection maloperation .
  • Cable Length: Maximum 100 m for analog signals; 200 m for digital interfaces with repeaters .
• Configuration:
  • Software Tools: ABB’s PCM600 and Relion® Manager enable graphical programming and setting customization .
  • Cybersecurity: Built-in IEC 62351-8 compliance for secure communication in smart grid environments .

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