Product Overview

The ABB GDC801B101 (3BHE051592R0101) is a Generator Differential Protection Relay designed to provide advanced protection and monitoring for generators in power generation systems. Part of ABB’s comprehensive protection relay portfolio, it ensures reliable detection of internal faults (e.g., phase-to-phase or ground faults) in generators, preventing equipment damage and enhancing grid stability. It is widely used in power plants, industrial facilities, and renewable energy installations.

Key Technical Specifications

Electrical Parameters

• Rated Voltage:
  • AC Voltage Input: 100–240V AC (phase-to-neutral), 50/60 Hz.
  • Auxiliary Supply: 24–250V DC/AC (configurable).
• Current Inputs:
  • Rated Current: 1A or 5A (selectable).
  • Frequency Range: 45–65 Hz.
• Accuracy:
  • Current Measurement: ±1% of rated value.
  • Operating Time: <20 ms for differential protection.

Protection Functions

1. Differential Protection (87G):
   • High-speed detection of phase and ground faults within the generator windings.
   • Adjustable pickup thresholds and slope characteristics.
2. Backup Protection:
   • Overcurrent (51V/51Q), Overvoltage (59), Undervoltage (27), and Frequency Protection (81O/U).
3. Stator Ground Fault Protection (64G):
   • Monitors insulation resistance and detects ground faults.
4. Negative Sequence Current Protection (46):
   • Protects against rotor overheating due to unbalanced currents.

Communication & Integration

• Communication Protocols:
  • IEC 61850 (Ed. 2) for substation automation.
  • Modbus RTU/TCP for SCADA integration.
  • DNP3.0 for utility-grade systems.
• Ports:
  • Ethernet (2 ports), RS-485, and USB for local configuration.
• Time Synchronization:
  • IEEE 1588 Precision Time Protocol (PTP) or IRIG-B.

Mechanical & Environmental

• Housing:
  • Compact, 19-inch rack-mount or panel-mounted design.
  • IP40 protection for dust resistance.
• Operating Conditions:
  • Temperature: -25°C to +70°C.
  • Humidity: 5–95% (non-condensing).
• Certifications:
  • IEC 60255, IEEE C37.90, CE, UL, and DNV-GL (for marine applications).

Key Features

1. Advanced Algorithms:
   • Adaptive differential protection with harmonic restraint to avoid false tripping during inrush currents.
2. Real-Time Monitoring:
   • Measures voltage, current, power, frequency, and harmonics.
   • Event recording (up to 1,000 events) with time-stamped logs.
3. User Interface:
   • LCD display with multilingual support.
   • Front-panel buttons for configuration and diagnostics.
4. Flexible Logic:
   • Programmable logic (CFC) for custom protection schemes.
5. Cybersecurity:
   • Role-based access control and password protection.
   • Secure communication via HTTPS and SSH.

Applications

• Power Plants: Protection of gas, steam, or hydro generators.
• Renewable Energy: Wind turbine and solar farm generators.
• Industrial Generators: Backup power systems and cogeneration units.
• Marine & Offshore: Protection in harsh environments.

Ordering Information

• Model: GDC801B101
• ABB Order Code: 3BHE051592R0101
• Accessories:
  • Current transformers (CTs), mounting kits, and communication cables.

Documentation & Support

• Configuration and settings via ABB PCM600 or Relay Configuration Tool.
• Detailed guidelines in the GDC801B101 Technical Manual (3BHE051592R0101).