ABB PCD235B101 exciter control module

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• 1. Product Model & Basic Introduction

  Model: PCD235B101 (also referenced as 3BHE032025R0101)
  This exciter control module from ABB’s Unitrol series is designed for synchronous generator excitation systems. It regulates the excitation current, thus controlling the generator’s output voltage and reactive power, ensuring stable operation of the power system.

  2. Technical Specifications

  • Model: PCD235B101 / 3BHE032025R0101. Xiongba Automation+26G Controls+2

  • Dimensions: Approx. 15.0″ × 6.0″ × 3.0″ (≈ 38.1 cm × 15.2 cm × 7.6 cm). Xiongba Automation

  • Weight: Approx. 1.5 kg. Xiongba Automation+1

  • Control supply input range: 24–230 V AC/DC (based on available data) www.plcym.com

  • Ambient operating temperature: -25 °C to +70 °C (based on available data) www.plcym.com

  • Regulation accuracy: ±0.25%. www.plcym.com+1

  • Communication interfaces: Typically includes Ethernet, RS-485, etc. Xiongba Automation+1

  • Functional capabilities: Excitation regulation, voltage & reactive power control, system protection (over-excitation, under-excitation, over-voltage, under-voltage). Xiongba Automation

  3. Advantages and Features

  • High-precision control: Reduces voltage fluctuations and stabilizes generator output under dynamic load conditions.

  • Wide applicability: Suitable for various control supply voltages and environmental conditions.

  • Strong integration & communication: Enables seamless connection with modern control architectures and remote monitoring.

  • Comprehensive protection features: Enhanced safety for generator and excitation system.

  • Modular and service-friendly design: Facilitates installation, replacement and maintenance.

  • Enhances system performance & reliability: Improved power quality, extended equipment life and better system efficiency.

  4. Typical Application Areas

  • Synchronous generators in large power plants (thermal, hydro, gas-turbine).

  • Stand-by or auxiliary generation systems in industrial facilities.

  • Marine or offshore power generation units.

  • Renewable energy systems using synchronous generation (e.g., pumped-storage hydro, wind farms).

  • Industrial automation or heavy-duty equipment requiring stable electrical supply and control.

  5. Usage Notes & Precautions

   

  • Before installation, ensure the control supply voltage matches the module’s requirements and proper grounding is established.

  • Follow the wiring diagram precisely, particularly for the excitation winding, sensor inputs and communication terminals.

  • Install the module in a clean, ventilated environment with minimal vibration and corrosive conditions.

  • If operating at high altitude or extreme temperatures, check for derating or suitable variant.

  • Perform regular system checks: excitation response, communication status, alarms.

  • Use the module as part of a full control/protection scheme (including generator protection, excitation supply, monitoring).

  • During maintenance or replacement, disconnect both control supply and excitation supply, observe ESD precautions and avoid inadvertent module damage or system mis-operation.