ABB BGDR-11 Simulation output module

Description

ABB BGDR-11 Simulation output module

Product Dimensions：

Product Description

The ABB BGDR-11 module is an optional printed circuit board (PCB) for ABB’s advanced Unitrol Automatic Voltage Regulators (AVR). It serves as a safe and isolated interface to extract crucial control and measurement data from the AVR’s internal digital processing core.

The term “Simulation Output” refers to the fact that it converts internal digital values (representing real physical quantities within the excitation system) into standard industrial analog signals (typically $0-10\ \text{V}$ or $0/4-20\ \text{mA}$) for monitoring purposes. It ensures that external monitoring devices do not interfere with the primary AVR control loops.

Product Parameters

Product Advantages

• High Fidelity Monitoring: Provides accurate and reliable analog representation of critical internal control variables (e.g., field current, output voltage), essential for performance analysis and trend monitoring.

• Safety and Isolation: Features robust galvanic isolation between the high-voltage excitation system and external monitoring equipment, protecting personnel and instrumentation.

• Non-Intrusive: The outputs are purely for monitoring; the module does not interfere with the active control loops of the AVR, ensuring control stability.

• Standardized Interface: Outputs are compliant with industry-standard $4-20\ \text{mA}$ or $0-10\ \text{V}$ signals, making it easy to interface with existing SCADA, DCS, or PLC systems.

Important Precautions

• Configuration: The specific variable assigned to each output channel (e.g., Output 1 = Field Current, Output 2 = Terminal Voltage) must be correctly configured in the main Unitrol control software before use.

• ESD Sensitivity: Handle the BGDR-11 with care, ensuring strict Electrostatic Discharge (ESD) protection (e.g., use a grounding wrist strap) to prevent component damage.

• Output Load: Ensure the external monitoring equipment (load) connected to the current outputs does not exceed the module’s maximum specified impedance to maintain accuracy.

• System Integrity: Only install or replace this module when the Unitrol excitation system is completely de-energized and electrically locked out.

Product Applications

The BGDR-11 is essential in applications requiring external oversight and recording of generator excitation performance:

• Power Plant Control Rooms: Feeding signals to dedicated control panel meters and trend recorders for operator supervision.

• SCADA/DCS Integration: Providing analog inputs to the plant’s Supervisory Control and Data Acquisition (SCADA) or Distributed Control System (DCS) for historical data logging and reporting.

• Protection Systems: Providing isolated inputs for specialized generator protection relays that need to monitor excitation levels.

• Testing and Commissioning: Used to verify the dynamic response and stability of the AVR system during startup and performance testing.

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