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SPECIFICATIONS:
Part No: DS200FECBG1A
Manufacturer: General Electric
Function: Field Excitation Control for Synchronous Generator
Series: EX200
Input Signal Type: Analog voltage and current reference signals
Exciter Connector Type: 34
Terminal Block: 12
Power Supplies: 240 Vdc
Input Voltage Range: �10 V DC
Output Current Range: 0 � 5 A
Output Voltage: 0 � 120 V DC
Operating Temperature: 0�C to 70�C
Mounting: DIN rail
Availability: In Stock
Weight: 2.00 lbs
Size: 9.2 x 6.5 inches
Country of Origin: USA
Manual: GEI-100195
FUNCTIONAL DESCRIPTION:
DS200FECBG1A is an Exciter Crowbar Control Board manufactured and designed by General Electric and is part of the EX200 Series used in GE Excitation Turbine Control systems. The board receives reference signals from the EX2000 system and converts them into a regulated DC excitation current applied to the generator�s rotor windings. It maintains generator terminal voltage within tight tolerances, supports power factor control, and responds to transient load changes. The FECB includes analog and digital signal conditioning circuits, opto-isolated interfaces, and precision voltage and current sensing, ensuring accurate signal transmission and isolation between the control system and high-power excitation circuitry.
The board also integrates protective and diagnostic features critical for generator and system safety. Overvoltage, overcurrent, and short-circuit detection circuits monitor the excitation output and trigger alarms or trips in abnormal conditions. The module supports dynamic response during load swings or grid disturbances, providing fast corrective action to stabilize generator output. Additionally, onboard diagnostics provide continuous monitoring of excitation components, relay status, and fault conditions, transmitting real-time feedback to the EX2000 control system for predictive maintenance and fault mitigation. The combination of precise regulation, robust protection, and adaptive response makes the FECB essential for reliable and efficient generator operation.
INSTALLATION:
The Field Exciter Control Board should be installed in the designated I/O rack or module slot of the EX2000 Excitation Control System, ensuring correct orientation and secure mechanical mounting. Before installation, verify that all power sources to the control system and generator excitation circuits are completely de-energized to prevent electrical hazards. The board is designed for hot-swappable compatibility only if specified, but standard practice is to install it with the system powered down.
Electrical connections must follow the EX2000 wiring diagrams precisely. Input control signals from the EX2000 system, including voltage and current references, should be connected to the designated terminals, ensuring proper polarity and grounding. The excitation output terminals should be connected to the generator field windings via appropriate cabling, maintaining low impedance and avoiding routing near high-power AC lines to prevent noise interference. After installation, verify all jumpers and configuration settings (if applicable) for the specific generator and system requirements. Perform a system checkout by gradually energizing the excitation circuits while monitoring voltages, currents, and protective interlocks to confirm correct operation and ensure no faults are present.
OPERATIONS:
The board receives analog voltage and current reference signals from the EX2000 excitation regulator via isolated input terminals. These references are processed through precision DACs and conditioning circuitry to generate a regulated DC excitation output. The board employs a closed-loop control topology, continuously comparing the actual generator field current with the reference signal to adjust the excitation drive through high-speed power amplifiers.
Excitation output is monitored via integrated voltage and current sensors. Overvoltage, overcurrent, and short-circuit conditions are detected by dedicated protection comparators; faults trigger the EX2000 system interlocks to isolate the excitation output and generate diagnostic alarms. The board also supports dynamic response compensation, using fast signal conditioning and feedback loops to maintain stability under load transients, step changes, and grid disturbances. Status signals from onboard relays and sensing circuits are transmitted to the EX2000 system for real-time diagnostics, predictive maintenance, and performance logging.
WORLD OF CONTROLS maintains the largest inventory of replacement parts for GE Excitation Turbine Control systems, providing quick and reliable access to critical components when you need them. In addition to supplying high-quality parts, we offer warranty-backed unused and professionally rebuilt boards, as well as expert repairs for damaged or malfunctioning units to restore them to full operational performance. Our team of skilled engineers and technicians is available around the clock to support all your OEM and automation requirements, delivering tailored solutions and technical guidance. For pricing, availability, or assistance with parts and repairs, please contact our team by phone or email.
What is DS200FECBG1A?
The DS200FECBG1A is an Exciter Crowbar Control Board designed and manufactured by General Electric as part of the EX200 Series for GE Excitation Turbine Control systems. Its primary function is to regulate the generator�s field current by converting reference signals from the EX2000 Excitation Control System into a controlled DC excitation output.
How are analog and digital signals isolated and conditioned?
Input reference signals pass through opto-isolated interfaces to separate low-voltage control circuits from high-power excitation circuits. Precision analog filters remove high-frequency noise, while digital signal conditioning ensures accurate conversion and processing for the DACs and control loops. This guarantees both signal integrity and electrical safety.
What are the precision and tolerance levels of voltage and current sensing?
The board uses high-accuracy current and voltage sensing circuits with tolerances typically within �0.5% of full scale. These precision sensors feed the control loops, ensuring accurate excitation output and reliable voltage regulation under varying load and environmental conditions
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