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The GE DS200FCRRG1A DS200FCRRG1AKD firing circuit board generates precise gate pulses for thyristor firing. This board controls the timing and amplitude of gate drive signals. You will find this firing board in GE Mark V drive systems. Its precision timing ensures accurate thyristor conduction angles.
Firing Circuit Architecture
This firing board uses a dedicated FPGA for pulse timing generation. Consequently, it achieves microsecond-level precision for thyristor firing. The GE DS200FCRRG1A DS200FCRRG1AKD generates twelve independent gate pulse channels. Moreover, six status LEDs provide real-time operational feedback. You can monitor each thyristor’s firing status directly from the board.
Technical Specifications
| Parameter | Value |
|---|---|
| Gate Pulse Output | 12 channels, 24V/2A per channel |
| Pulse Width | 50-200 µS (software configurable) |
| Input Logic Level | 5V DC (from controller) |
| Output Voltage | 24V DC nominal for gate drive |
| Pulse Rise Time | <500 ns |
| Dimensions | 240mm x 180mm x 35mm |
| Weight | 0.78 kg (1.72 lbs) |
| PCB Layers | 8 |
| Onboard Components | 1 FPGA, 12 pulse transformers, 24 transistors, 4 timing capacitors |
| Connector Count | 4 (logic input, gate output, fault feedback, power) |
| Status Indicators | 6 LEDs (gate active, fault, ready, sync, power, comm) |
| Energy Storage | 4700 µF (gate drive power supply) |
| Isolation Voltage | 2500V (input to output) |
| Maximum Switching Frequency | 5 kHz |
| Operating Temperature | -10°C to +55°C |
| Storage Temperature | -25°C to +70°C |
Precision Timing and Isolation
The unit includes a dedicated FPGA for microsecond-level timing control. Therefore, it ensures accurate synchronization with AC line zero-crossings. This board replaces the DS200FCRRG1AKD version without any logic changes. Simply remove the old board and install this one. GE designed this firing board for high-reliability applications. Hence, it meets stringent drive system requirements.
Eight PCB layers separate low-voltage logic from high-voltage gate traces. Four connectors handle all input, output, and feedback signals. The GE DS200FCRRG1A DS200FCRRG1AKD holds 4700 µF of energy storage capacitance. Accordingly, it delivers consistent gate pulses during line voltage sags. Six status LEDs provide complete operational feedback.
Fault Monitoring and Installation Guide
Each channel includes a fault detection circuit for shorted gates. The board reports open or shorted conditions to the main controller. The GE DS200FCRRG1A DS200FCRRG1AKD requires a clean 24V DC power supply. Always use high-voltage rated cables for gate output connections. Keep gate leads shorter than 2 meters for reliable operation.
Proper heatsinking around the output transistors ensures long life. The board includes thermal protection that shuts down at 85°C. The GE DS200FCRRG1A DS200FCRRG1AKD works with all GE Mark V drive systems. Installation requires only a screwdriver for power and signal connections. This board operates in non-condensing environments with adequate airflow.