Field Excitation for EX2000 Generator Systems
The GE DS200EXDEG1A DS200EXDEG1AEA manages field excitation control for EX2000 generators. This board regulates the generator field current for stable voltage output. It coordinates with the main AVR for complete excitation system control.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | DS200EXDEG1A DS200EXDEG1AEA |
| Category | Excitation Control Board |
| Height | 250 mm |
| Width | 180 mm |
| Depth | 30 mm |
| Weight | 0.720 kg |
| Processor | 16-bit at 20 MHz |
| Program Memory | 128 KB flash |
| Data Memory | 32 KB RAM |
| Gate Drive Outputs | 6 x fiber optic (SCR firing) |
| Analog Inputs | 4 x differential (±10 V or 4-20 mA) |
| Analog Outputs | 2 x ±10 V |
| Digital Inputs | 6 x 24 V DC |
| Digital Outputs | 4 x relay (2 A at 250 V AC) |
| Field Current Feedback | 1 x 4-20 mA (isolated) |
| Field Voltage Feedback | 1 x 0-600 V DC (isolated) |
| Communication Ports | 1 x RS-232, 1 x RS-485 |
| Connector Type | 4 x 20-pin headers, 2 x fiber optic ports |
| Status Indicators | 6 x LEDs (PWR, RUN, FLT, FIELD, AVR, COM) |
| Internal Components | 1 CPU, 1 FPGA, 6 gate drivers, 1 battery, 3 transformers |
| Energy Storage | 2400 mAh lithium battery (parameter backup) |
Excitation Architecture and Control Functions
The GE DS200EXDEG1A DS200EXDEG1AEA uses a 16-bit processor at 20 MHz. This processor executes excitation control algorithms for field regulation. An FPGA handles real-time SCR firing pulse generation. The board stores firmware in 128 KB of flash memory. It keeps runtime data in 32 KB of battery-backed RAM. The GE DS200EXDEG1A DS200EXDEG1AEA generates six fiber optic gate drive signals for SCRs.
Feedback Processing and Field Measurement
This excitation control board accepts field current feedback from a 4-20 mA loop. A separate input measures field voltage up to 600 V DC. Both feedback channels provide isolation for operator safety. The DS200EXDEG1A DS200EXDEG1AEA also includes four general-purpose analog inputs. Two analog outputs provide ±10 V for external monitoring. Six digital inputs accept 24 V DC signals from protection relays.
Protection Features and AVR Integration
The GE DS200EXDEG1A DS200EXDEG1AEA includes comprehensive field protection functions. It monitors for overexcitation, underexcitation, and field loss conditions. The board communicates with the main AVR for coordinated control. Four relay outputs trip external protection devices when needed. Six status LEDs show power, running, fault, field, AVR, and communication status. The red FLT LED indicates any excitation system fault.
Physical Dimensions and Installation Guidelines
The GE DS200EXDEG1A DS200EXDEG1AEA weighs 0.720 kilograms for secure mounting. Its height measures 250mm, width 180mm, and depth 30mm. Install this board in the excitation section of EX2000 generator panels. The board consumes 9 watts from the internal power supply. It operates reliably from 0°C to +50°C ambient temperature. Use proper ESD handling procedures during installation.
Energy Storage and Battery Maintenance
The DS200EXDEG1A DS200EXDEG1AEA uses a 2400 mAh lithium battery for parameter backup. This battery retains excitation tuning constants and protection settings. The battery lasts approximately five years under normal conditions. Replace the battery when the low battery LED indicator lights up. Always replace the battery with the GE DS200EXDEG1A DS200EXDEG1AEA powered on. The board loses no parameters during battery replacement with power applied.
Details
| Weight | 0.91 kg |
|---|---|
| Dimensions | 273.6 × 214.1 × 59.2 mm |
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