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Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | GE (General Electric) |
| Part Number | DS3800NGDC |
| Product Family | DS3800 Series |
| System Platform | Speedtronic Mark IV |
| Module Type | Ground Detector Oscillator Board |
| Application | Gas turbine ground detection and protection |
| Weight | 1.25 lb (0.57 kg) radwell+1 |
| Key Components | 3 cement wire-wound resistors |
| Category | PC Board PLC/Add-On Board |
| Operating Temperature | -30 to +65 °C (typical for DS3800 cards) |
| Power Supply | +5 V DC (typical for DS3800 family) |
| Compatibility | Mark IV rack only; verify exact revision |
| Condition Options | Unused or Rebuilt |
| Availability | In stock, ships same day |
| Warranty | 1–2 years (varies by supplier) |
Product Introduction
GE DS3800NGDC is a ground detector oscillator board from the DS3800 Mark IV series, used in GE Speedtronic gas turbine control systems. It functions as a ground detector to monitor and protect turbine systems from ground faults.
The board includes three cement wire-wound resistors and is designed for ground detection and oscillation functions in the Mark IV gas turbine series. This part has been discontinued by GE and is available only as unused surplus or rebuilt units from third-party suppliers.
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| Ground fault alarm without actual fault | Ground detector board malfunction | ✅ High | Review Mark IV diagnostic logs for ground detector-related alarms | If diagnostics point to this card, replace and verify system grounding |
| No board status LEDs | No rack power, blown fuse, or bad backplane | ❌ Low | Measure rack supply voltage at the backplane and check adjacent modules | Check power and rack hardware before replacing this board |
| Intermittent ground detection faults | Loose edge connector, oxidation, or resistor failure | ✅ High | Inspect connector seating and check the 3 cement wire-wound resistors for damage | Reseat the module and inspect resistors for cracks or discoloration |
| Module not recognized | Revision mismatch or incompatible system configuration | ✅ High | Compare part number and host rack documentation | Confirm exact system compatibility before installation |
| Burn marks or overheating | Electrical damage or overload | ✅ High | Inspect PCB, connectors, resistors, and nearby components for discoloration | Replace the board and verify supply conditions before re-energizing |
If you are stuck, contact technical support with photos, rack model data, and any fault logs from the Speedtronic system.
- DS3800NGDC
Frequently Asked Questions
Q: Is DS3800NGDC still available as new from GE?
A: No, this part has been discontinued by GE. It is sold as Unused (New Surplus) or Rebuilt (Refurbished, tested) from third-party suppliers.
Q: What’s the difference between DS3800NGDC and DS3800NGDC1A1A?
A: DS3800NGDC1A1A is a more specific revision with suffix “1A1A” indicating a particular version of the ground detector module. Always match the exact part number before ordering.
Q: Can I hot-swap this ground detector board?
A: Do not hot-swap. Power down the Mark IV rack unless OEM documentation explicitly says otherwise. Swapping live can damage the backplane or the board.
Q: Will my existing configuration stay intact after replacement?
A: Speedtronic configuration usually lives in the controller or host system, not this board. Still, document the old board’s position, jumpers, and connectors before removal.
Q: Why is this cheaper than factory new stock?
A: Because it is obsolete surplus or rebuilt inventory. That lowers price, but verify test status and warranty terms. Rebuilt units should come with a test report.
Q: What condition options are available?
A: Unused (New Surplus) or Rebuilt (Refurbished, tested). Rebuilt units should be explicitly labeled and tested with verification.
Q: What should I check before ordering?
A: Confirm the full part number, Mark IV rack compatibility, connector style, and required revision. For legacy GE turbine control parts, that prevents most installation mistakes. Verify the 3 cement wire-wound resistors match your existing board for visual confirmation.
