Description
🔹 Product Description
The GE General Electric DS3800NOCA1B1B is an Overcurrent Overload Board from the Mark IV Speedtronic turbine control platform. The NOCA functional designation identifies the board as an overcurrent/overload card used in compatible GE gas and steam turbine control systems.
The board provides circuitry associated with monitoring and protective functions. The documented DS3800NOCA1B1B configuration includes five test points, six LED indicators, one toggle switch, one transistor, and a row of board-to-board pins for connection to the optional DS3800DOCA auxiliary board. The auxiliary board can provide additional potentiometer and quick-connect terminal functionality.
🔹 Product Datasheet
| Parameter | Value |
|---|---|
| Brand | General Electric (GE) |
| Model | DS3800NOCA1B1B |
| Series | Mark IV DS3800 / Speedtronic |
| Functional Acronym | NOCA |
| Product Name | Overcurrent Overload Board |
| Product Type | Printed Circuit Board |
| Application | Turbine Control and Protection |
| Typical System | GE Mark IV Gas and Steam Turbine Control |
| Test Points | 5, labeled TP0 through TP4 |
| LED Indicators | 6 |
| Toggle Switch | 1 |
| Transistor | 1 |
| Board-to-Board Pins | 20 |
| Auxiliary Board Compatibility | DS3800DOCA |
| PCB Connector | 28-pin female Augat connector and right-angle mating connector |
| Product Status | Legacy / Obsolete |
| Dimensions | Verify actual unit |
| Weight | Verify actual unit |
| Condition | Verify actual unit condition |
| Compatibility | GE Mark IV system configuration dependent |
The DS3800NOCA1B1B is specifically documented as a GE Mark IV DS3800 printed circuit board, while the shorter DS3800NOCA designation is identified as the Overcurrent Overload Board functional model.
🔹 Common Questions & Answers
Q: What is the GE DS3800NOCA1B1B used for?
A: It is an overcurrent/overload board used within compatible GE Mark IV Speedtronic turbine control systems.
Q: What does NOCA mean?
A: NOCA is the functional acronym associated with the DS3800NOCA Overcurrent Overload Board.
Q: How many test points does the DS3800NOCA1B1B have?
A: The documented configuration has five test points, identified as TP0 through TP4.
Q: How many LEDs are installed?
A: The DS3800NOCA1B1B is documented with six LED indicators.
Q: Can the DS3800NOCA1B1B use an auxiliary board?
A: Yes. The board can accept the optional DS3800DOCA auxiliary board through 20 board-to-board pins.
Q: What additional functions can the DS3800DOCA provide?
A: When installed, the auxiliary board provides additional potentiometers and quick-connect screw terminals for the motherboard.
Q: Is DS3800NOCA1B1B interchangeable with DS3800NOCB boards?
A: Do not assume interchangeability. Although both are associated with overcurrent functions, the complete functional designation, group/revision suffix, connectors, configuration, and system application should be matched before replacement.
Q: Is the Mark IV DS3800 series still in production?
A: The Mark IV DS3800 platform is a legacy system and is generally treated as obsolete, so replacement boards are typically sourced as new-surplus, refurbished, or other legacy spare parts.
Q: What should be checked before installation?
A: Verify the complete DS3800NOCA1B1B part number and revision, inspect connectors and components, compare the board configuration with the original card, and follow the applicable GE Mark IV maintenance procedure.
🔹 Recommended GE Models
- GE DS3800NOCB1B1B | Overcurrent Board
- GE DS3800NOTA1A1A | Over Temperature Trip Card
- GE DS3800NOWA | Regulator Card
- GE DS3800NOAA | Operational Amplifier Board
- GE DS3800NOAB | Operational Amplifier Board
- GE DS3800NOAX | Circuit Board Assembly
- GE DS3800NPAC | Power Amplifier Card
- GE DS3800NPAD | Power Amplifier Card
- GE DS3800NPCM | Circuit Board Assembly
- GE DS3800NPCR | Snubber Board
- GE DS3800NPCS | Field Excitation Snubber Board
- GE DS3800NPCT | Field Excitation Power Circuit Board
- GE DS3800NPSU | Mark IV Power Supply Board
- GE DS3800NPRB | Proximitor Interface Board
- GE DS3800NTCF | Thermocouple Conditioning Board
These models are related GE Mark IV DS3800 turbine-control boards covering overcurrent, overtemperature, regulation, amplification, excitation, power conversion, sensing, and signal-conditioning functions.
