GE DS3800NB1A Speedtronic Mark IV Power Regulator Board

Product Description

The DS3800NB1A is a power regulation and distribution board for GE Speedtronic Mark IV turbine control rack. It converts raw cabinet input power into stabilized +5V, +15V and -15V DC power for the processor, memory and I/O cards in the same chassis, including DS3815PAHB1A1A processor interface board. It provides filtering, overvoltage and overcurrent protection, and feeds clean power to the backplane bus. It is a critical power component for Frame 5, Frame 6, Frame 7 gas turbine and steam turbine control cabinets.

Features

• Part No: DS3800NB1A, belongs to GE Speedtronic Mark IV platform
• Input: 125VDC station battery or 115/230VAC cabinet supply
• Output: regulated +5V, +15V, -15V DC for logic boards
• Overvoltage, overcurrent and short-circuit protection circuit
• Onboard LEDs for power rail status and fault indication
• Conformal coating for anti-humidity and anti-corrosion in power plant cabinet
• Standard Eurocard plug-in design for Mark IV rack
• Built-in test points for voltage measurement and troubleshooting
• Supports redundant power configuration for turbine safety control

Applications

• Frame 5 / Frame 6 / Frame 7 gas turbine control cabinet
• Steam turbine governor and protection control rack
• Power plant legacy Mark IV system maintenance and spare replacement
• Oil & gas mechanical drive turbine control retrofit
• Power supply for DS3815PAHB1A1A and other Mark IV processor boards

FAQ

Q: Which board is DS3800NB1A commonly paired with?
A: It is the dedicated power regulator for DS3815PAHB1A1A processor interface board.

Q: Is DS3800NB1A hot-swappable?
A: It depends on rack redundant design; single power rail configuration requires turbine shutdown before replacement.

Q: Is this board still in production?
A: Yes, Speedtronic Mark IV series is end-of-life, only available as surplus and refurbished tested spare parts.

Q: What is the difference between DS3800NB1A and DS3800NPSE1B1A?
A: DS3800NB1A is power regulator board; DS3800NPSE1B1A is another Mark IV power supply variant with different power rating.