Description
DS3800NPSE1B1A: Product Overview
The DS3800NPSE1B1A is the primary DC power-supply board for GE Speedtronic Mark IV gas- and steam-turbine control racks. Occupying one 6BA05 slot, it converts 125 V DC or 24 V DC plant power into stable, filtered +5 V logic, ±15 V analog, and +24 V relay rails that feed CPUs, I/O, servos, and contactors. The card is hot-swappable in triple-redundant configurations and reports power-good, over-current, and thermal status to the system watchdog.
Physical implementation includes switch-mode power conversion, EMI filtering, in-rush limiting, and 1500 V AC galvanic isolation between input and output. Front-edge LEDs (green = all rails OK, red = fault) give at-a-glance health; remote sense pins compensate for voltage drop on long back-plane runs. Conformal coat and gold-plated edge fingers inhibit salt-fog or SO₂ corrosion in coastal or refinery sites.
Environmental qualification meets IEEE 344 Class 1 (seismic) and –40 °C to +85 °C operation, permitting mounting directly on the turbine deck with no extra HVAC. MTBF is >300 000 h at 55 °C, giving >25-year service life in baseload duty.
GE DS3800HRDA1C1B
DS3800NPSE1B1A: Technical Specifications
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Model Number: DS3800NPSE1B1A
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Manufacturer: General Electric (GE Energy)
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Product Type: Power Supply Board
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System Compatibility: Speedtronic Mark IV (6BA05 slot)
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Input Voltage: 125 V DC (standard) or 24 V DC (jumper-selected)
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Output Rails: +5 V @ 6 A, ±15 V @ 1 A, +24 V @ 2 A (relay)
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Regulation: ±1 % line/load, <50 mV ripple, <100 µs recovery
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Protection: Over-current, over-temperature, input surge, power-good
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Isolation: 1500 V AC input-to-output, 500 V output-to-ground
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Backplane: Dual 96-pin VME, gold-plated edge fingers
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Indicators: Green = all rails OK, Red = fault / thermal limit
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Temp Range: -40 °C to +85 °C operational, -55 °C to +125 °C storage
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Vibration / Shock: 15 g continuous, 30 g shock (IEEE 344)
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Certifications: SIL2 (IEC 61508), API 670, CE industrial emissions
Core Features & Customer Value
Triple-Rail Integration Cuts Spares Inventory
One card delivers logic, analog, and relay power—eliminates separate 5 V, ±15 V, and 24 V supplies, reducing spare count by 60 % and cable clutter by 40 %.
One card delivers logic, analog, and relay power—eliminates separate 5 V, ±15 V, and 24 V supplies, reducing spare count by 60 % and cable clutter by 40 %.
Hot-Swap Redundancy Without Outage
Plug-and-play replacement in TMR racks; remaining two supplies carry load while faulted board is swapped in <5 min, achieving >99.97 % start reliability on combined-cycle fleets.
Plug-and-play replacement in TMR racks; remaining two supplies carry load while faulted board is swapped in <5 min, achieving >99.97 % start reliability on combined-cycle fleets.
Field-Selectable Input Voltage
Jumper chooses 125 V DC (typical US utilities) or 24 V DC (European battery plants); no hardware change required, protecting investment during plant upgrades or international relocations.
Jumper chooses 125 V DC (typical US utilities) or 24 V DC (European battery plants); no hardware change required, protecting investment during plant upgrades or international relocations.
Seismic & Harsh-Site Qualified
IEEE 344 Class 1 and -40 °C rating allow mounting on turbine deck with no HVAC; conformal coat and gold-edge connectors resist salt-fog, SO₂, and coal-dust, delivering >25-year life.
IEEE 344 Class 1 and -40 °C rating allow mounting on turbine deck with no HVAC; conformal coat and gold-edge connectors resist salt-fog, SO₂, and coal-dust, delivering >25-year life.
GE DS3800HRDA1C1B
Typical Applications
Gas Turbine Control Rack Power
Primary supply for Frame 7/9 Mark IV racks: feeds CPU, I/O, servo amplifiers, and contactors during start-up, load ramps, and emergency trips. Power-good interrupt triggers controlled shutdown if any rail droops.
Primary supply for Frame 7/9 Mark IV racks: feeds CPU, I/O, servo amplifiers, and contactors during start-up, load ramps, and emergency trips. Power-good interrupt triggers controlled shutdown if any rail droops.
Steam Turbine Governor & Protection Power
Powers 3500/42M vibration monitors, servo cards, and trip solenoids in steam turbine Mark IV retrofits. Deterministic power-good logic ensures trip solenoids remain energised until safe shutdown is confirmed.
Powers 3500/42M vibration monitors, servo cards, and trip solenoids in steam turbine Mark IV retrofits. Deterministic power-good logic ensures trip solenoids remain energised until safe shutdown is confirmed.
Black-Start & Emergency Battery Power
Operates from 125 V DC station battery during grid loss, maintaining control electronics without external AC. Low-battery cut-out protects battery from deep discharge, extending battery life by >30 %.
Operates from 125 V DC station battery during grid loss, maintaining control electronics without external AC. Low-battery cut-out protects battery from deep discharge, extending battery life by >30 %.
