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DS3820PSCC - Power Supply Assembly Module (80-140 VDC) is available in stock which ships the same day.
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SPECIFICATIONS:
Part Number: DS3820PSCC
Manufacturer: General Electric
Series: Mark IV
Module Type: Power Supply Assembly Module
Input Voltage Range: 80 to 140 VDC
Nominal Input Voltage: 125 VDC
Output Voltage: +28 VDC
Operating Temperature: -20°C to +70°C
Size: 8.25 cm high x 4.18 cm
Repair: 3-7 days
Availability: In Stock
Weight: 2 lbs
Country of Origin: United States
FUNCTIONAL DESCRIPTION:
DS3820PSCC is a Power Supply Assembly Module (80-140 VDC) manufactured and designed by General Electric as part of the Mark IV Series used in GE Speedtronic Gas Turbine Control Systems. The Power Supply Assembly Module (80–140 VDC), commonly designated as DS3820PSCC, is an integral component of the GE Speedtronic Mark IV gas turbine control system, designed to convert an unregulated 80–140 VDC input into a stable, regulated +28 VDC output. This output voltage is distributed across multiple control boards, including processor sections, I/O modules, protection logic circuits, and trip solenoid drivers. Internally, the module contains DS3800-series regulation and filtering boards configured for high-reliability DC-DC conversion, transient suppression, and electromagnetic noise filtering. The design ensures tight voltage regulation with low output ripple and rapid transient recovery to support deterministic operation of turbine safety and control logic. Protection features such as input fusing, overvoltage clamps, and EMI filters enhance system resilience during power disturbances, brownouts, or switching surges.
INSTALLATION:
The module is secured using precision-aligned mounting flanges and fasteners to ensure vibration-resistant placement. Electrical interface is achieved through keyed edge connectors or terminal lugs that connect the unit to the control system’s 125 VDC station battery bus or equivalent power source. All wiring must conform to GE’s system grounding and segregation standards, with the module chassis bonded to the system ground to minimize EMI and establish a stable electrical reference. Before installation, the system must be fully de-energized and verified safe using lockout-tagout (LOTO) procedures. Post-mounting, all connector engagements should be checked for proper seating, torque specifications should be verified on terminal connections, and insulation integrity confirmed to prevent arcing or ground faults during operation.
OPERATIONS:
The input is first routed through internal EMI/RFI filters and surge protection networks to suppress electrical noise and voltage transients. The conditioned voltage is then processed by high-efficiency DC regulation circuitry to generate a stable and low-ripple +28 VDC output. This regulated power is distributed to essential control system boards, including processor modules (R, S, T), I/O interface cards, sequencing logic, and trip protection circuits. The power supply is designed for full-load continuous operation under varying environmental and load conditions, with regulation precision critical to maintaining the integrity of sensitive analog signal processing and deterministic digital logic.
WOC maintains the largest inventory of Replacement parts for GE Speedtronic Gas Turbine Control Systems. Additionally, we offer warranty-backed unused and rebuilt boards as well as board repairs for your damaged ones. For your OEM needs, our team of professionals is available around the clock. We at WOC are happy to help you with any needs you may have in terms of automation. Please contact our team by phone or email for pricing and availability on any components and repairs.
What input voltage does the power supply accept?
The module is designed to operate with a DC input voltage range of 80 to 140 VDC, with 125 VDC being the nominal voltage typically supplied by the turbine’s station battery system or DC power bus. This wide input range accommodates fluctuations in battery charge or supply variations common in industrial environments.
What is the regulated output voltage?
It provides a stable and regulated +28 VDC output, which powers essential turbine control electronics, including processor cards, I/O modules, and protective relay circuits. The output voltage is tightly controlled to prevent voltage drift that could affect sensitive instrumentation.
What happens if the input voltage falls below 80 VDC?
If the input voltage drops below the minimum operating threshold of approximately 80 VDC, the power supply output can become unstable or shut down entirely. This loss of regulated power may trigger alarms or faults within the turbine control logic, potentially causing a system trip or shutdown.
