Description

342A4922P28V500DH DC‑DC Power Supply Module

Technical Specifications

• Part Number: 342A4922P28V500DH
• Brand: GE Vernova (Mark VIe Speedtronic series)
• Warranty: One Year
• Input Voltage: 70‑145 VDC wide‑range DC input; typical from plant battery‑rectifier system
• Output: 28 VDC, 500 W continuous power; max output current 17.9 A
• Efficiency: Typical 90 %; convection cooling, fan‑less design
• Operating Temperature: ‑40 °C ~ +70 °C cabinet‑mount; ATEX Zone2 / Class I Div2 certified cabinet installation
• Storage Temperature: ‑40 °C ~ +85 °C
• Isolation: 1500 VDC galvanic isolation between input and output sides
• Protection: Over‑voltage, over‑current, short‑circuit, thermal shutdown; hardware fault‑indicator LED; resettable internal protection
• Mounting: DIN‑rail TS35 or panel screw mounting; metal enclosure with cooling fins
• Dimensions: 200 mm × 100 mm × 50 mm; weight approx 2.1 kg
• Interface: Screw‑clamp terminal blocks for high‑voltage DC input and 28 VDC control‑system output; power‑status LED indicators

Product Overview

The 342A4922P28V500DH is a high‑power DC‑DC power supply unit for GE Mark VIe distributed turbine‑generator control systems. It converts wide‑range 70‑145 VDC plant battery‑bus voltage into regulated 28 VDC to power UCS controllers, IONet I/O packs, Ethernet switches and other Mark VIe cabinet electronics. Fan‑less construction improves reliability for power‑plant cabinet environments. It can be deployed in redundant parallel configuration to achieve high‑availability for critical turbine control systems.

This power‑supply addresses turbine‑control challenges: wide‑input tolerance for fluctuating plant DC battery‑bus, high‑power capacity for multi‑node distributed IONet systems, and drop‑in spare‑part compatibility for legacy Mark VIe maintenance‑retrofit projects. Turbomachinery‑control engineers, power‑plant maintenance technicians and retrofit integrators benefit most. It applies for gas‑turbine, steam‑turbine, combined‑cycle and balance‑of‑plant control cabinets in utility and petrochemical power‑plants.

Key Application Notes

• Dedicated Mark VIe cabinet power supply; cannot operate standalone, feeds 28 VDC to UCS‑controller, PDIO‑, PHRA‑, PTUR‑series I/O packs and IONet switches
• Supports parallel redundant operation; external diode‑OR circuit required for true N+1 redundant power architecture
• Not hot‑swap capable: input high‑voltage DC must be fully isolated before module replacement
• Install only inside safe‑area / Zone2 cabinet; not for direct field hazardous‑area mounting
• Conformal‑coated variant available for high‑humidity, high‑contaminant cabinet environments
• Derate output power under high‑ambient‑temperature operation; maintain clearance around cooling fins
• Origin: USA; widely‑used spare for Mark VIe turbine‑generator maintenance‑retrofit projects