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The GE IS200HFPAG1ACB High Frequency/AC/Fan Power Supply Board is a printed circuit board designed by General Electric, primarily for use within the GE Mark VI Speedtronic turbine control system.1
It functions as a High Frequency Power Supply module, often referred to by the acronym HFPA.2
⚙️ Key Function and Specifications
The main role of the IS200HFPAG1ACB board is to convert and regulate incoming AC or DC power into the necessary outputs for various components, typically for high-frequency AC-powered devices and fans within the turbine control cabinet.3
Key specifications for the base model, IS200HFPAG1A (of which the G1ACB is a variant), include:
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Series: GE Mark VI Speedtronic4
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Function: High Frequency AC/Fan Power Supply5
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Supply Input: 6$230-1100\text{VDC}$ or 7$230\text{VAC}$
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AC Output: 8$48\text{VAC}$ (Square Wave, 9$25\text{kHz}$) and 10$17.7\text{VAC}$
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DC Output: 11$48\text{VDC}$
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Max Output Loading: 12$90\text{VA}$
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Protection: Includes four fuses and a metal oxide varistor to protect the circuitry.13
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Visual Status: Features two LEDs to indicate the status of the voltage outputs.14
The board is typically mounted near a board rack or a fan enclosure within the Mark VI drive cabinets.15
💡 Importance in Turbine Control
In a large-scale industrial application like a gas or steam turbine control system (such as the Mark VI), a board like the IS200HFPAG1ACB is critical because it ensures a stable and reliable power source for components that require high-frequency or specific AC/DC voltages, particularly for cooling fans and other specialized equipment essential for the system’s operational integrity.
The video below explains how to diagnose a common failure in a GE control board related to fan motors, which is relevant to the “Fan Power Supply” function of the board.
