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The GE IS200HFPAG2ADC is a High-Frequency AC/Fan Power Supply Board (HFPA) designed for the General Electric Mark VI Speedtronic Turbine Control System.1
Its primary role is to ensure the thermal and electrical integrity of the control system by converting high-voltage input into regulated, low-voltage power for essential auxiliary components, mainly the cooling fans.
⚙️ Core Functions and Technical Details
The IS200HFPAG2ADC is part of the G2 revision of the HFPA series, with the $\text{ADC}$ suffix indicating a specific manufacturing or functional revision.
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System: Integrated into the GE Mark VI Speedtronic Turbine Control systems, which manage gas and steam turbines.2
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Role: Acts as a power supply and regulator, converting AC or DC input into required low-voltage outputs.3
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Input Power: Accepts a wide range of high-voltage AC or DC input (e.g., 230 VAC or 230–1000 VDC).4 Input is typically connected via four stab-on connectors.5
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Key Outputs: The board produces low-voltage, high-frequency square wave outputs for system use:6
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52 VDC and 52 VAC (Squarewave) for powering cooling fans.
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19.1 VAC (Squarewave) for supplying isolated power to other control circuitry.
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Maximum Load: The total power output load is typically limited to 90 VA (Volt-Amperes).7
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Protection: It includes four fuses and a Metal Oxide Varistor (MOV) to protect the circuit from electrical surges and overcurrent.8
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Diagnostics: Features two LED indicators (DS1 and DS2) to visually confirm the status of the key output voltages (specifically the 19.1 VAC and 52 V AC/DC outputs), aiding in troubleshooting.9
This board is vital because it manages the cooling of the sensitive I/O and processor electronics, and provides stable, isolated power that is necessary for the continuous, reliable operation of the turbine control system.
