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  • Users: ODCaveman
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  1. ODCaveman

    Control transformer hookup question.

    I have a Hammond HPS Fortress 500va controls transformer in a control panel I built for a hydro-pneumatic pump control system. The incoming power is 3 phase 220V and I wanted 120V power for the controls circuitry. My secondary voltage is hovering around 129V under the minimal load of the...

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