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  • Users: pqguy
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  1. pqguy

    Low Frequency Filter for Security Systems

    I have a new installation with 480V, 225kva UPS feeding (2) 225kva isolation xfmrs (in series) then (5) 225A 208/120V panelboards. The panels deliver power to 800 security cameras, power supplies & monitors. We are experiencing screen shake & horizontal hold/ghosting. It appears that cameras...

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