Power issues with UPS's

computaur · Apr 8, 2013

Hey all,

I'm the SCADA Support Analyst for a city ran utility plant. I'm having some issues with the power running through the building currently( I'm getting readings of 107-180k Hz instead of the standard 60k Hz that it should be) This is obviously the 'big picture' problem but for the time being I'm considering implementing more industrial equipment for a quick fix to prevent things from burning up.

So my question is do they make UPS's that are designed to regulate high electrical flow? I've been researching some but I know a lot of professionals browse these forums so wanted to maybe cross refrence a more educated person than I in the matter.

Thank you,

RetiredChief · Apr 8, 2013

First I was going to ask, what country, Probably US as we use 60 Hz, England and most of EU use 50 Hz. - But on second thought, what planet - 60 KHz. Hoping your reference to K HZ is a misprint.

The first thing have you validated test equipment used to measure the Frequency. In the US Frequency is much better regulated than Amplitude? Next question are you looking at a harmonic, or a noise level riding the main AC input.

If this is a signal riding the Main 60Hz AC input, you could build a pi-type (or LC) impedance network (Band-pass filter) that only allowed 50->70 Hz to pass and to reject signals above and below- but would need to know the power contained in above 70 Hz noise.

Probably could not apply this to a transformer as the freq above say 120 Hz the winding would start to appear as a short.

If the Main AC is in fact at 107-180 Hz you will need to first rectify to DC, then using an xstal controlled oscillator to control a push-pull amp (Class B) to an xformer. -Nutshell of what would be needed. - Simple UPS would not handle the deviation in Frequency, they are amplitude devices.

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Power issues with UPS's

computaur

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RetiredChief

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