Some industries require their suppliers of electrical equipment to demonstrate that it has voltage sag withstand capability in accordance with published Standards e.g. SEMI F47, IEC61000-4-34, IEE1668. In order to evaluate voltage sag withstand capability it is necessary to have a means of creating voltage sags of predetermined variable depth (e.g.70% ), variable duration and the means of recording results of such tests.
"The results were dramatic. Productivity losses from sags with the protected saws were reduced to zero. I can say with absolute confidence the payback was well under a year. Now my only problem is that production managers want to know why we didn’t protect the rest of the wire saws with the AVC. Every time a thunderstorm appears in our area, we have to shut down the unprotected saws until the storm passes.”
Silicon Wafer Production - Plant Engineer
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