We recently came across what appeared to be the worst power quality (as measured by voltage waveform, distortion, and regulation) we’ve ever seen (Fluke 1750 power analyzer). Power quality this poor is rather inexplicable – hard to imagine anything working well with this sort of power.
However, we’ve been analyzing power quality data for this particular client since 2003 (over 4000 individual reports) so we researched our surprisingly complete and useful database, and realized that we had reviewed this same site and same piece of equipment several years back (2009 and 2010), using an RPM 1650 power analyzer. At that time, the power quality was not only much better, it was nearly perfect. The equipment, in fact, appeared to be supplied via a UPS or power conditioner (make and model not indicated).
Since the power conditioner or UPS was dedicated to the medical imaging system, no other loads within the facility were affected. Clearly, the device feeding the equipment has failed or aged out of useful service – and needs to be bypassed (to start) and then repaired or replaced. We think you’ll agree….