Two of the Uninterruptable Power Supplies powering our servers notified me that the power coming into the building was wavering around 126 volts instead of the normal 120. (I'm used to Ontario where 110 is normal.)
The last time this happened we had a bad ground wire for the entire building. This time it turned out to be a copper theft down the street.
Even though one of the UPSs is useless as a UPS (Get a UPS that outputs a true sine wave, NOT a "stepped approximation" as most cheap ones do), it's still wonderful for monitoring our power.
UPS
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Ulysses
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Re: UPS
Well, I used to work with servers full time back in the day. In one company we had all Compaq rack mount servers, and the UPS unit(s) for them could also fit into a rack. Except for the main IT department computer center, which had its own hefty power supply system sitting on a big concrete pad outside the building.rstrong wrote: ↑Thu Mar 28, 2013 3:56 pmTwo of the Uninterruptable Power Supplies powering our servers notified me that the power coming into the building was wavering around 126 volts instead of the normal 120. (I'm used to Ontario where 110 is normal.)
The last time this happened we had a bad ground wire for the entire building. This time it turned out to be a copper theft down the street.
Even though one of the UPSs is useless as a UPS (Get a UPS that outputs a true sine wave, NOT a "stepped approximation" as most cheap ones do), it's still wonderful for monitoring our power.
Here at home I have a much smaller Cyberpower unit which seems to work fine. The power here, however, is generally very stable. It rarely goes out. The place I lived about 25 years ago, not so much. And I ran a computer/network/consulting business from there, to boot.
As I recall most end user scale computer systems are relatively tolerant of strange waves. I suspect the quality of the output of such UPS modules has improved significantly over the past few decades.
