Riccardo Facchetti Issue #80, December 2000 Riccardo delves into the details of apcupsd, a program for monitoring and controlling APC UPSes. Computers, like any other kind of electronic device, are very sensitive to utility power quality. According to American Power Conversion definitions (see Table 1) power anomalies can be classified as sags (better known as brownouts), blackouts, spikes, surges and ...
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