Ed Gould wrote:
[...]
its been an interesting discussion. Thanks all for contributing. One
question remains in my mind though what is the allowable time power
maybe interrupted to a CPU ? 1 NS (nanosecond) ? or 0 NS? or ? As I said
in my original piece I am not familiar with UPS's and could some one
come up with a current answer? If the answer is it depends that would be
nice to know that, as well. Thanks.
I can be wrong here, but I believe it is matter of voltage cycles, more
precisely rather half of the cycle. I mean cycle of "sinus-voltage" (I
don't know the term in English). It is about 10ms for Europe (50Hz) and
8,(3) for US (60Hz).
Caution: YMMV. The time of outage *strongly depends* on several factors:
- power supply type. When big capacitors are used, then the time tneds
to be longer. The same for large trasformers. but those in use are so large.
- the type of "interruption". It can be "plain" blackout, or surge,
pike, etc.
- current power compsumption. Oversized PS should tend to "work" longer.
- sensibility of the device. Some devices fail to work in case of small
voltage drop, others are not so sensible.
--
Radoslaw Skorupka
Lodz, Poland
--
BRE Bank SA
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podwyszenia kapitau zakadowego, na podstawie uchwa XVI WZ z dnia 21.05.2003
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