UPS and generator interaction?

Tue Mar 30 21:47:58 UTC 2004

On Tue, 30 Mar 2004, David Lesher wrote:

> Side thought, but not a NANOG topic. What in your data center
> really cares if your generator puts out 57 or 63 Hz, not 60.0?
> Why?

Some UPSes such as the Best FerrUPS series and other voltage regulators
and line conditioners that use a ferro-resonant transformer where there's
an L-C tuned circuit as part of the power transformer.

Other motor loads may care to some extent.  Analog electric clocks will
run slow or fast, no big deal.  Lower freqencies are harder on marginally
designed transformers which may not have enough core material.

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