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Re: UPS and generator interaction?

  • From: Joel Jaeggli
  • Date: Mon Mar 29 14:21:09 2004

On Mon, 29 Mar 2004, Mike Lewinski wrote:

> Brian (nanog-list) wrote:
> > Does anyone know of a way to get a UPS to trigger a generator to start, and
> > to switch over to the generator power automatically or does this type of
> > thing just not exist?  
> What Patrick said.
> But, on a minor note that probably won't affect your Symmetra but I'm 
> posting in case anyone else here can shed light on.... we had a power 
> event this AM. The transfer switch did it's magic and all was good... 
> Except for two new APC1400's- they failed once the batteries drained. I 
> triple-checked that they were on the right panel, played with 
> sensitivity, even tried daisy-chaining one off a good working 2200. 
> Nothing I did would convince the two 1400s they had power. Once the 
> house power was restored they came back to life and look normal. I later 
> learned that two of our colo customers with APC1400s had the same 
> problem :( Other models (even a couple non-essential lower-end, dumb APC 
> 450s and 650s) didn't blink at the generator power.

It's possible that the generatar is running to fast or slow and the 
frequency is out of range for the ups... I had this happen in Ghana, 
generator was producing 47.5hz, opened the throttle and everything was 
> Mike

Joel Jaeggli  	       Unix Consulting    
GPG Key Fingerprint:     5C6E 0104 BAF0 40B0 5BD3 C38B F000 35AB B67F 56B2

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