[j-nsp] EX8200 power supplies taking down an entire 208v circuit

[Brent Jones]

On Tue, Mar 13, 2012 at 11:39 PM, Morgan McLean <wrx230 at gmail.com> wrote:

> Hi everyone...
>
> I have a troubling problem. We run a couple EX8208's, and have a mix of
> 1200, 2000 and 3000w PSU's in use. So far within the past ~60 days, we have
> had 2 out of a total of 12 PSU's running have a failure. Unfortunately,
> thats not the problem.
>
> The problem is, when these PSUs die, they're taking out our entire circuit.
> A 20A 208v circuit, completely popped. Is this normal behavior when a PSU
> dies? We've had plenty of other units' PSUs go bad, and never experienced
> something like this. Its been different circuits in our two network cabs,
> and both weren't very loaded up last we checked before they popped. Usually
> just a couple amps worth.
>
> Any ideas?
>
> Thanks,
> Morgan
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Certainly strange, I'd probably look at the breakers or fuses on the
cabinet distribution first.
I've seen different types of breakers have different reaction time to
sudden loads.
Could also be an upstream problem causing the EX's power supplies to fail.

-- 
Brent Jones
brent at brentrjones.com