Hi Heather,
Others have already chimed in so there's not much that I can add. 30A
is the maximum current the UPS can supply, not the current it ALWAYS supplies.
And the nanobay console should have a 20A circuit breaker so that if the current
draw does go too high it will trip the breaker--hopefully protecting the rest of
the system from damage. I've harassed our electricians about this a few times
and I believe that as long as there's a 20A breaker protecting the circuit it's
up to code and should be safe.
I'm not sure which UPS you bought but if you've got one of the GXT5 series, one
possible solution would be to exchange the power distribution box on the back
for a 20A unit. And then you'd have to swap back to the20A plug...
Cheers,Mike
On Tuesday, July 1, 2025 at 04:22:07 PM MDT, Heather Schenck via groups.io wrote:
We had our University electricians in today connecting our 2010 vintage AvIII
Nanobay instrument to the house backup generator in case of longer power outages.
They also assembled the new Liebert UPS unit that we purchased for the system
recently.
When they reached the point of connecting the new UPS to the Avance console, they
found the UPS was set up to deliver 30 amp service while the console plug was 20 amp.
The way they resolved this (I had to leave for a medical appointment and was unable
to weigh in on this choice) was to replace the console's 20 amp plug with a 30 amp
plug to match the UPS outlet.
I have not powered up the instrument out of fear that 30 amps may fry some components
of our system, which is past its lifetime for maintenance support. We cannot afford
to replace the console if components fail.
I am sending this inquiry on a parallel path with an inquiry to Bruker. I have no
electrical competencies. Can anyone tell me whether a system designed to run on
20 amps can be safely run on 30 amp service, or do I need to have electricians
back in to cut the plug (and UPS) down to 20 amp service?
Thanks for any reflections folks care to share.
Heather
Schenckhschenck_at_uwlax.edu
608 785 8288
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Received on Wed Jul 02 2025 - 07:18:13 MST