Hi All,
I have a problem in my project wrt power protection and sincerely hope
for advices from you folks. Please bear with me on the background
story and pardon any novice questions. I don't have electrical
background but due to shortage of resources have been honorably
mandated to troubleshoot (sigh).
We are building a metering system for an oil & gas facility. The
system consists of a few field transmitters and a gas chromatograph
(GC) unit. They get their power supply through the control panel in
the control room. Power supply for the system comes from a diesel
genset via UPS.
During commissioning, we encountered problem with GC 2x. First, the
power supply unit got damaged. Second, the terminal board got burned
at the fuse section. No one was sure the cause of the 1st damage, but
the 2nd damage happened when a switching to battery occured at UPS. We
found a few things: 1) the panel wasn't connected to grounding bar.
This has been quickly resolved. 2) power frequency dropped a bit
during UPS switching.
We are still concerned that something similar may happen in the
future. GC is a sensitive unit and the spare parts are pricey as well,
so we want to prepare the best we can to prevent similar problems.
I got recommendation to add surge arrester between UPS and control
panel. Would that be enough? Is there any other area that I need to
check? Any pointer/advice (general/specific) would be much
appreciated..
I understand there may be much more info required to understand the
situation. For now I will hold them back to avoid information
overcurrent. Feel free to ask and I'll let you know as best as I can.
Thank you folks!
Rgds,
Eddy
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