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The original was posted on /r/electricians by /u/NotFallacyBuffet on 2024-01-23 09:23:41+00:00.
Had a transformer fire across the road which glitched power a few times in a stand-alone emergency department. The ED’s generator came on and won’t go off. (Different building and different utility transformer than my building. But it glitched my building’s power a bunch of times.)
I’ve isolated the problem to a Cummins ATS that is reading normal source voltages incorrectly on L2. Assuming that is why it’s not switching back to normal. I.e., the digital display shows a low voltage on L2, but metering shows that the voltages are just fine.)
The MDP feeding normal power to this ATS has an I-Line Smart Cell. First time I’ve encountered one. Googling brings up the Schneider site that says it’s a network communication device that will log and report power-logger type data.
What I’m asking about are the three little yellow lights over on the right-hand side by the handle that looks like a small breaker handle.
Am I correct in assuming all the above and, also assuming that the handle is the disconnect for this little electronic device and that the yellow light indicates a burned-out fuse? The yellow light is on L2, just like the ATS problem.
(I originally assumed that the Smart Cell was a surge protective device, but now I don’t think so.)