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Hi first post, I'm a pretty well experienced electrician of 15 years now working solely in Agricultural electrical
We have a lot of voltage sensitive equipment on our farms which run auto ventilation and alarms ect
Today we had a huge bang from the 11kv pole transformer on one of our sites, the generator kicked in but out of 18 alarm dialers I think all 18 plus some pcbs on our ventilation panels have been fried.
When sp energy had finished it looks to me as the fault was worn insulators on the 11kv loop on top of the pole and not a transformer problem, this short on the pole happened around 1pm yet all the affected alarm pcbs faulted whilst on generator power 415v at around 2.15pm
My question is... could the loss of the 11kv loop bring in a flash of over voltage or is it possible the generator over generated and caused over voltage? On some pcbs 50ma glass fuses have survived yet the panels are dead
Thanks very much
Mike
We have a lot of voltage sensitive equipment on our farms which run auto ventilation and alarms ect
Today we had a huge bang from the 11kv pole transformer on one of our sites, the generator kicked in but out of 18 alarm dialers I think all 18 plus some pcbs on our ventilation panels have been fried.
When sp energy had finished it looks to me as the fault was worn insulators on the 11kv loop on top of the pole and not a transformer problem, this short on the pole happened around 1pm yet all the affected alarm pcbs faulted whilst on generator power 415v at around 2.15pm
My question is... could the loss of the 11kv loop bring in a flash of over voltage or is it possible the generator over generated and caused over voltage? On some pcbs 50ma glass fuses have survived yet the panels are dead
Thanks very much
Mike