Onsite high voltage test for 420MVA
Onsite high voltage test for 420MVA
(OP)
Hello Everyone,
We had just finalized onsite repair for 420MVA/18/220kV.The high voltage exit leads had been replaced due to poor crimping.
Part of the repair scope is to conduct high voltage test by the repair company.
What is the best practice in this case, should we hire third party to witness the test and judge/interpret the test results.should the repair company provide test procedure and acceptance criteria.
Appreciate your advice.
We had just finalized onsite repair for 420MVA/18/220kV.The high voltage exit leads had been replaced due to poor crimping.
Part of the repair scope is to conduct high voltage test by the repair company.
What is the best practice in this case, should we hire third party to witness the test and judge/interpret the test results.should the repair company provide test procedure and acceptance criteria.
Appreciate your advice.






RE: Onsite high voltage test for 420MVA
Muthu
www.edison.co.in
RE: Onsite high voltage test for 420MVA
I guess you need third-party verification if you don't have sufficient expertise in-house to be certain that the tests are being performed correctly, or if you have a suspicion that the repair company is trying to take short-cuts.
On a transformer of that size - a generator transformer by any chance? - the companies with the required skills to undertake the repair are fairly limited in number and all have a reputation to protect, at least in this patch of the world.
RE: Onsite high voltage test for 420MVA
"the companies with the required skills to undertake the repair are fairly limited in number and all have a reputation to protect".
That's why I don't see them cutting corners, especially if they carry the warranty.
Muthu
www.edison.co.in
RE: Onsite high voltage test for 420MVA
RE: Onsite high voltage test for 420MVA
RE: Onsite high voltage test for 420MVA
RE: Onsite high voltage test for 420MVA
A spot of dirty grease left behind from a tool can cause a flash-over in the transformer oil.
Bill
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"Why not the best?"
Jimmy Carter