BDV of Transformer Oil

5 comments

Rate

dhanesh.koshti Commentator Join Date: May 2009 Location: Mumbai Posts: 73	BDV of Transformer Oil 04/07/2011 12:40 PM
	I am having one confusion about BDV of transformer oil. Usually oil with BDV=28-29 KV is considered ok. But my question is if the transformer rating is 132KV/66KV in that case also BDV value = 29KV is ok or is there any IE rule for BDV of transformer with different KV rating??? __________________ Thanks
	Register to Reply

Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!

PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#1 Re: BDV of transformer oil 04/07/2011 1:09 PM
	There's no confusion here. Just use the correct oil. Unless........ is acceptable? __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
	Register to Reply

PeterT Guru Join Date: May 2010 Location: Liverpool, NY Posts: 961 Good Answers: 131	#2 Re: BDV of transformer oil 04/07/2011 3:12 PM
	According to IEEE Std C57.106-2002, there are different breakdown voltage values depending on the voltage class of the oil-filled equipment. For a 132kV transformer, it falls smack in the middle of the range of 69kV-230kV, for which the minimum BDV is 28kV (ASTM D1816-97, with 1mm electrode gap). I would rate that oil acceptable if I were receiving the test results. __________________ To get the right answers, first you need to ask the right questions.
	Register to Reply

electricalexpert65 Guru Join Date: Oct 2009 Posts: 2061 Good Answers: 169	#3 Re: BDV of transformer oil 04/08/2011 10:03 AM
	BDV OF TRANSFORMER OIL (As per IS 6792:1992) The oil sample is subjected to a steadily increasing alternating voltage until breakdown occurs in a BDV test kit. The breakdown voltage is the voltage reached at the time of the first spark appears between the electrodes. The test is carried out six times on the same cell filling and the electric strength of the oil is the arithmetic means of the six results obtained. The electrodes are mounted on a horizontal axis with a test spacing of 2.5 mm. The value should be: Electric Strength (BDV) Vide IS 1866:2000, 30kV - for Voltages upto 72.5kV 40kV - Above 72.5kV upto 170kV 50kV - Above 170kV up to 420kV
	Register to Reply Score 1 for Good Answer

dhanesh.koshti Commentator Join Date: May 2009 Location: Mumbai Posts: 73	#4 In reply to #3 Re: BDV of transformer oil 04/09/2011 11:44 AM
	Dear Guru, Thanks for providing a good answer. But on 7th Apr why you have taken my question as a joke? & replied perfectly on 8th Apr???? Anyway, thanks again __________________ Thanks
	Register to Reply Off Topic (Score 5)

electricalexpert65 Guru Join Date: Oct 2009 Posts: 2061 Good Answers: 169	#5 In reply to #4 Re: BDV of transformer oil 04/09/2011 12:02 PM
	Dear Sir, Please take a close look. On 7th it was not me, but M. Slack, who had answeredyour query. I answered your query first and only on 8th April. I do not play jokes on people who are sincere to learn.
	Register to Reply Off Topic (Score 5)

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!

Copy to Clipboard

	Got Something to Say?
	Ask a Question Start a Discussion

	Aerospace
	BioMech & BioMed
	Chemical & Material Science
	Civil Engineering
	Communications & Electronics
	Education and Engineering Careers
	Electrical Engineering
	General Discussion
	Instrumentation
	Manufacturing
	Mechanical Engineering
	New Technologies & Research
	Software & Programming
	Sustainable Engineering
	Transportation

	Site Directories
	Forum Directory Blog Directory User Group Directory RSS Feeds CR4 Rules of Conduct CR4 FAQ Site Glossary Who's Online (44 right now) Show Members