Transformer

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vikky_rathi Participant Join Date: Sep 2007 Posts: 4	Transformer 09/10/2007 12:25 AM
	What should be the minimum distance between 11KV Power Transformer & the side wall.
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Mr. Truman Brain Guru Join Date: Mar 2007 Location: South-east corner of Spain 50 48 49.24N 2 28 27.70W Posts: 1508 Good Answers: 31	#1 Re: Transformer 09/10/2007 12:45 PM
	The terminals should be more than 11cm from anything but this is a bugger for maintainance on the transformer, it is well advised to leave a 40cm walking gap all the way round the transformed! Remember the drain plug or the earth tag are normally low down and with out the gap, you are making life very difficult! __________________ “It's kind of fun to do the impossible.” Walt Disney
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MUKULMAHANT Guru Join Date: Dec 2006 Location: Long.92E,Lat.26N Posts: 1336 Good Answers: 14	#2 In reply to #1 Re: Transformer 09/11/2007 9:35 AM
	The more the merrier.
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ca1ic0cat Guru Join Date: Jun 2006 Location: Rochester, NY Posts: 867 Good Answers: 11	#3 In reply to #2 Re: Transformer 09/11/2007 10:23 AM
	Minimums for this are often dictated by local code, so I'd check that. Are there any requirements for free air for cooling? If you do need to service the side of the transformer that is next to the wall you might need a meter of space to get a person in there. If there are any long parts that have to be removed from the side toward the wall make sure you have clearance to get the part out. Guess I've confused the issue enough for one morning. Good luck! __________________ Eric
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Mr. Truman Brain Guru Join Date: Mar 2007 Location: South-east corner of Spain 50 48 49.24N 2 28 27.70W Posts: 1508 Good Answers: 31	#4 In reply to #3 Re: Transformer 09/11/2007 10:53 AM
	I have done extensive field tests on the access space required by a 'normal' sized person to install and maintain a variety of transformers and have found that anything under 40cm is just asking for it! Anything over about a meter requires things like extra cable supports to stop excess stress on the terminals, both HV and LV sides! This may sound simple to do, but when the roof of the transformer house is 16m or higher, it makes the install more difficult and expensive! Yes I know that not all roofs are that high and some are only a gnats cock from your head so make it comfy, even though most sparkies are contortionists, they don't need excess room either! Another point to make is the HV side of the transformer! This side is normally wall side with the LV side near the front for connecting to the LV cabinet! The HV cables have an insulation sleeve then the terminal. This section is recommended to be kept straight, after that the cable may need to be curved to where ever so anything under about 40cm will just make it harder to get the cables connected to the terminals! It's been a long day, and I just had to practice my English! sorry got to go for my siesta now! __________________ “It's kind of fun to do the impossible.” Walt Disney
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Michael B Active Contributor Join Date: Jun 2006 Posts: 10	#5 Re: Transformer 09/11/2007 12:28 PM
	I agree with "use your local code". In addition OSHA requires a minimum of 3 feet clearance around all transformers.
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Mr. Truman Brain Guru Join Date: Mar 2007 Location: South-east corner of Spain 50 48 49.24N 2 28 27.70W Posts: 1508 Good Answers: 31	#6 In reply to #5 Re: Transformer 09/11/2007 12:30 PM
	That's what it boils down to I suppose! look at your local codes! __________________ “It's kind of fun to do the impossible.” Walt Disney
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Anonymous Poster	#7 Re: Transformer 09/12/2007 7:04 AM
	Please, check National Electric Safety Code Serca
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Anonymous Poster (1); ca1ic0cat (1); Michael B (1); Mr. Truman Brain (3); MUKULMAHANT (1)

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