SINGLE PHASE 7200 VOLT TRANSFORMERS

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LECTRICBOSS

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MOORE, OK. USA
I have 3-167kva 7200 volt transformers feed from a 12470/7200 volt system and according to the manufacturer the 7200v primary comes in to H1 and H2 is grounded. Do they make a special elbow for this grounded loadbreak or do you just use a 200 amp 15kv loadbreak elbow and make your own? Would there be a problem with making your own?
 
LECTRICBOSS said:
I have 3-167kva 7200 volt transformers feed from a 12470/7200 volt system and according to the manufacturer the 7200v primary comes in to H1 and H2 is grounded. Do they make a special elbow for this grounded loadbreak or do you just use a 200 amp 15kv loadbreak elbow and make your own? Would there be a problem with making your own?
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Interesting. Since you have provided very little if no information regarding the transformers the first thought would be pole mounted transformers. Is it to be assumed that these are liquid filled?
But then you mention elbows which are commonly used on underground, padmounted transformers.
It also appears that the transformers are existing and that you are asking if you can add load break elbows to them.
Messing around with MV 15kv rated gear is not like working with LV gear.
 
If these are conventional oil filled padmounts, and I don't know if they are, there are two holes on the primary side for MV cables. One is an in and the other is an out to feed the next padmount transformer with a common tie inside the can. The transformer high side coil taps off that and the H2 is the transformer case. This should be interesting if we get to see a data plate or a picture.
 
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