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Deepak.9
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Buchholz Relay

09/19/2011 2:55 AM

what is the main reason behind putting the buchholz relay at some angle(5-7 degree)?
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kvsridhar
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#1

Re: Buchholz Relay

09/19/2011 3:15 AM

Please check this old thread : http://cr4.globalspec.com/thread/55884

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Tornado
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#2

Re: Buchholz Relay

09/19/2011 3:23 AM

This sounds like a scheme to ensure that gas or vapor can move uphill, while liquid can drain downhill (countercurrent two-phase flow). This is only a guess; a picture would help. Just what is tilted at 5-7°?

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Deepak.9
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#3
In reply to #2

Re: Buchholz Relay

09/19/2011 3:44 AM

Buchholz relay mounting Pipe which is used to connect the transformer tank to Conservator is tilted to 5 to 7 degree.
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Tornado
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#4
In reply to #3

Re: Buchholz Relay

09/19/2011 3:53 AM

In that case, I stand by the conjecture in post 2.

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kvsridhar
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#5
In reply to #3

Re: Buchholz Relay

09/19/2011 5:07 AM

You must be very busy, no time for one mouse click...

Nevertheless, Tornado gave the right answer.

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Deepak.9
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#6
In reply to #5

Re: Buchholz Relay

09/19/2011 6:29 AM

I check there but he described about need of angle, but my question is why 5-7 degree why not 10 to 20 or......?
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kvsridhar
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#7
In reply to #6

Re: Buchholz Relay

09/19/2011 6:54 AM

Well, your question didn't read that way, sorry.

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TonyS
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#8
In reply to #6

Re: Buchholz Relay

09/19/2011 8:56 AM

The steeper the angle the more gas bypasses the chamber.

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Tornado
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#9
In reply to #6

Re: Buchholz Relay

09/19/2011 10:02 PM

If the angle is too small, the liquid won't flow downhill well. If too large, the liquid can form into slugs that block the upward flow of vapor. For the given 5-7°, the liquid flows smoothly along the bottom part of the pipe, while vapor flows openly above the liquid.

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