Consequence of Leak from main transformer tank to DETC Compartment
Consequence of Leak from main transformer tank to DETC Compartment
(OP)
One of our transformer has the leaks from main tank to the DETC compartment, likely the Barrier board between LTC & main tank failed due to faulty gasket.
What's the consequence if we leave it un-fixed soon?
Thanks
What's the consequence if we leave it un-fixed soon?
Thanks






RE: Consequence of Leak from main transformer tank to DETC Compartment
RE: Consequence of Leak from main transformer tank to DETC Compartment
David Castor
www.cvoes.com
RE: Consequence of Leak from main transformer tank to DETC Compartment
RE: Consequence of Leak from main transformer tank to DETC Compartment
I would discuss with the LTC manufacturer and transformer manufacturer. But probably you can live for a little while like this.
David Castor
www.cvoes.com
RE: Consequence of Leak from main transformer tank to DETC Compartment
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(2B)+(2B)' ?
RE: Consequence of Leak from main transformer tank to DETC Compartment
I would expect transformer failure in days or possibly hours if contaminated LTC oil leaks back into the transformer.
Bill
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"Why not the best?"
Jimmy Carter
RE: Consequence of Leak from main transformer tank to DETC Compartment
RE: Consequence of Leak from main transformer tank to DETC Compartment
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(2B)+(2B)' ?
RE: Consequence of Leak from main transformer tank to DETC Compartment
RE: Consequence of Leak from main transformer tank to DETC Compartment
SInce DETC is in the main tank for some models, does this indicate it will be ok if liquid leaks from main tank to the DETC compartment?
RE: Consequence of Leak from main transformer tank to DETC Compartment
David Castor
www.cvoes.com
RE: Consequence of Leak from main transformer tank to DETC Compartment
The compartment is called: Load Ratio Control Mechanism - Tap selector Compartment.
THe Liquid Lvl Gauge is for this compartment.
RE: Consequence of Leak from main transformer tank to DETC Compartment
The compartment is called: Load Ratio Control Mechanism - Tap selector Compartment.
THe Liquid Lvl Gauge is for this compartment.
RE: Consequence of Leak from main transformer tank to DETC Compartment
RE: Consequence of Leak from main transformer tank to DETC Compartment
RE: Consequence of Leak from main transformer tank to DETC Compartment
RE: Consequence of Leak from main transformer tank to DETC Compartment
RE: Consequence of Leak from main transformer tank to DETC Compartment
Yes you're right, the "On Load Tap Changer" is on the X side. It's my mis-understanding to identify it as the DETC.
So we may put in this way?
- The compartment of OLTC is much less sealed. There is no much acr generated in that compartment (not much comtamination), since it has never been operated. But if it starts to be operated, serious contamination will occur, and it can do the real damage to the transformer.
RE: Consequence of Leak from main transformer tank to DETC Compartment
In my experience, the locked off LTCs collect just as much if not more moisture than those running in automatic.
RE: Consequence of Leak from main transformer tank to DETC Compartment
RE: Consequence of Leak from main transformer tank to DETC Compartment
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If we learn from our mistakes I'm getting a great education!
RE: Consequence of Leak from main transformer tank to DETC Compartment
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If we learn from our mistakes I'm getting a great education!
RE: Consequence of Leak from main transformer tank to DETC Compartment
Coming to Beengineers query -Dont worry nothing is going to happen.You have said that DGA of main tank oil is OK. It means either the device is DETC,but more probably the leakage is from the tap-selector tank of OLTC and not from the diverter switch tank( where arcing occurs).In 50's and 60's it was a practice of some customers to demand tap selector part also in a separate tank.You can verify this by having a look at the rating and connection diagram plate and also service manual ,if available.
Even if the minor leak is from arcing chamber,normally it will not cause much problem for short periods except for the nuisance of obscuring trf DGA analysis and need for filtering main tank oil after rectifying the leak.
RE: Consequence of Leak from main transformer tank to DETC Compartment
RE: Consequence of Leak from main transformer tank to DETC Compartment
You may have to periodically draw some oil off from the diverter sample point to maintain the pressure differential if the leak is signficant or you are going to run for a prolonged period before maintenance takes place.
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If we learn from our mistakes I'm getting a great education!
RE: Consequence of Leak from main transformer tank to DETC Compartment
Some other related things to consider:
1 – dp drives the leak rate so there may be potential to overflow the LTC compartment.
2 – Diffusion can allow contaminants to travel opposite the direction of slow bulk fluid flow, so don't get a false sense of security from the dp. It is very common to see the oiler reservoir feeding rotating machine bearings turn grey from bearing oil contaminants (like wear of brass slinger rings), even though the oiler reservoir is at a higher level than the bearing.
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(2B)+(2B)' ?
RE: Consequence of Leak from main transformer tank to DETC Compartment
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(2B)+(2B)' ?