HI Voltage filters? Aluminium casting? Hmmmmm...we make them in steel. Today we have no leakers, but in those early days when the design was young, we had leakage problems. Dielectric oil is a nasty soup, cleaning is done by means of solvents, alcaline stuff and DI. All schmoutz and waste is tanked and send to a destruction facility somewhere. What's the problem?
Ingemar Hernefjord
Ericsson Microwave Systems



-----Original Message-----
From: TechNet [mailto:[log in to unmask]]
Sent: den 21 december 2004 22:27
To: [log in to unmask]
Subject: [TN] cleaning question - for electronic enclosures


We have a large aluminum casting
Good afternoon,



We have a large aluminum casting (35 inches long by 10 inches wide by 10
inches high and weighs about 75 pounds) that forms the outer enclosure
of a finished product.  After full assembly this unit it filled with
dielectric oil.  For units which require repair after failure, we want
to clean out the old oil and any residue from the failure or from
machine shop rework.  We would like a system that does not drain into
the local sewer or waste water system.  Where this unit is used at 180kV
we need to get all the conductive schmoutz out.  What are recommended
cleaning methods?  Is there a MIL or NASA spec for cleaning large parts
like this?



I know that a final wash with DI water is probably the best, but what
would cut the oil best and what method of application?


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Phil Nutting

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