Pressure Potting
Thomas F, Sun Nov 08 2020, 12:38PMHello ,
I was watching a few videos on pressure potting of resins. Primarily people seem to be using it for cosmetic purposes to remove bubbles.
Is it practical to use this method for potting high voltage resins ? The main advantage seems to be that :
1) The resin will not overflow the container.
2) Curing time can be reduced.
Has anyone tried this ? Any recommendations for a suitable resin in case someone has tried this ?
Cheers
Thomas
Re: Pressure Potting
RoV IW3IPD, Sun Dec 27 2020, 09:10PM
normally better to do potting under vacuum for the same reason. Removing bubbles improves dielectric strenght. The procedure requires also to degass the resin for some time before.
RoV IW3IPD, Sun Dec 27 2020, 09:10PM
normally better to do potting under vacuum for the same reason. Removing bubbles improves dielectric strenght. The procedure requires also to degass the resin for some time before.
Re: Pressure Potting
Terry Fritz, Thu Dec 31 2020, 11:11AM
I have seen these things done in real life....
You vacuum out everything at first to get all the air out of the potting while it is still very wet. Vibration helps a lot!
Then, when all the bubbles are out, you want to pressurize it again to squeeze down any voids...
No giant vacuums are needed and best to repressurize at normal ATM....
If you do it right. You can slice up the test potting and there will be zero bubbles or voids.
T.
Terry Fritz, Thu Dec 31 2020, 11:11AM
I have seen these things done in real life....
You vacuum out everything at first to get all the air out of the potting while it is still very wet. Vibration helps a lot!
Then, when all the bubbles are out, you want to pressurize it again to squeeze down any voids...
No giant vacuums are needed and best to repressurize at normal ATM....
If you do it right. You can slice up the test potting and there will be zero bubbles or voids.
T.
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