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Joined: Oct 2000
Posts: 3,682 Likes: 3
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Joined: Sep 2005
Posts: 97
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Thats quite an impressive demonstration. I think I will sort out the cleaning of our switchgear now! it is full of grinding dust and smoke. I guess that under the right conditions, it could explode!
I took my time, I hurried up, The choice was mine, I didn't think enough
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Joined: Dec 2005
Posts: 869 Likes: 4
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Very interesting test you have done there Brian.
Exactly what you show there is what happens in the real world.
I deal a lot with intermittend HT faults on 11 kV transformers. Dirty bushings cause a flasover, blow HT fuse. I always insist that the line crews disconnect the 11 kV cables prior to do an insulation test on the cable because of that reason.
I will do a similar test with a 5 kV megger, to show some of our fault staff why cables and bushings have to be clean.
Thanks for those great photo's
Regards, Raymond
The product of rotation, excitation and flux produces electricty.
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Posts: 44
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