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Got called to look at a TIG welder at a local engineering factory. The welder was plugged into an extension lead, 3phase 32A SY flex. Nearly every morning when it was turned on it would trip the local c32 mcb and the c40 feeding the submain to the local DB. Then you could reset the mcb's and try again and the welder would be fine, running all day with no problem.
They tried plugging the welder directly into the 32A socket on the wall, and this never had any problems with tripping.
The lead had all tight connections, meggered and meggered at 500M.
I believe I have now rectified the problem, as it has been fine now for a few days.
Any ideas as to what I think caused the problem?
They tried plugging the welder directly into the 32A socket on the wall, and this never had any problems with tripping.
The lead had all tight connections, meggered and meggered at 500M.
I believe I have now rectified the problem, as it has been fine now for a few days.
Any ideas as to what I think caused the problem?