Resurrection of a CFEI 100 KVA Induction Furnace

The Craftmans Shop > New from Old

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Sea.dog:
Only if you're having problems with your hair, Phil :lol:

awemawson:
Glad to hear that Phil, as Terry has completed all the joints, and will return to give it all a full coat with, again, emphasis on the joints, but covering everything, tomorrow. It was nice and warm today so it went on very nicely.

Meanwhile I built up the new 3 phase sub-panel ready for installation, and stripped the paint off some more 50 mm box section ready for mountings for the panel, water panel, and various sockets.

Later we laid the flow and return pipes between the bore hole, pump house and foundry. The return goes to the over flow pipe under the man hole cover via a 90 degree bend - no doubt this will confuse someone in the future! But the flow is at the moment not yet connected to the pump. Their ends now emerge in the foundry waiting for me to make up their termination panel.

hermetic:
Sorry seadog, all I heard was the whooshing noise as that went straight over my head, although I do have to wear one of my (daughters old tights) hairnets when I use Chromapol....there have been messy disasters!
Phil

awemawson:
Today's task: form supports for the electricity sub-panel, water panel and 3 phase sockets. I cut six suitable lengths of the 50 mm box section that I cleaned up yesterday, welded a pair for the sub-panel, but before I could use the grinder or welder near the flow and return water pipes they needed protecting from sparks.

Simple solution (I thought!) slip a bit of scaffold tube over them. It wasn't until I was welding that the weight of the scaffold tube managed to kink the MDPE pipe :bang: It's no big deal - both these pipes emanate from 90 degree elbows at sub-ground level so are quite short - I'll just replace them as I'm not short of 32 mm MDPE pipe. They'd probably be fine having been unkinked, but silly to take the risk.

Then I drilled and tapped for the electricity sub-panel and wired in both ends of it's feed. Irritatingly I found that the brand new 30 mA RCD trip was faulty. It doesn't trip when it's test button is pressed - replacement on the way tomorrow

hermetic:
"I found that the brand new 30 mA RCD trip was faulty. It doesn't trip when it's test button is pressed"

Doesn't tend to boost ones confidence in modern electrical equipment does it? Probably made in China. I wonder if it would have tripped in fault conditions, given that the test button simulates a fault, one would suspect not, meaning of course that the faulty circuit would have no upstream protection except the 100amp cutout fuse. God bless the IET, they really know what they are doing by getting rid of those dangerous old rewirable fuses that always fail safe!

Under the old IEE regs, written by engineers, not equipment manufacturers,

"No electromechanical device may be fitted to any circuit as a SOLE means of protection against fault currents".

Rant mode to "OFF"
Phil

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