transformer room construction
transformer room construction
(OP)
Our client has a old transformer that is powering an electric arc furnace. They want to replace the existing transformer with a larger one (over 100 MVA). The field generated by the existing unit induced currents in the elevated concrete floor slab reinforcing bars that raised the floor temperature to a little over 100 degrees F. We are replacing the floor with cast in place concrete and non-magnetic rebar. A question came up about also possibly using steel beams to support the floor. Will currents be generated in the beams and cause them to heat up as well (assuming the floor is about 12" to 18" thick)?





RE: transformer room construction
And yes, the beams would heat also. How much depends.
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P.E. Metallurgy, Plymouth Tube
RE: transformer room construction
I agree the beams will heat. Ground them with dedicated ground rods.
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RE: transformer room construction
Dik
RE: transformer room construction
RE: transformer room construction
The beams will not be damaged, even common structural steel will take 800F without a problem.
The issues are things like thermal expansion and does a hot beam become a safety hazard.
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P.E. Metallurgy, Plymouth Tube
RE: transformer room construction
RE: transformer room construction
https://www.youtube.com/watch?v=yk4ACjzDFRY
I like the demo at the end, after 4:00, with a steel ball dropped into an aluminum tube and descending slowly.
RE: transformer room construction
RE: transformer room construction
Dik
RE: transformer room construction
*After its completion, we spread rumors about the Navy secretly discovering and chasing a sea monster all around Hawaii for three years before they finally built a cage to hold it. And it took all that electricity to keep the beast restrained. This rumor was quickly squelched. Have you ever heard it?