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SGL CARBON |
Tie & Operate the Rectiformers in Parallel
Ozark, Arkansas
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CV Engineering prepared a feasibility study to investigate upgrading the plant’s
120VDC, 140,000A bus for their graphitizing furnaces. The existing arrangement consists
of two 140,000A rectiformers powering one of two furnace-firing bays. The existing
bus layout does not permit the cross connecting of the firing bays with the two
rectiformer units. To increase operating flexibility, we investigated means of upgrading
the bus system to allow either of the two firing bays to be connected to either
of the two rectiformers or to both, allowing a maximum of 240,000A to be feed to
the furnace. This necessitated a review of the existing bus arrangement and isolation
switch arrangement, and the design of alternative bus arrangements. A report was
prepared outlining our findings and making our recommendations.
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