Arubber jacket around the outside of the cable permits cooling water for the cable.The rubber hose is attached ateither end of the cable using stainless steel clamps , vulcanized bumpers or an anti-chaffing hose. The cooling water hoseis covered with a protective sleeve which may be fabricated of fiberglass, vulcanized material, and silicon or aluminumglass fiber sleeves.As cable design advanced, it was noted that due to the "skin effect" typical of AC operations, thecurrent was carried predominantly by the outer portion of the copper strands. Therefore the center strands were replacedwith a hollow rubber tube which reduced the cable weight, the reactance and the cost of the cable.At a later date, someoperations used this inner channel for water cooling as well.
In DC furnace operations, the inner rubber tube in the cable is used for cooling because DC operations do not
experience the "skin effect" and the whole cross section of the copper cable carries the current uniformly. However, DCcables are cooled more effectively from the center and cooling from the outside is not always used.
VILLE INDUSTRY CO.,LTD.
Contact:Green Hsu
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