Means for protecting underground electrical equipment from...

Details Means for protecting underground electrical equipment from... Means for protecting underground electrical equipment from...

H - Electricity

02

G

189/19, 31/34

H02G 9/02 (2006.01)

Patent

CA 1076495

Abstract of the Disclosure Underground electrical equipment such as a trans- former or cable is prevented from thermal runaway by back- filling the trench in which it is laid with a soil which includes water entrapped in highly water-absorbent hydro- philic polymeric gel particles soaked with water. The water-soaked particles preferably are coated with a water- impermeable film. The water may also be entrapped in liquid form in small balloon-like containers. Also, a water im- permeable sheath may be formed around the back-fill soil to minimize evaporation from the particles.

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