GAS-INSULATED ELECTRICAL INSTALLATION INCORPORATING ELECTRIC-ARC GENERATED ENERGY DISSIPATING DEVICE Russian patent published in 2007 - IPC H02B13/25 

FIELD: electrical installations.

SUBSTANCE: proposed electrical installation has electrical equipment shell mounted on cooler box open outside. Outlet hole provides for communication between tank and cooler box. This hole is closed with membrane or shutoff valve. Screen divides cooler box into top space and bottom one. Screen is covered with solid loose material layer whose upper surface remains loose. This material should be better porous and also should incorporate dust. Upon occurrence of internal arc shock wave escaping the tank is quenched due to surface deformation of solid material layer. Incandescent particles escaping the hole are stopped by solid material layer. Hot gases are cooled down while passing through material and cause formation of dust cloud which interferes with inflammation.

EFFECT: enhanced reliability of electrical installation protection against internal arc aftereffect by using low-cost and small-size device.

12 cl, 3 dwg, 1 tbl