JPS5476939A - Enclosed switchboard - Google Patents

Abstract

PURPOSE: To promote an improvement of cooling efficiency for the contained equipment, by accommodating only a minimum part, required for dust prevention, in the dust-proof room.

CONSTITUTION: Equipments and control parts, probably losing their functions if located in a dusty environment, are accommodated in equipment rooms 2 to 5 or control rooms 51a, 51b, with a protection made from a dust. For temperature rise in the equipment itself or the equipment room, caused by a heat generaton of the equipment contained in the equipment rooms 2 to 5, a cool air, in the surroundings of the enclosed switchboard, flowing through an air ventilating path A to E or cooling groove G to I of the equipment room, can make a cooling of the equipment room from all of the surroundings with a heat radiation enabled in the equipment room. In addition, a cool air, outside the switchboard, in-flowing from the ventilating air path A to E, goes up while cooling a conductor arranged in a bus room 47, being released from an exhaust hole F. In this way, a heat generation of the equipment itself contained in the equipment room can be radiated to the exterior of the enclosed switchboard through the conductor installed within the bus room 47.

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