Cooling device for cooling medium-voltage switchgear by means of live heat pipes

Abstract

A cooling device including an evaporator operating with a phase-change heat-transfer fluid surrounding electrical switchgear operating at high voltage and connected to one or more condensers placed on a roof of a sheath in which the electrical switchgear is placed. The condensers are supported in this location by insulating elements that include side partitions that are to the side relative to a box, placed above the sheath and/or a central portion of the roof of the sheath. The cooling device consumes very little energy and does not require an electrically insulated cooling system to be designed and can be used, for example, for application to medium-voltage generator circuit breakers.

1 - 4 . (canceled) 
     
     
         5 . A cooling device for cooling medium-voltage switchgear placed inside a sheath, comprising:
 evaporators operating with a phase-change heat-transfer fluid, and placed about a casing of the switchgear;   condensers placed above the sheath; and   a box surrounding a top of the assembly,   wherein the evaporators and the condensers are in electrical contact with the medium-voltage switchgear, and insulating parts are provided for insulating the condensers relative to a roof of the sheath and to the box.   
     
     
         6 . A device according to  claim 5 , wherein the insulating parts include a central portion of the roof of the sheath for insulating the condensers relative to the roof of the sheath and on which they rest. 
     
     
         7 . A device according to  claim 5 , further comprising side partitions for channeling streams of air reaching the condensers of the box from the side. 
     
     
         8 . A device according to  claim 6 , further comprising side partitions for channeling streams of air reaching the condensers of the box from the side. 
     
     
         9 . A device according to  claim 5 , further comprising side ventilation means, which are placed outside the box, facing the side walls of the box.