# US 2014/0151202 A1 · Encapsulated Switchgear > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0151202 A1 - Document ID: US20140151202A1 - Status: Published application - Kind: A1 - Application number: 14/175,430 - Filed: 2014-02-07 - Published: 2014-06-05 - Earliest claimed: 2009-06-12 - Assignees: ABB Technology AG - Inventors: Maik Hyrenbach; Ole Granhaug; Max-Steffen Claessens; Per Skarby - Web page: https://patentgrep.com/patent/US20140151202A1 ## CPC - H01H 9/02: Bases, casings, or covers (accommodating more than one switch or a switch and another electrical component H02B1/26) - H01B 3/56: gases - H01H 11/00: Apparatus or processes specially adapted for the manufacture of electric switches (processes specially adapted for manufacture of rectilinearly movable switches having a plurality of operating members associated with different sets of contacts, e.g. keyboards, H01H13/88) - H02B 13/055: Features relating to the gas - H01H 33/56: Gas reservoirs - H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00) - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) - H02B: BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER ## Abstract An encapsulated switchgear that includes a housing defining, an insulating space, and an electrical active part arranged in the insulating space, the insulating space with an insulation medium. The switchgear is characterized in that the insulation medium with a dielectric compound having a boiling point of above −5° C. ## Claims ### Claim 1 An encapsulated switchgear comprising a housing defining an insulating space and an electrical active part arranged in the insulating space, said insulating space comprising an insulation medium, characterized in that the insulation medium comprises a dielectric compound having a boiling point of above −5° C. ### Claim 2 (depends on 1) The encapsulated switchgear according to claim 1, characterized in that the dielectric compound is a fluoroketone having from 4 to 8 carbon atoms. ### Claim 3 (depends on 2) The encapsulated switchgear according to claim 2, characterized in that the fluoroketone 6 carbon atoms. ### Claim 4 The encapsulated switchgear according 3, characterized in that the fluoroketone is a perfluorinated ketone having the molecular formula C6F12O. ### Claim 5 (depends on 1) The encapsulated switchgear according to claim 1, characterized in that at operational conditions the insulation medium comprises an insulation gas comprising a gaseous part of the dielectric compound, said gaseous part being in equilibrium with a liquid part of the dielectric compound. ### Claim 6 (depends on 5) The encapsulated switchgear according to claim 5, characterized in that the insulation gas is a gas mixture, which further comprises a carrier gas. ### Claim 7 (depends on 6) The encapsulated switchgear according to claim 6, characterized in that the carrier gas comprises air or at least comprises one air component. ### Claim 8 (depends on 5) The encapsulated switchgear according to claim 5, characterized in that it comprises a receptacle determined for comprising at least a portion of the liquid part of the dielectric compound comprised in the housing. ### Claim 9 (depends on 8) The encapsulated switchgear according to claim 8, characterized in that it further comprises collecting means for collecting at least a portion of the liquid part of the dielectric compound and transferring it to the receptacle. ### Claim 10 (depends on 5) The encapsulated switchgear according to claim 5, characterized in that it further comprises an indicator for determining the amount of the liquid part of the dielectric compound in the insulating space, said indicator being arranged in a space separate from the insulating space and being connected with the receptacle. ### Claim 11 (depends on 8) The encapsulated switchgear according to claim 8, the housing comprising a transparent area allowing the receptacle and/or the indicator, respectively, to be viewed from the outside. ### Claim 12 (depends on 1) The encapsulated switchgear according to claim 1, the switchgear being a metal-encapsulated switchgear. ### Claim 13 (depends on 1) The encapsulated switchgear according to claim 1, the switchgear being a medium voltage encapsulated switchgear. ### Claim 14 (depends on 5) A process for providing an encapsulated switchgear according to claim 5 by introducing a dielectric compound into the insulating space of the switchgear, wherein the amount of the dielectric compound introduced is such that at operational conditions the insulation medium comprises an insulation gas comprising a gaseous part of the dielectric compound, said gaseous part being in equilibrium with a liquid part of the dielectric compound. ### Claim 15 (depends on 14) The process according to claim 14, wherein the dielectric compound is introduced in liquid form, whereupon only a part of the dielectric compound evaporates into the insulating space. ### Claim 16 (depends on 15) The process according to claim 15, wherein the dielectric compound is introduced into the bottom part of the insulating space. ### Claim 17 A method of providing an insulation medium for an encapsulated switchgear, comprising the step of utilizing a dielectric compound having a boiling point of above −5° C. in said insulation medium for the encapsulated switchgear, said insulation medium comprising at operational conditions an insulation gas comprising a gaseous part of the dielectric compound, said gaseous part being in equilibrium with a liquid part of the dielectric compound. ### Claim 18 The encapsulated switchgear according 4, characterized in that the fluoroketone is dodecafluoro-2-methylpentan-3-one. ### Claim 19 (depends on 7) The encapsulated switchgear according to claim 7, characterized in that the at least one air component is selected from the group consisting of carbon dioxide, oxygen and nitrogen.