A cooling apparatus for a medium voltage switchgear includes an evaporator section; a fluid conduit; and a condenser section. The evaporator section surrounds a current carrying contact and is configured such that fluid within the evaporator section can contact an outer surface of the current carrying contact. The evaporator section is fluidly connected to the fluid conduit. At least part of the evaporator section is electrically insulating and is connected to the fluid conduit. The fluid conduit is fluidly connected to the condenser section. In use, a working fluid in the evaporator section is heated to a vapor state, the vapor is transferred by the fluid conduit to the condenser section, and the vapor in the condenser section is condensed to the working fluid. The working fluid is passively returned to the evaporator section.

A circuit breaker arrangement includes a housing, a contact seated in the housing, and a lead in electrical communication with the at least one contact and disposed outside the housing. The circuit breaker arrangement includes a heat sink in thermal communication with the lead to transfer heat between the contact and the lead.

Embedded cooling systems and methods of forming the same are disclosed. An embedded cooling system includes a PCB having a first major surface opposite a second major surface and power device stacks embedded within the PCB between the first major surface and the second major surface. Each power device stack includes a first substrate and a second substrate, and an electrical insulation layer disposed between the first substrate and the second substrate. The embedded cooling system further includes a power device coupled to the first substrate of each power device stack and heat pipes having a first end and a second end spaced a distance apart from the first end. The first end is embedded within the PCB substrate and the second end extends outside of the PCB substrate. The second substrate of the one or more power device stacks is coupled to the one or more heat pipes.

A system and method for an electric pole part apparatus, includes an electric interruption unit; a heat sink; and a heat pipe arrangement; wherein the heat pipe arrangement comprises a plurality of heat pipes enclosed at least partially by an outer housing; wherein a first end of the heat pipe arrangement is connected to the heat sink; and wherein a second end of the heat pipe arrangement is connected to the electric interruption unit.

A heat pipe includes an insulating hollow body located inside an outer conductor. The insulating hollow body insulates a portion of the heat pipe on an outer conductor side and a portion of the heat pipe on an inner conductor side from each other. The heat pipe has a plurality of sections each connecting a corresponding one of a plurality of connection conductors to the insulating hollow body. The heat pipe further includes a communication path connecting portions of the heat pipe to each other to cause the plurality of sections to be in communication with each other. Each of the portions is connected to a corresponding one of the plurality of connection conductors.

A cooling apparatus for a medium voltage or high voltage switchgear includes an evaporator, a fluid conduit, and a condenser. The evaporator is configured to surround at least part of a current carrying contact. The fluid conduit fluidly connects the evaporator to the condenser. A section of the fluid conduit is formed within the evaporator and is electrically insulating and is configured such that fluid can contact an outer surface of the current carrying contact. The cooling apparatus is configured such that in use a working fluid in the evaporator is heated to a vapour state, and the vapour is transferred by the fluid conduit to the condenser. The vapour in the condenser is condensed to the working fluid. The condensed working fluid is passively returned via the fluid conduit to the evaporator.

A system and method for an electric pole part apparatus, includes an electric interruption unit; a heat sink; and a heat pipe arrangement; wherein the heat pipe arrangement comprises a plurality of heat pipes enclosed at least partially by an outer housing; wherein a first end of the heat pipe arrangement is connected to the heat sink; and wherein a second end of the heat pipe arrangement is connected to the electric interruption unit.

Embedded cooling systems and methods of forming the same are disclosed. An embedded cooling system includes a PCB having a first major surface opposite a second major surface and power device stacks embedded within the PCB between the first major surface and the second major surface. Each power device stack includes a first substrate and a second substrate, and an electrical insulation layer disposed between the first substrate and the second substrate. The embedded cooling system further includes a power device coupled to the first substrate of each power device stack and heat pipes having a first end and a second end spaced a distance apart from the first end. The first end is embedded within the PCB substrate and the second end extends outside of the PCB substrate. The second substrate of the one or more power device stacks is coupled to the one or more heat pipes.

Particular embodiments described herein provide for an electronic device that includes a hybrid keyboard. The keyboard can include a first portion of keys with a first key travel and a second portion of keys with a second key travel. The second key travel is less than the first key travel and a support plate can be raised under the second portion of keys and cause the second portion of keys to have the second key travel. In an example, a heat pipe or some other component can be located under the raised support plate and second portion of keys with the second key travel.

A generator switch including an encapsulation lying at ground potential and an electrical conductor arranged in an insulated fashion inside the encapsulation and at high-voltage potential, as well as a gravity-driven cooling device having an evaporator and a condenser arranged above the evaporator and a coolant. The cooling device is formed as a closed loop-type coolant circuit. During operation of the generator switch, a level of the liquid coolant in the line system in a static cooling device is at least as high as the upper end of the insulating section in the insulator.