High voltage circuit breaker with cooling

A circuit breaker having an elongated inner conductor and an outer conductor which surrounds the inner conductor like a housing,

• wherein
• at least one heat pipe is provided in order to dissipate thermal energy from the inner conductor, extends from the inner conductor to the outer conductor, and has an insulating hollow body in order to form an electrical insulating gap,
• the heat pipe contains a working medium for dissipation of the thermal energy by vaporization of the working medium in a section of the heat pipe which is referred to as an evaporator, and by condensation of the working medium in a section of the heat pipe which is referred to as a condenser,
• the condenser is in close thermal contact with the outer conductor and/or has an apparatus for heat emission,
• the evaporator is in close thermal contact with the inner conductor, and
• the heat pipe has a flexibly deformable section arranged in the heat pipe between the evaporator and the condenser in order to avoid high mechanical loads on the heat pipe.

A circuit breaker having an elongated inner conductor and an outer conductor which surrounds the inner conductor like a housing,

• wherein
• at least one heat pipe is provided in order to dissipate thermal energy from the inner conductor, extends from the inner conductor to the outer conductor, and has an insulating hollow body in order to form an electrical insulating gap,
• the heat pipe contains a working medium for dissipation of the thermal energy by vaporization of the working medium in a section of the heat pipe which is referred to as an evaporator, and by condensation of the working medium in a section of the heat pipe which is referred to as a condenser,
• the condenser is in close thermal contact with the outer conductor and/or has an apparatus for heat emission,
• the evaporator is in close thermal contact with the inner conductor, and
• the heat pipe is designed in such a way that an electrical high voltage (HV) of up to HVmax can be applied permanently across the insulating gap in a temperature range from Tmin to Tmax which can be measured at the evaporator, without this resulting in any breakdowns in the area of the insulating gap, wherein the heat pipe contains a partial pressure (p) of an auxiliary gas, which is not the same as the working medium, with the provision of the auxiliary gas resulting in no breakdowns occurring in the area of the insulating gap when the high voltage HVmax is present across the insulating gap at the temperature Tmin while, in contrast, breakdowns occur in the area of the insulating gap when the auxiliary gas is not present but the high voltage HVmax is present across the insulating gap at the temperature Tmin.