摘要:
The present invention relates to a dielectric insulation medium comprising a) a fluoroketone a) containing 5 carbon atoms, in a mixture with b) a dielectric insulation gas component b) different from the fluoroketone a), in particular air or an air component, the dielectric insulation medium, in particular the dielectric insulation gas, having a non-linearly increased dielectric strength that is larger than a sum of dielectric strengths of the gas components of the dielectric insulation medium.
摘要:
A contact arrangement has a longitudinal axis (z) and comprises at least a first contact (4a) and at least a second contact (4b) interacting electrically and mechanically with each other for closing and opening the contact arrangement. The first contact (4a) is surrounded by a protecting cover element (2) in such a way that a contacting extremity of the first contact (4a) protrudes beyond the cover element (2). The first contact (4a) and the cover element (2) are arranged with respect to one another in such a way that a gap (7) is provided between them along at least a portion of their elongation, wherein the gap (7) has a first opening (10) towards a first volume (15) surrounding the first contact (4a). The cover element (2) comprises at least one chamber (9) connected at least to the gap (2).
摘要:
The present invention relates to a circuit breaker comprising an ejection device (8, 9; 80, 90) comprising a compartment (14a), in which an arc-extinction medium (18; 18a, 18b) for improving circuit breaker operation is contained, and having an ejection orifice (17) through which the arc-extinction medium (18; 18a, 18b) is to be ejected, wherein the ejection orifice (17) opens out into an injection zone (5, 6, 71) of the circuit breaker (1) in which the pressure is lower than in an arcing zone (32) when an arc is present, and wherein the arc-extinction medium (18; 18a, 18b) and/or exhaust-cooling medium (18; 18a, 18b) is at least partially present in liquid form, when it is contained in the ejection device (8, 9; 80, 90).
摘要:
A simplified construction of a gas-insulated high-power circuit breaker with a saving of components is achieved by at least one hole and at least one leaf spring, which is fastened on one side and is elastically bendable in dependence upon the pressure of the insulating gas in the compression volume, being formed in a valve plate of the valve. The bendable spring closes off the hole when the circuit breaker closes and opens it when the circuit breaker opens as soon as the pressure of the compressed insulating gas in the compression volume exceeds the value of the gas pressure in the low-pressure chamber by at least two bar.