Electrical switching device and process for cooling a switching medium in an electrical switching device
A technology of electrical switches and media, applied in the direction of electrical switches, high-voltage/high-current switches, electrical components, etc., can solve problems such as problems, and achieve the effects of improving heat absorption, efficient heat absorption, and improving cooling
Active Publication Date: 2019-10-01
HITACHI ENERGY SWITZERLAND AG
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- Application Information
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Problems solved by technology
Despite the environmental friendliness of the alternative switching media according to WO 2013 / 087687, problems may arise due to the decomposition of organic fluorine compounds when subjected to the high temperatures present during arc combustion
Method used
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Embodiment Construction
[0123] Such as Figure 1 to Figure 3 As shown in , the circuit breaker of the present invention comprises a switch chamber 10 which, in the embodiment shown, is rotationally symmetrical and extends along a longitudinal axis L. As shown in FIG. The switch chamber comprises a tank wall 11 which delimits a tank space 13 .
[0124] The switching chamber 10 comprises two nominal contacts 12 movable relative to each other in the axial direction, in particular a main contact as a first nominal contact 121 and a contact as a second nominal contact 122 cylinder. The second nominal contact 122 surrounds the concentrically disposed nozzle assembly 14, wherein the nozzle assembly 14 includes the nozzle 16, and the second nominal contact 122 further surrounds the conductive portion 18, wherein the conductive portion 18 forms a self-blowing Wall of space 17. The nozzle assembly 14 further surrounds two concentrically disposed arcing contacts 19 , one in the form of a hollow tubular conta...
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The invention relates to an electrical switching device having a switching chamber (10) comprising at least two arcing contacts (192, 192) movable relative to each other and defining a An arc region (22) in which an arc (20) is formed during current interruption operation, wherein the switching chamber (10) is filled with a switching medium (20) for arc extinguishing and dielectric insulation. The switchgear (10) also includes an exhaust space (40, 62) fluidly connected to the arcing area (22) to allow switching medium heated by the arc (20) to flow out of the arcing area (22) To the exhaust space (40, 62) and thus heat transfer to the surface area of the metallic components of the switch chamber (10). The device is characterized in that at least a part of the surfaces contained in the switching chamber (10) is covered with a porous layer (72).
Description
technical field [0001] The invention relates to an electrical switching device comprising at least one switch compartment, in particular to a circuit breaker or a generator circuit breaker. The invention also relates to a process for cooling a switching medium in an electrical switching device, in particular a circuit breaker or a generator circuit breaker. Background technique [0002] In conventional circuit breakers, a switching gas (also referred to as "arc extinguishing gas") is used to extinguish the arc formed during the current interruption operation. For this purpose, the circuit breaker comprises one or more switching chambers connected in series, which are filled with switching gas and, according to one of the conventional principles for extinguishing the arc generated in the arcing area (e.g. via e.g. Self-blowing mechanism or conventional blow-assisted mechanism) to operate. The hot gas generated during arc extinguishing flows from the arc starting area in the...
Claims
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IPC IPC(8): H01H9/30H01H9/52H01H33/58H01H33/22
CPCH01H9/302H01H9/52H01H33/22H01H33/58H01H2009/305H01H2009/526H01H33/7015H01H2033/888
Inventor M.德霍特雷J.曼蒂拉弗洛雷兹J-C.毛鲁O.科斯萨特S.科蒂莱恩叶向阳S.格罗布
Owner HITACHI ENERGY SWITZERLAND AG