A coil type longitudinal magnetic field contact assembly and a vacuum interrupter
A technology of vacuum interrupter and contact assembly, which is applied to electrical components, high-voltage air circuit breakers, high-voltage/high-current switches, etc. Enhance the ability to break large currents, improve reliability, and enhance the effect of longitudinal magnetic field strength
Active Publication Date: 2020-10-13
PINGGAO GRP +2
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Problems solved by technology
[0005] The purpose of the present invention is to provide a coil type longitudinal magnetic field contact assembly, which aims to solve the problem that the contact blades in the coil type longitudinal magnetic field contact assembly in the prior art are easily ablated locally; the purpose of the present invention is also to provide A vacuum interrupter with the above-mentioned coil type longitudinal magnetic field contact assembly aims at the problem of poor durability of the vacuum interrupter in the prior art
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specific Embodiment 2
[0052] The difference between the second embodiment of the vacuum interrupter of the present invention and the first embodiment of the vacuum interrupter is that only the moving contact assembly in the vacuum interrupter of this embodiment is a coil type longitudinal magnetic field contact Assemblies, in other embodiments, only the static contact assembly in the vacuum interrupter may be a coil type longitudinal magnetic field contact assembly, and the others are the same as those in the first embodiment of the vacuum interrupter, and will not be repeated here.
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The invention relates to a coil type longitudinal magnetic field contact assembly and a vacuum interrupter. The coil type longitudinal magnetic field contact assembly comprises a conductive rod and acontact piece. A contact base and a freewheeling contact disc are fixedly connected between the conductive rod and the contact piece. The contact base and / or the freewheeling contact disc is / are provided with at least two curved overcurrent arms extending outwardly from the center. Each curved overcurrent arm comprises inner and outer overcurrent arms which are arranged inside and outside respectively and extend in opposite directions. The inner and outer overcurrent arms are connected end to end. The overcurrent directions of the inner and outer overcurrent arms are opposite. According to thecoil type longitudinal magnetic field contact assembly, two inner and outer overcurrent arms with opposite overcurrent directions on the curved overcurrent arms generate magnetic fields in opposite directions; the overall longitudinal magnetic field of the contact assembly is increased, and at the same time the magnetic field strength of the central area is reduced; and the probability of ablation of the central part of the contact assembly is reduced.
Description
technical field [0001] The invention relates to a coil type longitudinal magnetic field contact assembly and a vacuum interrupter. Background technique [0002] At present, sulfur hexafluoride circuit breakers occupy a dominant position in high-voltage and ultra-high-voltage circuit breakers. Sulfur hexafluoride gas has good insulation performance and excellent arc extinguishing performance, and its compressive strength is 2.5 times that of nitrogen gas under the same pressure. But sulfur hexafluoride gas is a greenhouse gas, and its single-molecule greenhouse effect is 22,000 times that of carbon dioxide. Therefore, vacuum circuit breakers have gradually become the future development direction of circuit breakers due to their advantages of less environmental pollution, less maintenance workload, and high performance stability. The current vacuum interrupter is mainly used for medium voltage level. In order to expand the application range of vacuum circuit breaker and make ...
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IPC IPC(8): H01H33/664
CPCH01H33/664
Inventor 费翔朱志豪袁端磊王海燕张洪铁耿晓璐
Owner PINGGAO GRP