A self-resetting fuse for secondary power transmission
A fuse and self-recovery technology, applied to circuits, electrical components, emergency protection devices, etc., can solve problems such as manual closing, hidden safety hazards, troubles, etc., and achieve the effect of reducing manpower waste and improving safety
Active Publication Date: 2022-04-12
国网甘肃省电力公司兰州供电公司
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Problems solved by technology
In this process, in order to ensure the response of the latter, it is necessary to add parallel resistors at both ends of the former, so that the operating current required for tripping can be provided to the latter after a circuit fault. The application circuit is complex and the equipment cost is high.
[0004] The electrical connection usually requires secondary power transmission to avoid accidentally injuring the maintenance personnel on the lower branch during the power transmission process, and the self-resetting fuse does not have the process of secondary power transmission when the power supply is restored. Therefore, if the self-resetting fuse is connected in series If there are other switching circuits, manual closing is still required, which is troublesome. If there are no other circuit switches in series, there will be a greater safety hazard
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[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0023] see Figure 1-5 , a self-resetting fuse for secondary power transmission, including a housing 1, the housing 1 is made of austenitic stainless steel, a beryllium oxide ceramic core is embedded in the center of the housing 1, and a glass body is filled between the stainless steel and the ceramic core. Sealing and strong ceramic core, both ends of the shell 1 are provided with terminal electrodes 2, between the two terminal electrodes 2 are provided with ...
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The invention relates to the technical field of electrical safety, and discloses a self-resetting fuse for secondary power transmission, which includes a housing, and terminal electrodes are arranged at both ends of the housing, and a terminal electrode is arranged between the two terminal electrodes in turn. There are a fuse cavity, an energy storage piston and an air cavity, and the energy storage piston includes a first plunger and a second plunger. The self-resetting fuse for the secondary power transmission will quickly blow off when the abnormal current passes through for the first time, and then recover by itself, and when the abnormal current passes through for the second time, the reset will be stuck to avoid repeated power on and off. Since the reset of the ejector rod is delayed, the second abnormal current within the preset time will trigger a permanent power failure, reminding the staff to find out the fault, and absorb the potential energy released when the fuse chamber is vaporized through the energy storage chamber. And when the energy storage piston is reset, it is released to temporarily cut off the power. The power recovery process has gone through two power transmissions. The maintenance personnel of the lower line will get an early warning and break away from contact in time when the power is supplied once.
Description
technical field [0001] The invention relates to the technical field of electrical safety, in particular to a self-resetting fuse for secondary power transmission. Background technique [0002] Such as Figure 6 As shown, the existing self-resetting fuse mainly consists of electrodes, melt, piston and argon-filled cavity. Under normal working conditions, the melt resistance is small and a current path is formed. Sodium is vaporized into a plasma state, and the resistance increases sharply, which acts as a strong current limiter. After the temperature recovers, the argon pushes the piston to compress the metal sodium, and the metal sodium returns to liquid or solid state, and the circuit is reconnected. [0003] From the above process, it can be seen that if the fault of the load circuit is not eliminated, the self-resetting fuse will continue to repeatedly turn on and off the circuit. In order to avoid this phenomenon, the self-resetting fuse will be used in conjunction with ...
Claims
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IPC IPC(8): H01H85/05
CPCH01H85/05
Inventor 陈垠杰
Owner 国网甘肃省电力公司兰州供电公司