Low-voltage combined type fuse blade switch on outdoor pole

Abstract

In order to solve the potential safety hazard of grounding in the low-voltage fuse switch, a low-voltage combined fuse switch on an outdoor pole is provided. The overall combination structure of body fuse knife switch is equipped with a grounding switch mechanism composed of grounding moving contact linkage assembly and grounding static contacts on the load side. The base rotates and cooperates to drive the grounding moving contact blades of each pole fixed on it by the key to cooperate with the grounding static contact switch; one end of the linkage shaft is also provided with a grounding opening and positioning mechanism. The technical solution provides a grounding switch device that directly completes the reliable grounding of the feeding wire or cable at the low-voltage secondary output side of the transformer. It is easy to operate, ensures the safe operation performance of the power grid, and avoids the occurrence of personal casualties.

Description

technical field [0001] The patent application of the present invention relates to the low-voltage fuse knife switch technology on the secondary low-voltage outlet side of a 10KV / 0.4KV distribution transformer. Background technique [0002] The existing low-voltage fuse knife switch is a single-piece unipolar structure, which is supported by two post insulators, and its main structure is formed by the switch of the upper end switch static contact part and the main knife frame of the fuse body. Safety ground mechanism setting. When the high-voltage side of the transformer is powered off, when performing relevant operations or maintenance on the high-voltage side or low-voltage side, it is necessary to mount a safety grounding wire on the busbar, but if there are problems such as human operation or the quality of the grounding wire itself, poor grounding will occur , or the connection is not firm or even falls off, especially in remote mountainous areas, the grounding wire may...

AI Technical Summary

Problems solved by technology

When the high-voltage side of the transformer is powered off, when performing relevant operations or maintenance on the high-voltage side or low-voltage side, it is necessary to mount a safety grounding wire on the busbar, but if there are problems such as human operation or the quality of the grounding wire itself, poor grounding will occur , or the connection is not firm or even falls off, especially in remote mountainous areas, the grounding wire may not be connected at all and the maintenance operation may be performed directly. At this time, the power load equipment of the end user on the low-voltage side, such as UPS inverter, generator , capacitor compensator, or other network power is sent back, causing dangerous electric shock accidents, or feeding back a high voltage of more than 10,000 volts from the primary high-voltage side by the secondary input, which will seriously endanger the life safety of the operator

Therefore, it is necessary to solve the potential safety hazard of grounding in the existing low-voltage fuse switch.

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