A kind of 800kv isolating switch

Abstract

The invention relates to an 800KV disconnector which comprises a bottom frame, a grounding switch, a conducting rod, three groups of insulating columns and operating mechanisms. The insulating columns are parallelly mounted at the upper end of the bottom frame, voltage sharing rings are mounted at the upper ends of the insulating columns, the conducting rod is matched with static contact fingers on the voltage sharing rings at two ends of the conducting rod after the conducting rod penetrates the voltage sharing ring which is positioned on the upper side of the middle insulating column, the operating mechanisms are mounted at the side ends of the bottom frame, arc striking devices are arranged between the conducting rod and the static contact fingers, the conducting rod can be driven by double shift fork mechanisms to rotate along the axial directions of the double shift fork mechanisms, and the static contact fingers are of double-return contact finger structures. The 800KV disconnector has the advantages that movable arc striking sheets and static arc striking sheets lag, are separated from one another and effectively protect main contactors under the effects of torsion springs during opening, and can be assuredly in reliable contact with one another by the torsion springs; each shift fork is divided into a left portion and a right portion, accordingly, turnover force can be generated by a left portion and a right portion of the conducting rod, and the conducting rod can be stably turned over; the static contact fingers are double-return contact fingers, so that the radiating area can be enlarged, conducting circuits can be expanded, and the performance of products can be improved.

Description

technical field [0001] The invention relates to an isolating switch, in particular to an 800KV isolating switch. Background technique [0002] Isolation switch (disconnector), that is, in the divided position, there is an insulation distance between the contacts that meets the specified requirements and an obvious disconnection mark; when it is in the closed position, it can carry the current under normal circuit conditions and abnormal conditions within the specified time ( Switching devices for currents under such as short circuit). Isolating switch (commonly known as "knife switch") generally refers to a high-voltage isolating switch, that is, an isolating switch with a rated voltage of 1kV and above, usually referred to as an isolating switch. The working principle and structure are relatively simple, but due to the large amount of use and high reliability requirements, it has a greater impact on the design, establishment and safe operation of substations and power plan...

AI Technical Summary

Problems solved by technology

First of all, for the contacts and fingers that conduct current, the contact fingers are all single-circuit contacts. The heat dissipation area of ​​the single-circuit contacts is small, the space utilization rate of the contacts is low, and waste materials; secondly, for its arc striking Most of the contacts are placed outside the static contacts, which will cause greater resistance to the opening and closing of the isolating switch, which is not conducive to the opening and closing operation of the isolating switch. At the same time, most of the arcing contacts of the isolating switch in operation now have two Arc striker, in the sliding process, the ablation speed of this structure is fast, and the reliability is low. Most of the arc strike contacts currently in operation use self-supporting contacts, and the long-term operation of the contacts loses elasticity, which brings hidden dangers to the operation of the power grid. ;Finally, the flipping of the conductive switch knife after rotation is a commonly used structure of the three-column horizontal flip type outdoor high-voltage isolating switch. The rod begins to flip axially around the conduit

In the existing structure, some are driven by gears, and some are driven by a single fork, but in the end, the missile tube is driven on one side, and the transmission is not stable.

Images