Single ground combined ice melting isolating switch

Abstract

The invention provides a single ground combined ice melting isolating switch comprising a vertical opening type knife switch (113), a grounding switch (124), a horizontal telescopic knife switch operating mechanism (101), a first horizontal telescopic knife switch (106), a second horizontal telescopic knife switch (108) and a static contact (110), wherein the static contact (110) is supported by asecond horizontal opening operation insulator (109), the first horizontal telescopic knife switch (106) is provided with a rack (119), the second horizontal telescopic knife switch (108) is providedwith a gear (121) that is meshed with the rack (119), and the horizontal telescopic knife switch operating mechanism (101) drives the second horizontal telescopic knife switch (108) to be opened or closed with the static contact (110). By carrying out ice melting operation through the single ground combined ice melting isolating switch, not only the safety risk of the working personnel at high altitude can be avoided, but also the efficiency of the ice melting operation is greatly improved. The grounding switch is set to also realize the grounding protection of the AC outlet equipment to ensure the safety of the maintenance operation.

Description

technical field [0001] The invention relates to the field of structural design of an ice-melting isolation switch, in particular to a single grounding combined type ice-melting isolation switch. Background technique [0002] With the global climate change and the construction of UHV transmission projects, more and more high-voltage and ultra-high-voltage transmission lines crossing ice-covered areas, the possibility of large-scale icing on transmission lines in winter is increasing. The icing of transmission lines usually leads to galloping accidents of ice-coated conductors and ice flashing accidents of insulators. [0003] For the ice-melting treatment of ice-covered transmission lines, DC ice-melting devices are currently used. In order to ensure that the DC voltage during the ice-melting operation does not affect the AC equipment and ensure the safety of the AC equipment, it is necessary to isolate the AC equipment and the DC ice-melting device during the ice-melting op...

AI Technical Summary

Problems solved by technology

In the process of dismantling and restoring the connecting wires, the transmission line must be turned into an overhaul state; and, because the terminal board of the equipment is relatively high from the ground, especially for AC UHV equipment, the height of the connecting wires from the ground is greater than 10m, and artificial The operation must be done with the help of mechanical tools, there is bound to be a risk of working at heights, and the operation is time-consuming and intensive

According to the actual statistics on the ice melting site of the converter station or substation, the operation time for removing the connecting wires and restoring the wiring during the ice melting is not less than 2 hours, which greatly affects the efficiency of the ice melting operation

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