Novel arc extinguishing grid type load switch suitable for C4F7N environment-friendly gas

Abstract

The invention relates to a novel arc extinguishing grid type load switch suitable for C4F7N environment-friendly gas. The load switch comprises an installation seat, wherein an arc extinguishing mechanism and a grounding contact seat are installed on the installation seat, the arc extinguishing mechanism comprises a supporting insulator, a static contact seat and an arc extinguishing chamber, thearc extinguishing chamber comprises an arc extinguishing grid frame and a plurality of arc extinguishing grid sheets installed on the arc extinguishing grid frame, the static contact seat is a right-angle plate, one right-angle side of the static contact seat is connected with the arc extinguishing grid frame, the other right-angle side of the static contact seat is connected with the supporting insulator, the supporting insulator is connected with the mounting seat, and a current blocking groove and a copper-tungsten arc contact are arranged on the right-angle side of the static contact seatconnected with the arc extinguishing grid frame. The load switch is advantaged in that the load switch is a special load switch developed for being matched with the novel environment-friendly gas C4F7N, a three-station knife type load switch is adopted, arc extinguishing gate type arc extinguishing is adopted in an arc extinguishing mode, and the requirement for the breaking capacity of the load switch in the C4F7N gas is met by adjusting the structure of the load switch.

Description

Technical field

[0001] The invention relates to the technical field of power switch equipment, in particular to a novel arc extinguishing grid type load switch suitable for C4F7N environmentally friendly gas. Background technique

[0002] Thanks to SF 6 It was designated as a greenhouse gas at the JD.com meeting in 1997 to prevent global warming and restrict emissions, prompting not to use SF 6 The birth of the gas switchgear. Because the environmentally friendly gas ring network cabinet, which is easy to expand to high voltage and large capacity, has great advantages in technology and economy, the market has a lot of 6 The demand for inflatable ring network cabinets is decreasing year by year, replacing SF 6 The environmentally friendly ring main unit of the inflatable ring main unit will become the mainstream of the market and will gradually replace the SF 6 Inflatable ring network cabinet.

[0003] Environmental protection gas C4F7N has excellent insulation performance, arc exti...

Examples

Embodiment 1

[0029] Such as figure 1 As shown, the present invention includes a mounting base 10 on which an arc extinguishing mechanism and a ground contact base 9 are installed. Such as figure 2 , 3 As shown, the arc extinguishing mechanism includes a supporting insulator 1, a static contact seat 2 and an arc extinguishing chamber, and the arc extinguishing chamber includes an arc extinguishing grid 3 and a plurality of arc extinguishing grids 5 installed on the arc extinguishing grid 3 In this embodiment, the arc extinguishing grid 3 is a semi-closed structure. The static contact base 2 is a right-angle plate, one of the right-angled sides of the static contact base 2 is connected with the arc extinguishing grid 3, the other right-angled side of the static contact base 2 is connected with the supporting insulator 1, and the supporting insulator 1 is connected with the mounting base 10. . The ground contact base 9 and the static contact base 2 form a three-station knife switch through t...

Embodiment 2

[0035] The difference between Embodiment 2 and Embodiment 1 is that the structure of the arc extinguishing grid and the arc extinguishing grid is changed, such as Figure 8 As shown, the arc extinguishing grid is a fully enclosed structure, and the arc extinguishing grid is wrapped in the arc extinguishing grid. The arc extinguishing grid is changed from a semi-closed structure to a fully enclosed structure to protect the interphase arc from breakdown and increase Insulation reliability between phases. Such as Picture 9 Therefore, the groove bottom of the arc extinguishing grid is a straight groove, the groove bottom of the arc extinguishing grid is changed from a stepped groove to a straight groove, and the size of the bottom of the arc extinguishing grid is reduced (the arc movement space size remains unchanged), so that the arc The magnetic field is more concentrated, so that the initial arc enters the arc chute smoothly under the action of the magnetic field. Due to the l...

Technical field

[0001] The invention relates to the technical field of power switch equipment, in particular to a novel arc extinguishing grid type load switch suitable for C4F7N environmentally friendly gas. Background technique

[0002] Thanks to SF 6 It was designated as a greenhouse gas at the JD.com meeting in 1997 to prevent global warming and restrict emissions, prompting not to use SF 6 The birth of the gas switchgear. Because the environmentally friendly gas ring network cabinet, which is easy to expand to high voltage and large capacity, has great advantages in technology and economy, the market has a lot of 6 The demand for inflatable ring network cabinets is decreasing year by year, replacing SF 6 The environmentally friendly ring main unit of the inflatable ring main unit will become the mainstream of the market and will gradually replace the SF 6 Inflatable ring network cabinet.

[0003] Environmental protection gas C4F7N has excellent insulation performance, arc exti...

Examples

Embodiment 1

[0029] Such as figure 1 As shown, the present invention includes a mounting base 10 on which an arc extinguishing mechanism and a ground contact base 9 are installed. Such as figure 2 , 3 As shown, the arc extinguishing mechanism includes a supporting insulator 1, a static contact seat 2 and an arc extinguishing chamber, and the arc extinguishing chamber includes an arc extinguishing grid 3 and a plurality of arc extinguishing grids 5 installed on the arc extinguishing grid 3 In this embodiment, the arc extinguishing grid 3 is a semi-closed structure. The static contact base 2 is a right-angle plate, one of the right-angled sides of the static contact base 2 is connected with the arc extinguishing grid 3, the other right-angled side of the static contact base 2 is connected with the supporting insulator 1, and the supporting insulator 1 is connected with the mounting base 10. . The ground contact base 9 and the static contact base 2 form a three-station knife switch through t...

Embodiment 2

[0035] The difference between Embodiment 2 and Embodiment 1 is that the structure of the arc extinguishing grid and the arc extinguishing grid is changed, such as Figure 8 As shown, the arc extinguishing grid is a fully enclosed structure, and the arc extinguishing grid is wrapped in the arc extinguishing grid. The arc extinguishing grid is changed from a semi-closed structure to a fully enclosed structure to protect the interphase arc from breakdown and increase Insulation reliability between phases. Such as Picture 9 Therefore, the groove bottom of the arc extinguishing grid is a straight groove, the groove bottom of the arc extinguishing grid is changed from a stepped groove to a straight groove, and the size of the bottom of the arc extinguishing grid is reduced (the arc movement space size remains unchanged), so that the arc The magnetic field is more concentrated, so that the initial arc enters the arc chute smoothly under the action of the magnetic field. Due to the l...

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