JPS602007A - Gas breaker with arrester - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a gas circuit breaker with a surge arrester, in particular, a high-pressure sulfur hexafluoride (SF4) in a metal pressure vessel grounded for each phase.
) A gas-filled circuit breaker and lightning arrester (hereinafter simply referred to as a tank-type SFz gas circuit breaker and a tank-type lightning arrester), and a bushing for electrically connecting both poles of the tank-type SFz and gas circuit breaker to the outside. It is related to the layout structure.

An example of the structure of a conventional device of this type is shown in FIGS. 1 to 3 of the accompanying drawings. Note that FIG. 1 is a single line diagram, FIG. 2 is a front view, and FIG. 3 is a plan view thereof, showing only the /phase components.

That is, in the figure, tank type SFt, gas circuit breaker/
Both poles are provided with bushings q and bushings for external extraction via current transformers 2 and 3, respectively, and one of the above two poles is equipped with a tank-type lightning arrester for protection of the power transmission a or transformer, etc. 6 are connected and installed, and these form 7 sets of switchgears.

In such a device, a tank-type SFt gas circuit breaker / insulated for each phase is installed horizontally, and a bushing is placed vertically from one pole via a current transformer. There is. In addition, the other one pole is equipped with a tank type SFA.
Extend the connection busbar in the axial direction of the tank of the gas circuit breaker I in the opposite direction to the bushing Hiroshi, connect the bushing 3 and the tank type lightning arrester B via the current transformer 3, and store the branch busbar for this purpose. The branch tank 7 is tank type S.
F. It is connected to the tank of the gas circuit breaker L, and 1.: A bushing S is connected to the vertically upper part of the branch tank 7, and the bushing S has a distance between the poles of the bushing and the necessary bushing spacing L/. It is arranged as follows.

Furthermore, a vertical tank-type lightning arrester A is connected and provided on the axial extension of the tan-type SF and gas circuit breaker/of the branch tank 7 and on the opposite side of the tank-type SF and gas circuit breaker. . In addition, the branch tank 7 and bushing S are
It is supported by a pedestal g.

As described above, the conventional arrangement of gas circuit breakers with lightning arresters is tank type SF, gas circuit breaker L with bipolar bushings.

The branch tank 7 is necessary to ensure the bushing spacing L/S, the so-called minimum interpole insulation distance, and to connect the bushing S section and the lightning arrester B.

As a result, the longitudinal dimension Lλ of the entire device becomes large, which is a drawback in gas-insulated equipment whose purpose is to reduce the size of the device. Moreover, the necessity of the branch/distributor 7 also has the disadvantage that it becomes uneconomical.

SUMMARY OF THE INVENTION The present invention aims to eliminate the drawbacks of conventional gas circuit breakers equipped with a surge arrester and to provide a gas circuit breaker equipped with a surge arrester whose overall size is reduced, particularly the longitudinal dimension. be.

To achieve this objective, the present invention provides a tank-type SF4
Bushings are arranged in a substantially vertical direction from both poles of the gas circuit breaker via current transformers, with the bushings being approximately parallel to each other with a minimum insulation distance between poles, and from one pole to the axis of the tank type SFA gas circuit breaker. The busbar is branched and extended in a direction perpendicular to the vertical direction, and a vertical tank-type lightning arrester is connected vertically.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings, which show one embodiment of the present invention. In addition, Fig. 6 and Fig. 7 are as follows.
FIG. 3 is a plan view and a side view showing only the l-phase component.

In the figure, the tank-type SF and gas circuit breaker // are installed horizontally, and from both sides, the bushings Hiroshi and S are connected vertically to each pole through current transformers λ and 3, so that the bushings Hiroshi and S are connected approximately parallel to each other. In addition, the bushings are arranged so that the distance L/ between the bushings S is the minimum insulation distance between the poles.

Further, from one pole of the tank-type SFz gas circuit breaker l, a busbar is branched and extended in the direction perpendicular to the axis of the tank-type SF, gas circuit breaker /l, and a vertical tank-type lightning arrester 12 is vertically connected to it. Install. Namely.

A mounting part is provided horizontally and at right angles to the tank of the tank-type SF gas circuit breaker//, and a tank-type lightning arrester/2 having a vertically upright arrester is connected to this, so-called bushing. A tank-type lightning arrester parallel to the
F. Directly connected to a gas circuit breaker.

Furthermore, in conventional devices, the electrical connection position of the lightning arrester was connected to the bushing side rather than the current transformer, but in the present invention, it is connected to the circuit breaker side rather than the current transformer. However, for this reason, the operating duration of the lightning arrester does not make any particular difference from the operating time of the protection relay connected to the current transformer.

With this configuration, the present invention greatly reduces the longitudinal dimension L2 of the entire device because it eliminates the need for the branch tank 7 for bushing connection as in the conventional gas circuit breaker with lightning arrester. In addition, the above-mentioned pedestal g for the branch tank is not required, so that it is possible to obtain a gas circuit breaker with a lightning arrester that is more economical than the device 2 as a whole.

[Brief explanation of the drawing]

Figure 1 is a single line diagram of a conventional gas circuit breaker with lightning arrester, Figure 2 is a schematic front configuration diagram of Figure 1, and Figure 3 is the l of Figure 1.
A plane explanatory diagram of only the phase components, Figure D is a single line diagram of an embodiment of the gas circuit breaker with lightning arrester of the present invention, Figure 5 is a schematic front configuration diagram of Figure G, and Figure 2 is a diagram of Figure S. FIG. 7 is a right side view of only the l phase in FIG. 6. /, //... Tank type SFA gas circuit breaker, λ, 3... Current transformer, F, j... Bushing +6, 12... Tank type lightning arrester, ? ... Branch tank, za... Mount for branch tank. In each figure, the same reference numerals indicate the same or corresponding parts. Agent: Masu Oiwa, 1 figure, almost 2 figures, 3 circles, 4 figures, 5 figures

Claims (1)

[Claims] A tank-type SFx gas circuit breaker with high-pressure sulfur hexafluoride (SFx) gas sealed in a grounded metal pressure vessel for each phase, and a tank-type lightning arrester gas-insulated with sulfur hexafluoride (SFg) gas. and a bushing for electrically connecting both poles of the tank type SFx gas circuit breaker to the outside. Bushings are installed almost vertically from both poles via current transformers, and are arranged almost parallel to each other with a minimum insulation distance between the poles, and one pole is connected to the above tank type. S
A gas circuit breaker with a lightning arrester, characterized in that a bus bar is branched and extended in a direction perpendicular to the axis of the Fa gas circuit breaker, and a vertical lightning arrester is provided and connected vertically.