JPS5864786A - 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 relates to a lightning arrester that prevents the insulation of an electrical circuit from being destroyed by discharging abnormally high voltage generated in an electrical circuit due to a lightning strike to the ground, and in particular, This invention relates to a lightning arrester equipped with a disconnector.

The conventionally known lightning arrester l is shown in Fig. 1.
The insulating case // houses a characteristic element made of silicon carbide, zinc oxide, etc. and having nonlinear voltage-current characteristics, or a built-in component 12 such as a gap device, and the built-in component 12 and the electricity to be protected. Terminals for connection to circuit and ground/3. /# are provided above and below the insulating case l/. The insulating case 11 is generally made of porcelain, and if necessary, pleats are formed on its outer peripheral surface to improve insulation performance. 15 is a mounting bracket.

The lightning arrester I with the above configuration has a built-in characteristic element that has non-linearity between the voltage V and the current as shown in Figure 2, and when the voltage V rises above a predetermined value, the current changes. The voltage V is increased rapidly to suppress the voltage V to a predetermined value or less. Such lightning arrester/
As shown in Figure 3, the electric circuit is connected between the electric circuit and the ground 3, and discharges abnormal high voltage charges generated in the electric circuit by lightning to the ground 3, causing dielectric breakdown of the electric circuit. However, due to the necessity of inspection and testing, a disconnector is normally connected in series on the electric circuit side, as shown in FIG.

As shown in Fig. 1, the disconnector DA has a blade that is rotatably supported around a hinge element 1, and a part of the blade that approaches and separates from the hinge element 1 at a predetermined distance. Terminals IIa and 24Ib are connected to the clip element 3, the clip element 23, and the hinge element 1, respectively, for electrical opening and closing.

The hinge element-11 is composed of support insulators, TA, and J, which are interposed between the clip element 3 and the base 2. In addition, the dashed line indicates that the blade here is the clip element 3.
This shows a state in which the poles are open.

As described above, this conventional lightning arrester is used by connecting a separately configured lightning arrester and a disconnector in series, so it is expensive, requires a large amount of space to install, and has poor installation workability. There was a problem.

In view of the above points, it is an object of the present invention to provide a lightning arrester that solves the above-mentioned conventional problems by configuring a lightning arrester and a disconnector into one assembly.

The present invention will be explained below with reference to embodiments shown in the drawings.

Figure S shows one embodiment of the present invention, and the lightning arrester part 3 is an insulating case that houses characteristic elements and built-in items such as a gap device if necessary, similar to the conventional lightning arrester shown in Figure 1. Terminals provided above and below the cover and insulating case 31! 3,! ;'I is equipped with a new circuit unit base, which is fixed inside the insulating case si and is a built-in part! Hinge element 41 connected to terminal j3 drawn out from 2. A blade 6 pivotally supported on the hinge element 6/, a clip element 63 that approaches and separates the blade 6 at a predetermined distance from the hinge element 6/, a terminal 641 for connecting the clip element 63 to an electric circuit. It consists of a support insulator 63 that insulates and supports the clip element 63. The lightning arrester section S and the disconnector section 6 are integrally fixed to the base 7a.

Here, the insulating case of the lightning arrester part 5 is made of porcelain or resin, the hinge element of the disconnector part 6, the blade 6, the terminal 6, etc. are made of copper or brass, and the clip element 6 is made of copper or brass.
It is preferable that the blade 3 be made of elastic material such as spring steel or a phosphor bronze plate which itself has elasticity in order to make the blade 6 come into elastic contact with the blade 6 under pressure. Support insulator 6
S is made of porcelain or resin.

In the lightning arrester configured as described above, the terminal 641 is connected to the electric circuit with a cable, etc., and the terminal 641 is connected to the built-in component through the clip element 63, the blade 6, and the hinge element 61, and is further connected to the ground from the terminal S. installed and used. A lightning arrester that integrates a lightning arrester and a disconnector in this way is
It would be a travesty to suppress abnormally high voltage in the lightning arrester section 3, but during inspections and tests, the blades 6 can be rotated and opened to disconnect, so it is not necessary to use separate lightning arresters as in the past. It will operate in the same way as if it were connected in series with the disconnector. However, compared to the conventional one, the supporting insulator on the hinge side of the disconnector is replaced by the insulating case of the lightning arrester, making it cheaper. Furthermore, the integrated structure of the lightning arrester and disconnector reduces the installation space and greatly simplifies the installation process.

FIG. 6 shows another embodiment of the invention, in which the insulating case 3
1 and the support insulator 6S are connected to the blade 6 from the base 7b side.
They are arranged in a V-shape that widens in two directions. The configuration of each other part is the same as that of the first embodiment above, so
The explanation will be omitted.

This embodiment has the effect that the installation space can be further reduced than that shown in FIG. 3.

[Brief explanation of the drawing]

Figure 1 is an elevational view of a conventional lightning arrester, Figure 2 is a characteristic line diagram of characteristic elements, Figure 3 is a wiring diagram of a lightning arrester, Figure D is an elevational view of a disconnector, and Figure 5. 6 is an elevational view of one embodiment of the present invention, and FIG. 6 is an elevational view of another embodiment. In each figure, the same reference numerals indicate the same or corresponding parts. ri: Surge arrester section, 31: Insulation case, ! Koni internals, s3
．． tlI: terminal, 6: disconnector section, 61: hinge element, 6
K: Blade, 63: Clip element, 64I: Terminal, 6
5: Support? b: Base O Agent Shin Kuzuno - Figure 3 Flame 1 Figure F Figure 4 Figure 5

Claims (1)

[Claims] (1) A support insulator having a blade having one end pivoted to a hinge element provided at one end of an insulating case that houses built-in items such as non-linear characteristic elements, and a clip element at one end with which the blade approaches and separates; A lightning arrester comprising the insulating case and a single base that fixedly supports the other ends of each of the support insulators. (g) The lightning arrester according to claim 1, wherein the insulating case and the support insulator are arranged in a V-shape that widens from the base side toward the blade.