JPH0779522A - Method for mounting arrester on pole - Google Patents

Abstract

PURPOSE:To provide a method for mounting an arrester on a pole in which the bursting direction of arrester can be prescribed uniformly for each phase on standard poles I, II. CONSTITUTION:In the method for mounting a lead oxide arrester 10 while fixing to an arm 6 such that the lines 1, 2, 3 of respective phases are arranged horizontally, ejection port 22a of the arrester 10 is directed toward a pole 5 so that gas is ejected toward the arm 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of mounting a lightning arrester, in which a zinc oxide type lightning arrester is attached to a wire arm of a utility pole.

[0002]

2. Description of the Related Art FIG. 6 is a sectional view showing a lightning arrester attached to a wire arm of a utility pole disclosed in, for example, Japanese Patent Laid-Open No. 5-29061. In the figure, 1 is a single-phase line for overhead power distribution, 6 is a arm attached to a utility pole, which will be described later, 10 is a lightning arrester in an assembled state, 11 is a zinc oxide element having a non-linear characteristic and a high dielectric constant, 12 is an insulating container in which the zinc oxide element 11 is housed in a cylindrical internal space, 13 is a metal fitting on the power-supply side attached to the upper end of the insulating container 12, 13a is an arc horn of the metal fitting 13 on the power supply side, and 14 is the power-supply side. Cement for fixing the metal fitting 13 to the insulating container 12, 15 is a metal lid for housing and sealing the zinc oxide element 11 in the internal space of the insulating container 12, which is in conductive contact with the zinc oxide element 11.
16 is a connection wire for conductively connecting the metal lid 15 and the power-supply-side metal fitting 13;
Reference numeral 17 denotes a conductor that is in conductive contact with the zinc oxide element 11, and the upper end portion that is in conductive contact has a disk shape. 18 is a ground side metal fitting attached to the lower end of the insulating container 12, 19 is cement for fixing the ground side metal fitting 18 to the insulating container 12, 21 is a lower end portion of the conductor 17 fixed by the insulating container 12 and the ground side metal fitting 18. Is conductively contacted with, a reference numeral 22 is an insulator cover that surrounds the power supply side metal fitting 13, and a ruptured portion of the insulator cover 22 is a thin portion 22a. Reference numeral 23 is a rubber cover attached to the grounding side metal fitting 18.

FIG. 7 is a perspective view showing a method of mounting a lightning arrester called standard mounting pole I. Arms 6 and arm ties 7 are attached to electric poles 5 to make lines 1, 2 and 3 of each phase horizontal. Arranged, the lightning arrester 10 is attached to the arm 6 and the line 1 of each phase
It is connected to 2 and 3 and is insulated and supported. In this standard pole I, since the electric pole 5 is located between the medium-phase line 1 and the inner-phase line 3, the distance between the lines 1, 2, and 3 of each phase is relatively large, which is 850 mm in one example. Next, Fig. 8 shows standard equipment II
FIG. 3 is a side view showing a method of mounting a lightning arrester, which is referred to as a “lightning protection device”.
And the lines 1, 2, and 3 of each phase are arranged horizontally.
In this standard pole II, the lines 1, 2,
Since there are three, the distance between the lines 1, 2, and 3 of each phase is small, which is 425 mm, compared to 850 mm in the case of the standard mounting column I.

In a zinc oxide type lightning arrester 10 constructed as shown in FIG. 6, a zinc oxide element 11 is housed in an inner space of an insulating container 12 and is pressed by a metal lid 15 to make conductive contact with the zinc oxide element 11, and The space is filled with air or nitrogen gas, and the metal lid 15 is adhered and sealed to the upper end surface of the insulating container 12. Zinc oxide element 11
Is connected to the line 1 via the metal lid 15, the connecting wire 16 and the power-supply-side metal fitting 13, and is also connected to the arm 6 via the conductor 17 and the pin 19 and is grounded. If the zinc oxide element 11 breaks down, an electric current will flow to the arm 6 that is grounded by generating an arc on its surface, and the insulating container
The gas in the 12 internal spaces is heated by the arc and expands rapidly. As a result, the metal lid 15 is broken and the gas is covered by the insulator cover 22.
Insulation cover 22 due to pressure rise there
The rupture part 22a of the ruptures and becomes an ejection port and instantly ejects to the outside (indicated by a broken line arrow in FIG. 6). The arm member 6 extends in the direction of ejection of the ionized gas, and the rupture portion 22a of the insulator cover 22 is ruptured to expose the arc horn 13a of the power supply side metal fitting 13. Therefore, the arc horn 13a and the arm member 13 An external arc is generated by flashing between 6's. As a result, the arc on the surface of the zinc oxide element 11 is extinguished, so that the insulating container 2 does not explode and break, and fragments are not scattered. It should be noted that since a fold between the arc horn 13a and the upper end of the grounding side metal fitting 18 causes an external arc, the folds of the insulating container 12 may be damaged. To prevent the grounding side metal fitting 18 from becoming an arc spot.

When the lightning arrester 10 is mounted as a pillar, the rupture portion 22a of the insulator cover 22 which serves as the ejection port of the ionized gas must always face the arm 6 and the standard pillar I Then, the burst part 22a of the lightning arrester 10 of the middle phase may be in any direction as long as it faces the arm 6, but the lightning arrester of the outer phase and the inner phase
For 10 it is necessary to turn the ruptured portion 22a inward. Further, the burst portion 22a of the lightning arrester 10 of the middle phase and the burst portion 22a of the lightning arrester 10 of the outer phase or the inner phase face each other, and both of the lightning arresters 10
Emits ionized gas at the same time, and even if an external arc occurs due to a flashover between the arc horn 13a and the armrest 6, in the case of the standard column I, the lines 1, 2, 3 of each phase are Since the intervals are relatively large and the external arcs are not close to each other, the external arcs are not connected to each other to cause an interphase short circuit.
Next, since the spacing between the lines 1, 2 and 3 of each phase is small in the standard mounting column II, for example, in the same manner as in the standard mounting column I, for example, the burst portion 22a of the lightning arrester 10 of the middle phase and the outer phase faces each other, When both of the arresters 10 eject the ionized gas at the same time, and the arc horn 13a and the arm 8 are flashed to generate an external arc, the external arcs are close to each other and are connected to one another. This can lead to an interphase short circuit (see FIG. 8).
Therefore, the lightning arrester 10 of each phase has different flashover characteristics due to the failure of the zinc oxide element 11.

[0006]

As described above, in the method of mounting the lightning arrester, since the rupture portion 22a of the lightning arrester 10 of each phase must be directed toward the arms 6 and 8, the standard pillar I
Then, the rupture portion 22a of the lightning arrester 10 of the outer phase and the inner phase are both directed inward, and the rupture portion 22a of the lightning arrester 10 of the middle phase is faced with that of the outer phase or the inner phase, and there are two methods. Further, in the case of the standard mounting pillar II, if the same as the standard mounting pillar I, the external arcs may be connected to one when the lightning arresters 10 of the adjacent phases simultaneously generate the external arcs.
The ruptured portion 22a of the lightning arrester 10 of each phase is directed toward the utility pole 5 side, and the ruptured portion of the lightning arrester 10 of each phase by the standard mounting columns I and II.
There was a problem that the orientation of 22a was different and could not be specified uniformly.

The present invention has been made in order to solve the above problems, and the direction of the rupture portion of the lightning arrester of each phase can be uniformly defined by the standard mounting columns I and II. Provided is a method of mounting a lightning arrester, and further, the display item displayed on the surface of this lightning arrester is not affected by an external arc, or is not indistinguishable even if affected by an external arc. It is an object to provide a lightning protection device.

[0008]

According to the method of mounting a lightning arrester according to the present invention, a zinc oxide element is housed in a cylindrical inner space of an insulating container and sealed with a lid, and both ends of the zinc oxide element are insulated from each other. Conductive connection between the power-supply side metal fittings and the ground-side metal fittings attached to both ends of the power-supply side metal fitting, and the power-supply-side metal fittings to the one-phase line The arc in the inside suddenly expands the gas in the internal space, breaks the lid, and attaches a lightning arrester that spouts the released gas from the spout of the cover attached to the insulating container to the arm, and the line of each phase is horizontal. In the columnar method of the lightning arrester having the array, the gas ejected from the lightning arrester attached to the arm is directed toward the arm, and the gas is blown toward the arm, and the outlet is directed toward the electric pole of the arm. . In addition, in this lightning protection device, when viewed from above, a display item is displayed at a predetermined position on the surface opposite to the ejection port. Further, in this lightning protection device, when viewed from above, display items are displayed at two predetermined places on the surface perpendicular to the jet port.

[0009]

In the present invention, since the jet of the lightning arrester attached to the armrest is directed toward the armrest and the jet is directed toward the utility pole side of the armrest, the spout of the lightning arrester of each phase is provided by the standard mounting columns I and II. The orientation will be uniform. Further, since the display item is displayed at a predetermined position on the surface opposite to the jet port when the lightning arrester is viewed from above, it is not affected by the external arc. Further, since the display item is displayed at two predetermined positions on the surface orthogonal to the ejection port when the lightning arrester is viewed from above, at least one of the display items is not indistinguishable even when affected by an external arc.

[0010]

【Example】

Example 1. FIG. 1 is a plan view (A) and a side view (B) showing an example of a standard column I according to the present invention. Since all the reference numerals in the figure have been described in FIGS. 6 and 7, the description thereof will be omitted here. When the lightning arrester 10 is mounted, the burst portion 22a of the insulator cover 22 which serves as a jet port of the ionized gas is sprayed toward the arm 6 and the burst gas 22 is sprayed onto the arm 6. Install the lightning arrester 10 under the rule of facing the utility pole 5 side.
Since it is attached to the external phase and the internal phase, the lightning arrester 10
The lightning arrester 10 of the middle phase faces the burst portion 22a toward the burst portion 22a of the lightning arrester 10 of the inner phase. The burst parts 22a of the lightning arresters 10 of the middle phase and the inner phase face each other, but both of these lightning arresters 10 eject the ionized gas at the same time, and the arc horn 13a and the arm 6 are flashed to each other to the outside. Even if an arc is generated, the distance between the lines 1, 2, and 3 of each phase is relatively large, and the external arcs are not close to each other, so that they will not be connected to one another to cause an interphase short circuit. According to this embodiment, the lightning arrester for each phase when the zinc oxide element 11 fails
The flash characteristics of 10 are the same.

Embodiment 2. FIG. 2 is a standard mounting column according to the present invention.
It is the top view (A) and side view (B) which show the example of II. All the reference numerals in this figure have already been described in FIGS. 6 and 8. Standard Pillar
Even in II, the burst portion 22a of the insulator cover 22 which is a jet of the ionized gas is blown toward the arm 8 to spray the gas onto the arm 8, and the burst 22a is placed on the side of the arm 8 toward the utility pole 5. Since the lightning arrester 10 is attached to the arm 8 according to the regulation to be directed, all the lightning arresters 10 of each phase face the burst portion 22a toward the utility pole 5. Therefore, even if the distance between the lines 1, 2 and 3 of each phase is small, the external arc is not connected to one and short-circuiting between phases does not occur, and the flash of the lightning arrester 10 of each phase when the zinc oxide element 11 fails. The fault characteristics are the same.

Embodiment 3. FIG. 3 is a plan view showing another invention related to the invention described above with reference to an example of a standard mounting column I, in which a zinc oxide element 11 of a medium-phase lightning arrester 10 has failed and an external arc has occurred. (A) and side view (B). When the ionized gas is ejected from the rupture portion 22a of the medium-phase lightning arrester 10 to generate an external arc, the external arc is generated by the medium-phase line 1.
Middle-phase lightning arrester receiving electromagnetic force by magnetic field of current flowing in
The load side (the upper side is the power supply side and the lower side is the load side in FIG. 3 (A)). At that time, since the surface of the insulating container 12 may be damaged or the grounding side metal 18 may be melted, the lightning protection device may be used.
It is necessary to prevent the manufacturer's name, trademark, rating, identification mark, and other markings 31 displayed on the surface of 10 from being affected by an external arc. FIG. 4 is a plan view showing a portion where the display item 31 of the lightning protection device 10 is displayed.
On the surface of, it is not affected by the external arc.

Embodiment 4. FIG. 5 is a plan view showing a display portion different from that of the third embodiment, in which both the insulating cover 22, the insulating container 12, the rubber cover 23, and the grounding side metal fitting 18 which are perpendicular to the rupture portion 22a when the lightning arrester 10 is viewed from above are shown. If the display item 31 is displayed on the surface, the display item 31 on the power supply side remains even if the display item 31 on the load side becomes indistinguishable due to the influence of the external arc, so there is no need to investigate the faulty lightning arrester 10. It does not cause any problems. It should be noted that if the display item 31 is only on the power supply side, the power supply side and the load side may be switched depending on how the power distribution system is operated, and thus there is a possibility that identification will not be possible.

[0014]

As described above, according to the present invention,
The gas ejected from the lightning arrester attached to the armor is directed toward the armor, and the gas is blown toward the armor. At the same time, the outlet is directed toward the utility pole of the armor. This has the effect of uniformly defining the direction of the rupture portion that will become the ejection port.

Further, when the lightning arrester is viewed from above, since the display item is displayed at a predetermined position on the surface opposite to the jet outlet, it is not affected by the external arc.

Further, when the lightning arrester is viewed from above, since the display items are displayed at two predetermined places on the surface perpendicular to the jet outlet, even if one is indistinguishable under the influence of an external arc, the other is displayed. It cannot be indistinguishable.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of a standard mounting column I according to the present invention.
(A) and side view (B).

FIG. 2 is a plan view showing an example of standard mounting columns II according to the present invention.
(A) and side view (B).

FIG. 3 is a plan view (A) and a side view (B) showing a state in which an external arc is generated in the medium-phase lightning arrester.

FIG. 4 is a plan view showing a portion where a display item of the lightning protection device is displayed.

5 is a plan view showing a display portion of the lightning protection device different from that in FIG. 4. FIG.

FIG. 6 is a cross-sectional view showing a lightning arrester attached to a wire arm of a utility pole.

FIG. 7 is a perspective view showing a method of mounting a standard lightning pole I lightning arrester.

FIG. 8 is a side view showing a method of mounting a standard lightning rod II lightning arrester.

[Explanation of symbols]

 1 line 2 lines 3 lines 5 pole 6 armor 8 armer 10 lightning arrester 11 zinc oxide element 12 insulating container 13 charging side metal fitting 15 metal lid 16 connecting wire 17 conductor 18 grounding side metal fitting 21 pin 22 insulator cover 22a rupture part 23 Rubber cover 31 Display items 32 Display items 33 Display items

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuyuki Fujiwara 2-4-1 Nishitsutsujigaoka, Chofu-shi Tokyo Electric Power Co., Inc.

Claims (3)

[Claims] 1. A metal fitting and a grounding side in which a zinc oxide element is housed in a cylindrical inner space of an insulating container and sealed by a lid, and both ends of the zinc oxide element are attached to both ends of the insulating container, respectively. In addition to conductively connecting to the metal fittings, the power charging side metal fittings are connected to the one-phase line, and the ground side metal fittings are conductively connected to the grounded armrest of the utility pole, and the arc generated in the zinc oxide element causes the internal space Gas is suddenly expanded and the lid is broken, and the lightning arrester that ejects the released gas from the ejection port of the cover attached to the insulating container to the outside is attached to the armband,
In a pillar method of a lightning arrester in which the lines of each phase are arranged in a horizontal arrangement, the gas ejected from the ejection port of the lightning arrester attached to the armband toward the armband is blown onto the armband, and A method of mounting a lightning arrester, characterized in that the ejection port is directed toward the utility pole of the armband. 2. The lightning arrester according to claim 1, wherein when the lightning arrester is viewed from above, a display item is displayed at a predetermined position on the surface opposite to the jet port. 3. The lightning protection device according to claim 1, wherein when the lightning protection device is viewed from above, display items are displayed at two predetermined positions on a surface perpendicular to the jet port.