JPS60200481A - 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 [Technical Field of the Invention] The present invention relates to improvements in lightning arresters installed on power transmission line towers to protect power transmission line suspension insulators and the like from snow damage.

[Technical background of the invention and its problems]

The conventional method of using lightning arresters is as a transformer installed for generating and changing load.
They protect circuit breakers, motors, generators, etc. from abnormal voltages, and single-column structures were the mainstream due to reasons such as reducing installation space.

On the other hand, when protecting suspended insulators from snow damage, which is the object of the present invention, for example, the length of the suspension insulators and the method of installation may make it impossible to coordinate the length of the arrester with the dimensions of the suspension insulators. There is a risk.

The length of the suspension insulator chain varies depending on the degree of pollution and withstand voltage, but especially in lightly polluted areas, the internal element length of the arrester exceeds the length of the suspension insulator chain, making it extremely difficult to install the surge arrester. It's coming.

On the other hand, in the event that a lightning arrester fails due to an unexpected situation and a ground fault occurs, the ability to separate the faulty arrester from the grid and retransmit power has created a new problem that must be solved.

[Purpose of the invention]

The present invention has been made in consideration of the above two points, and its purpose is to provide a lightning arrester that quickly isolates the surge arrester in the event of an abnormality and enables retransmission of power.

[Summary of the invention]

In order to achieve this object, according to the present invention, a plurality of lightning arrester units are connected in series through a connection part to form a series of lightning arrester units, and a lightning arrester unit is connected at one of these connection parts. The F series is formed so that it is bent, and a disconnection part is provided at one of the connection parts, and the lightning arrester unit series is arranged between the tower and the power transmission line in parallel with the insulating support member series. This feature makes it possible to quickly retransmit power for 1111 L in the event of an abnormality.

Furthermore, it is preferable to form the lightning arrester unit series into an L-shape.

Furthermore, it is preferable that the separation portion be formed by an exploding member that explodes and separates due to a fault current, or a fusing member that melts and breaks due to a fault current.

[Embodiments of the invention]

An embodiment of the lightning arrester of the present invention will be described below with reference to FIGS. 1 and 2. In FIG. 1, an arm 2 is extended from a steel tower J, and from this arm 2 a power transmission line 5 is supported by an insulating support member series, in the illustrated example, a suspension insulator series 3, which is a series of insulating support members connected to a plurality of suspended insulators or long pipe insulators. This suspension insulator series 3
A lightning arrester unit series 6 is installed as a lightning arrester so that it is electrically parallel to the lightning arrester. The lightning arrester unit series 6 is constructed by connecting in series a plurality of lightning arrester units 6-1, 6-2 which are divided into two in the figure. This lightning arrester j) is 6-1.6-2
Although not shown, the internal elements are housed inside a tube, and lids are attached to both ends of the tube, and connecting fittings are attached to the lids.

In FIG. 2, the lightning arrester unit series 6 is the lightning arrester unit 6-1.
6-2 is connected between the arm 2 of the steel tower 1 and the power transmission line 5. Also, one side of the lightning arrester unit 6-1 is fixed to the arm 2, and the other side is connected to the one side of the lightning arrester unit 6-2 via a rotating part 7 that serves as a connection part, and the other side is Power transmission line 5
connected to. In this way, the lightning arrester unit chain 6 is bent at the rotating part 7, which is a connecting part, to form an L-shape. This rotating part 7 connects the mounting brackets of both lightning arresters q1, 6-1 and 6-2, for example, through bolts or the like, and the surface mounting brackets are rotatable. Further, the explosive member 8 is constructed so that the built-in explosives explode due to the fault current when the lightning arrester unit 6 has an accident, and the explosive member 8 is destroyed.

Next, the effects of the present invention will be explained. Since the lightning arrester unit series 6 is connected in parallel with the suspension insulator series 3, and the lightning arrester unit series 6 is arranged in a - shape, the overall length of the lightning arrester can be made sufficiently longer than the dimensions of the suspension insulator series 3.

On the other hand, if the lightning arrester experiences a ground fault due to an unexpected situation, the explosive member 8 installed between the power transmission line 5 and the arrester unit 6-2 will cause the built-in explosives to explode due to the ground fault current.
Since this blasting member 8 is destroyed, the 4-surge arrester unit 6-2 is swung in the direction of the arrow at the position shown by the dotted line around the rotating part 7 and is separated from the end of the surge arrester unit 6-2 and the power transmission line 5. Sufficient insulation distance can be maintained between the

When the end of the lightning arrester unit 6-2 moves due to the destruction and cutting of the blasting member 8, it is necessary to move the required distance within the required time. During this movement, based on the principle of a pendulum, the size increases in proportion to the square root of the total length of the moving part of the arrester, but the number of units of the arrester unit 6
If a single lightning arrester is used instead of forming the lightning arrester in an L-shape, the moving time will be longer, and the necessary separation distance can be achieved within the re-closing time of the circuit breaker (not shown) connected to the power transmission line 5.

However, when the lightning arrester unit 6-2 is formed in an L-shape as in the present invention, the separated lightning arrester unit 6-2 is short, so the moving time is shortened, and the required separation distance can be achieved within the required time.

That is, as mentioned above, the lightning arrester unit series 6 can be arranged in an L-shape in parallel with, for example, the suspension insulator series 3, and since the disconnection section can be disconnected in an unexpected situation, the disconnection time can be shortened, so that it is not necessary to re-energize. This has the advantage that it does not interfere with

Next, another embodiment of the present invention will be described with reference to FIGS. 3 to 6. The same parts as in FIGS. 1 and 2 are given the same reference numerals. In FIG. 3, the lightning arrester unit chain 6 includes a lightning arrester unit 6-1 whose one end is fixed to the arm 2, a lightning arrester unit 6-2 whose other end is connected to the arm 2 via a rotating part 7, A lightning arrester unit 6-3 is connected to the lightning arrester unit 6-3 via the blasting member 8 as a separation part, and the power transmission line 5 is connected to the lightning arrester unit 6-3.

This lightning arrester unit chain 6 is also bent at the rotating part 7 to form an L-shape Iz, and is connected between the power transmission line 5 and the arm 2 in parallel with the suspension insulator chain 3.

If the explosive member 8 is destroyed by the fault current during an accident,
The arrester units 6-2 and 6-3 each open, swing to the position indicated by the dotted line, and then stop. In this way, the explosive member 8
The time it takes for both to break down and open is short, meaning that a sufficient insulation distance can be achieved in a short period of time. Furthermore, since one end of the lightning arrester 6-1 is fixed to the arm 2 at a position sufficiently away from the power transmission line 5, the time for disconnection, that is, the time for establishing an effective insulation distance, is shorter than in the embodiment of the present invention. The power transmission line 5 can be reinserted even more easily.

In FIG. 4, the lightning arrester 11 is connected between the power transmission line 5 and the power transmission line 6-2 by a fusing member 9. This fusing member 9 is selected to be fairly strong, for example twisted copper wire, and to be blown out by a fault current. When the fusing member 9 melts due to this fault current, the lightning arrester unit 6-2 swings around the rotating member 7 to maintain an insulation distance. At this time as well, it opens faster than the embodiment of the present invention.

In FIG. 5, the lightning arrester 111 6-1, which is attached to the arm 2 of the steel tower 1 with one end fixed, is connected to one end of the lightning arrester unit 6-2 via the rotating part 7, and the other end is connected to the fusing member. A lightning arrester unit series 6 is connected to the power transmission line 5 via a cable 9 and electrically parallel to the suspension insulator series 3. This lightning arrester unit series 6 is bent at the rotating portion 7 to form an L-shape. And, in the vicinity of the rotating part 7 attached to the lightning arrester unit 6-1, the lightning arrester-7=! When l'L position 6-2 opens, this arrester unit 6-2
A vibration prevention member 10 is attached which serves as a damper or a seat bar to stop vibrations. Therefore, in the event of an accident, the fault current may cause the 8-force tube to break in the fuser member, causing the lightning arrester 1 to be cut off.
When one end of the 11th position 6-2 is separated and swings open around the rotating part 7, the vibration prevention member 1
0, the vibrations are absorbed or captured and the vibrations of the arrester unit 6-2 are prevented. As described above, since vibrations can be suppressed compared to the embodiments of the present invention, reliability can be further improved.

In FIG. 6, a lightning arrester unit 6-1 has one end attached to the arm 2 of the steel tower 1, and a lightning arrester unit 6-2 is connected to the other end of the lightning arrester unit 6-2 via a connecting portion 11. The lightning arrester unit 6-2 is connected to the lightning arrester unit 6-3 via the blasting member 8, and the lightning arrester unit 6-3 is connected to the power transmission line 5, so that the lightning arrester unit 6-2 is electrically connected to the suspension insulator unit 3. is formed by connecting them in parallel.

This lightning arrester unit series 6 is formed by being bent at the location of the blasting member 8. Also, if the blasting member 8 is blown up by the fault current and this part is separated, the lightning arrester unit 6-1.6-2
and avoidance 8- electric appliances j11. Since the position 6-3 opens left and right, the lightning arrester (11
Since the end of the power line 6-2 and the end of the lightning arrester 111 position 6-3 are separated quickly, there is an advantage that it is easier to reinsert the power transmission line 5.

Although the suspension insulator series has been described above as the insulating support member series, it goes without saying that a long pipe insulator series or a combination of suspension insulators and long pipe insulators may also be used.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to install even when the overall length of the lightning arrester series R114 is longer than the insulating support member series, and in the event of an abnormality such as an accident, one of the connecting parts of the lightning arrester series can be quickly removed. By separating the lightning arrester units, the lightning arrester unit series can be separated in a short time and an insulation distance from the power transmission line can be secured, so that it is possible to provide a lightning arrester that can be reinserted.

[Brief explanation of the drawing]

FIG. 1 is a front view of the lightning arrester of the present invention, FIG. 2 is an enlarged front view of the main part of FIG. 1, and FIGS. 3 to 6 are front views showing main parts of other embodiments of the invention, respectively. It is. ]... Steel tower, 2... Arm, 3... Suspension insulator chain, 5
...Power transmission line, 6...Surge arrester unit chain, 6-++6-z flow 3...Surge arrester 111th place, 7...
Rotating part, butt/explosive member, 9... fusing member. 10... Vibration prevention member, IJ... Connection part. Agent Patent Attorney Ii 2 - Male 11 - Figure 1

Claims (4)

[Claims] (1) In a lightning arrester installed to protect an insulating support member chain that supports a power transmission line from a steel tower from snow damage, a plurality of lightning arrester units are connected in series via a connection part to form a lightning arrester unit chain, and , the lightning arrester unit series is formed so as to be bent at one of these connection parts, and a disconnection part is provided at one of the connection parts, and the lightning arrester I
A lightning arrester characterized in that a B series is installed between a steel tower and a power transmission line. (2) The lightning arrester according to claim 1, wherein the lightning arrester unit series is formed in an L shape. (3) Claim 1 in which the disconnection portion is formed by an explosive member that explodes and disconnects due to an accidental current.
Lightning arrester as described in section. (4) The lightning arrester according to claim 1, wherein the disconnection portion is formed by a melting member that melts due to an accident current.