JPS61214387A - Mounting construction of arc-extinguishing chamber for continuous current breaker for distribution line - 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] [Industrial Field of Application] The present invention provides an arc extinguishing chamber in a follow-on circuit breaker that cuts off the follow-on flow of a lightning surge when a power distribution line is struck by lightning. The distance between the discharge section and the discharge section can be adjusted according to the voltage level of the current flowing through the distribution line.

[Prior Art] Conventionally, as seen in Japanese Patent Publication No. 56-6638, for example, a current collecting section and a discharging section are provided in a distribution line at a predetermined distance from a pin insulator, and a discharging section and a discharging section are provided at a predetermined distance. A sensing body is removably attached to an arc horn opposite to the arc horn, and the lightning surge is passed through the sensing body, causing flashover, which causes the generated high pressure to cause the sensing body to separate from the arc horn.
Methods of blocking follow-on current are known. However, with such conventional means, the distance between the discharge part and the sensing element is constant, so depending on the voltage of the distribution line, it may not be possible to completely extinguish the arc. There are some things you don't get.

[Object of the Invention] The present invention provides an arrangement in which an arc extinguishing chamber is attached and fixed to the arc horn in place of a conventional sensing body attached to the arc horn, and the arc extinguishing chamber is movable up and down together with the arc horn.
By raising and lowering it according to the voltage level of the line, it is possible to always optimally adjust the distance to the discharge part and completely block the following current.

[Structure of the Invention] An arc extinguishing chamber is mounted and fixed to an arcing horn that is provided on a utility pole at a predetermined distance from a pin insulator and is installed opposite to a discharge section provided on a power distribution line, and an arm that is fixed to the utility pole together with the arcing horn. The arc-extinguishing chamber is mounted so that it can move up and down, and the distance between the discharge section and the arc-extinguishing chamber can be freely adjusted depending on the voltage of the distribution line.

[Embodiment] In the figure, reference numeral 1 denotes a power distribution line held by a pin insulator 2, and the pin insulator 2 is fixed to a arm 3 with an insulator fixture 4 together with a metal arc horn support plate 5. A grounding wire 6 is extended from the insulator fixture 4 and buried in the ground G.

7 is a collecting/discharging fitting attached to the power distribution line l.

Consisting of a current collecting part 8 and a discharging part 9, each having a needle shape, the current collecting part 8 is beamed to the distribution line 1 with the discharging part 9 facing downward at a predetermined distance from the pin insulator 2. It is placed on its side and brought into contact with the conductor, and in this state is fixed to the distribution line l with a band 10, and further covered with a protective cover 11. This protective cover 11 has a short cylindrical part 13 projecting from the lower side of a cylindrical body 12 to be attached to the distribution line 1, which surrounds the discharge part 9, and a lower side of the cylindrical body 12 extending vertically across the second short cylindrical part 13. is divided into two in the longitudinal direction so as to be openable and closable, and engaging pieces 14.14 are provided on the left and right sides of the short cylindrical portion 13, respectively.
The installation is fixed by making them face each other.

15 is a metal arc horn;
An adjustment rod 16 of a predetermined length extends from the lower end of the rod 5.

A threaded portion 17 is provided at the lower part of the adjustment rod 16, and an upper nut 18a is screwed into this threaded portion 17. and.

The adjustment rod 16 is inserted from the lower end of the threaded portion 17 into the through hole 19 provided in the arc horn support plate 5, and is screwed onto the lower nut 18b from the lower end and tightened, thereby allowing the arc horn support plate 5 to be fixed with the upper and lower nuts 18a and 18b. Clamp and secure. By moving the upper and lower nuts 18a and 18b, which hold the arc horn support plate 5, up and down, the height position of the arc horn 15 can be changed up and down.

20 (±) It is an arc extinguishing chamber formed of an insulating covered cylinder that is fixed to the upper part of the arc horn 15, and the installation is fixed by fitting the mounting cylinder part 21 extending to the lower part onto the arc horn 15. The arc extinguishing chamber 20 has a microhole 22 in its lid, into which an arc extinguisher 23 is loaded, and a space 24 in the center of the arc extinguisher 23 that reaches the arc horn 15 from the microhole 22 .

In the follow-current circuit breaker configured in this way, when there is a lightning strike on the distribution line 1, the lightning surge travels through the distribution line 1, and the electric charge is transferred from the current collection section 8, which is most likely to short-circuit to the ground G, to the discharge section 9. Then, it is attracted to the arc extinguishing chamber 20 through the microhole 22.

The arc-extinguishing agent 23 generates heat in the space 24 to generate gas, and this gas fills the space 24 to block the follow-on flow of lightning surges, matching the voltage of the current flowing through the distribution line 1.
For example, if the voltage is low, the discharge part 9 and the arc horn 1
5, the lower end of the adjustment rod 16 is tightened with the upper and lower nuts 18a and 18b.On the other hand, if the voltage is high, the adjustment rod 16 should be pulled downward. By fixing the discharge part 9 and the arc horn 15, the distance between the discharge part 9 and the arc horn 15 is increased, and the distance between the discharge part 9 and the arc extinguishing chamber 20 is adjusted to a voltage of, for example, 3,000 volts to 30,000 volts. The spacing can always be optimally adjusted as specified.

[Effects of the Invention] As described above, the mounting structure of the arc extinguishing chamber in the follow-up circuit breaker for distribution lines of the present invention supports the arc extinguishing chamber fixedly installed on the upper part of the arc horn so as to be movable up and down.

By always optimally adjusting the distance between the arc extinguishing chamber and the discharge section provided on the distribution line according to the voltage, it is possible to always and reliably block the follow-on flow of lightning surges.

[Brief explanation of the drawing]

The figures relate to an embodiment of the present invention; FIG. 1 is a perspective view of the device in use, and FIG. 2 is an enlarged side view of the main part. 1... Distribution line, 2... Pin insulator, 3... Bracelet. 9...discharge part, 15...arc horn, 16...
...adjustment rod, 20...arc extinguishing chamber.

Claims (1)

[Claims] The arc extinguishing chamber is attached and fixed to the arcing horn, which is installed on the utility pole at a predetermined distance from the pin insulator and is installed opposite to the discharge section provided on the distribution line, and can be moved up and down along with the arcing horn relative to the arm that is fixed to the utility pole. A mounting structure for an arc extinguishing chamber in a follow-up circuit breaker for a power distribution line, characterized in that the distance between the discharge part and the arc extinguishing chamber can be freely adjusted according to the voltage of the distribution line.