JPS62209373A - Apparatus for displaying operation and trouble of lightning insulator in thunder resistant horn insulator device - Google Patents

Abstract

PURPOSE:To make it possible to easily perform the confirmation of operation and trouble states at a point separated from a tower body, by mounting an operation display part performing display through the utilization of the explosive power of powder and a trouble display part to the tower body in an earth side. CONSTITUTION:When surge voltage due to the falling of a thunderbolt flows to a electric wire, said voltage is discharged at the air gap G between an arc horn 31 and a discharge electrode 35, and flows to a tower body through the non-linear resistor element in a lightning insulator 6, an insulating terminal 37, an earth conductor 36, a mount link mechanism 3 and a support arm 2 and earthed. A surge current is detected by a sensor 38 to be inputted to an operation displays part 43 through a cable 41 and the power thereof is ignited and a display piece is protruded by the explosive power thereof and a display strip is suspended. At each time when a thunderbolt surge current flows through the insulator 6, the display part 43 is operated and the number of times of the thunderbolt surge current flowing to the insulator 6 can be confirmed.

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) The present invention is designed to quickly discharge high voltage caused by lightning when it is applied to a power transmission line, and to ensure that the follow-up arc that occurs thereafter is prevented. The present invention relates to the operation of a lightning arrester insulator and a failure display device in a lightning horn insulator device for power transmission lines to prevent ground faults.

(Prior Art) Conventional operation display devices for lightning arresters placed on power transmission lines have used a mechanical dial counter type that is activated by lightning surge current. Furthermore, there was no special equipment for failure indication, and confirmation was made by visually observing external damage to the lightning arrester.

(Problems to be Solved by the Invention) However, since the conventional dial counter type operation display device only uses instantaneous lightning surge current to turn on, the operating energy is small and the display section cannot be made large. ,
For this reason, there was a problem in that it could not be confirmed without climbing the tower body and going to the attachment point at the tip of the arm. Furthermore, since the conventional operation display device is installed near the lightning arrester, there is a problem in that it is not possible to replace the old device with a new one while the line is live.The present invention provides a lightning-resistant horn that solves the above problems. An object of the present invention is to provide a device for indicating the operation and failure of a lightning arrester in an insulator device.

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention detects a lightning surge current flowing through a lightning arrester and a fault current that occurs when the lightning arrester fails in a lightning horn insulator device. An operation display incorporating an operating current sensor, a fault current sensor, and a gunpowder mounted on the tower body side and activated based on an operating signal or a fault signal output from the operating current sensor and the fault current sensor via cables, respectively. It consists of a fault display section and a fault display section.

(Operation) This invention operates as follows by employing the above means.

When a high voltage due to a lightning surge is applied to a power transmission line, this current is discharged from the discharge electrode on the energized side to the discharge electrode on the lightning arrester side, and from the nonlinear resistance element in the lightning arrester to the insulated terminal and the ground conductor. After that, it flows toward the tower body side and is discharged. Then, the operating current sensor detects this and an operating signal is input from the cable to the operation display section, which displays the operation of the lightning arrester. In addition, when the lightning arrester deteriorates and the follow-on current after a lightning surge current cannot be interrupted, the fault current sensor detects an abnormality, and this fault signal is sent from the cable to the fault display section, where a fault is displayed. .

(Example) Hereinafter, an example embodying the present invention will be described based on the drawings.

Schematically, the insulator device of this embodiment extends horizontally at the tip of the support arm 2 of the tower body 1, as shown in FIG.
An insulator attachment link mechanism 3 supported rotatably in the vertical direction, a hanging insulator 5 suspended from one end of the attachment link mechanism 3 to support the electric wire 4, and a hanging insulator fixed to the tip of the attachment link mechanism 3. The lightning arrester 6 is made up of a lightning arrester 6 and an operation/failure display device 7 that displays the number of times the lightning arrester 6 has operated and its failure.

Therefore, according to FIGS. 3 and 4, the mounting link mechanism 3
To explain this, a bracket 9 is tightened and fixed to the lower surface of the tip of the support arm 2 by a bolt 8, and an H-shaped hanging link 10 is attached to a shaft support 9a of the bracket 9 by a shaft 11 in a direction perpendicular to the track. It is rotatably mounted. A lower movable support arm 13 is connected to the suspension link 10 by a shaft 12, and a support frame 14 welded to the upper surface of the movable support arm 13 and a shaft support 9a of the bracket 9 are connected to the suspension link 10 by a shaft 12.
Both ends of the upper movable support arm 15 are connected by shafts 16 and 11, respectively.

A rectangular frame 18 welded to the end, and a mounting hole 19 welded to the tip of the frame 18 and into which the lightning arrester 6 is attached.
It consists of a mounting plate 19 with a. The upper movable support arm 15 has a U-shaped frame 20 connected to the shaft 11, and is fixed to the frame 20 with a nut 21 so that its position can be adjusted, and has a length connected to the shaft 16. It consists of an adjustment rod 22.

On the other hand, a right-angled clevis 23 is connected to the lower end of the suspension link 10 constituting the mounting link mechanism 3 so as to be rotatable in the direction perpendicular to the track by the shaft 12, and a shaft 24 is provided at the lower part of the right-angled clevis 23 so as to be rotatable in the direction perpendicular to the track. The hanging insulator 5 is connected by a shaft 26 so as to be rotatable in the track direction via a horn mounting bracket 25 which is rotatably connected.

A horizontal revis 27 is attached to the lower part of the hanging insulator 5, and a horn mounting bracket 29 is connected to the horizontal revis 27 by a shaft 28 so as to be rotatable in the track direction. A vertical clamp 30 that grips the power transmission line 4 is connected by a shaft 28 so as to be rotatable in the line direction. Further, an arc horn 31 serving as a discharge electrode is attached to the horn fitting 29. An arc horn 32 for preventing creeping flash of the hanging insulator 5 is attached to both horn fittings 25 and 29.

A mounting flange 33 of the lightning arrester 6 is fixed to the mounting plate 19 constituting the mounting link mechanism 3 with bolts,
A discharge electrode 35 is attached to the lower electrode 34 and faces the arc horn 31 with a predetermined aerial discharge gap G therebetween. Inside the lightning arrester 6, there is a resistance element (not shown in the figure, but below, 7 will be simply explained. 36 is integrally formed, and its tip is electrically connected to an insulated terminal 37 provided at the upper end of the lightning arrester 6.
An operating current sensor 38 consisting of a current transformer for detecting the lightning surge current flowing through the lightning arrester 6 and a fault current sensor 39 consisting of a current transformer for detecting the fault current generated when the lightning arrester 6 fails are attached. There is.

On the other hand, the tower body 1 has a bracket 40 connected to the two current sensors 38, 39 via cables 41, 42, respectively, and a plurality of (in this embodiment, 4flN) and a failure display section 44 that is activated when the lightning arrester 6 is out of order due to deterioration or the like and cannot cut off the follow-on current generated following the lightning surge current. Each of the display parts 43 and 44 has gunpowder inside (as shown), a display piece 45 that pops out to the outside due to the explosive force of the gunpowder, and a display band 46 made of resin or synthetic fiber that pops out and hangs down (for example, a width of 10C11 and a length of 50cm). degree). It is desirable that the display piece 45 and the display band 46 have different colors for each display section 43 and 44, and that the display band 46 of the failure display section 44 has a unique color.

Said cable 41.42 is connected to the second display section 43.44.
As shown in the figure, they are removably connected by a watertight plug 47. This plug 47 inserts a male terminal 48 on the cable side into a female terminal 49 on the display section 43, 44 side,
A gasket 52 is interposed between the end face of the cable 41, 42 and a mounting tube 51 formed on the case 50 of the display section 43, 44, and a cap-shaped lid 53 is screwed into the mounting tube 51. There is.

Next, the operation of the lightning horn insulator device configured as described above will be explained.

When a surge voltage caused by a lightning strike flows through the electric wire 4, this voltage is discharged in the air discharge gap G between the arc horn 31 and the discharge electrode 35, and the non-linear resistance element built into the lightning arrester 6, the insulation It flows through the terminal 37, the ground conductor 36, the attachment link mechanism 3, and the support arm 2 to the tower body and is grounded. Moreover, the subsequent arc generated thereafter is blocked by the above-mentioned aerial discharge gap G and the nonlinear resistance element.

When the lightning surge current flows through the ground conductor 36, the operating current sensor 38 detects this current, and the cable 41
is input to the operation display section 43, where it is determined that the lightning arrester 6 has been operated, the gunpowder in the operation display section 43 is ignited, and the display piece 45 is projected by the explosive force of this gunpowder, and the display is The band 46 pops out and hangs down, and its operation can be confirmed from the ground.

Each time this lightning surge current enters the lightning arrester 6, the operation display section 43 is activated as described above, so it can be confirmed how many times the lightning surge current has entered the lightning arrester 6.

Additionally, if the non-linear resistance element of the lightning arrester 6 deteriorates due to repeated lightning surge voltages that exceed expectations, the follow-on current after the snow surge current cannot be interrupted.
9, the failure signal is input to the failure display unit 44 via the cable 42 and activated, so the failure can be confirmed from the ground.

Effects of the Invention As detailed above, in this invention, the operation display section and the failure display section, which are displayed using the explosive power of gunpowder, are attached to the tower body on the ground side, so the size of both display sections can be reduced. can be set arbitrarily, which makes it possible to easily check the operation and failure status from a location far from the tower body, and has the excellent effect of allowing both display parts to be replaced while the line is live. .

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of the operation and failure display device of a lightning arrester according to an embodiment of the present invention, FIG. 2 is a sectional view of a water plug, and FIG. 3 is a lightning horn insulator of the present invention. FIG. 4 is a front view showing the entire device, and FIG. 4 is an exploded perspective view of the vicinity of the mounting bracket. ■... Tower body, 2... Support arm, 3... Mounting bracket, 4... Power transmission line, 5... Hanging insulator, 6... Lightning arrester, 7... Operation and failure Display device, 37... Insulated terminal, 38... Operating current sensor, 39... Fault current sensor, 41, 42... Cable, 43... Operation display section, 44... Fault display section, 45...Display piece, 46.
...Display band, 47...Water nectar plug.

Claims (1)

[Scope of Claims] 1. A power transmission line is supported via a hanging insulator on the support arm of the tower body, and a lightning arrester is attached, and a discharge electrode attached to the side of the suspension insulator and a discharge electrode of the lightning arrester are attached. In a lightning protection horn insulator device in which the lightning protection horn insulators face each other with a predetermined air discharge gap, an operating current sensor and a fault current sensor are installed on the tower body side for detecting lightning surge current flowing through the lightning arrester and fault current that occurs when the lightning arrester fails. and an operation display unit and a failure display unit, each of which includes a built-in gunpowder that is activated based on an operation signal or a failure signal output from the operation current sensor and the failure current sensor via cables, respectively. A device for indicating the operation and failure of a lightning arrester in a lightning protection horn insulator device. 2. Claim 1, wherein the operating current sensor and the fault current sensor are provided close to the tower body side of the lightning arrester.
A device for indicating the operation and failure of a lightning arrester in the lightning horn insulator device described in 2. 3. The operation and failure display device for a lightning arrester insulator in a lightning horn insulator device according to claim 1, wherein the operation display unit and the failure display unit are provided near the tower body. 4. The operation and failure display device for the lightning arrester in the lightning horn insulator device according to claim 1, wherein the operating current sensor and the fault current sensor are current transformers attached to a ground conductor routed from an insulated terminal of the lightning arrester. .