JPH02216717A - Lighting horn insulator device - Google Patents

Abstract

PURPOSE:To apply a lightning horn insulator device to an existing transmission line supporting insulator device with a low cost by attaching an auxiliary insulator, having a discharge electrode at ground side, to a link fitting or a supporting arm at ground side of a supporting insulator and connecting an electrode at power supply side of a lightning insulator and the discharge electrode at ground side to each other via a lead wire. CONSTITUTION:An auxiliary insulator 18 is supported by a horn fitting 6. A discharge electrode 23 at ground side is supported by the auxiliary insulator 18 at an edge thereof. A lightning insulator 15 only is attached to a supporting arm 2 by means of a fitting adaptor 13. The discharge electrode 23 and an electrode 17 at power supply side of the lightning insulator 15 is connected to each other via a lead wire 25. Thus, the auxiliary insulator 18 may be compact for sufficiently keeping insulation between the discharge electrode 23 at ground side and the horn fitting 6. Furthermore, the lightning insulator 15 is not restricted by a place where the discharge electrode 23 is grounded so that the lightning insulator 15 is attached to any place of the supporting arm 23.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention uses a lightning protection function to quickly discharge abnormal current to the ground when a lightning surge causes an abnormal current to flow in a power transmission line, thereby preventing a permanent ground fault. This invention relates to a lightning horn insulator device equipped with a lightning arrester.

[Prior Art] As a conventional lightning protection horn insulator device, one shown in FIG. 5 has been proposed. This device supports a hanging insulator 8 to a support arm 2 of a steel tower via a ground side connecting fitting J1, and a power transmission line 12 is supported at the lower end of this hanging insulator 8 via a power side connecting fitting J2. are doing. In addition, a lightning arrester 15 is fixed downward to the earthing side connecting fitting J1 via a mounting adapter 13, and a grounding side discharge ti# is attached to the lower end of the lightning arrester.
123 and the charging-side discharge electrode 24 attached to the charging-side coupling fitting J2 are opposed to each other with a predetermined air discharge gap G therebetween.

[Problems to be Solved by the Invention] However, the conventional lightning horn insulator device has a lightning arrester 15.
Since the ground side discharge electrode 23 was directly attached to the tip of the lightning arrester 15, for example, when the connection length of the hanging insulator 8 is short, the mounting adapter 13 is raised to ensure the discharge gap G. When it becomes necessary to displace the lightning arrester 15 upward or to displace the lightning arrester 15 laterally, when the lightning arrester 15 is displaced upward, the connection between the transmission line located in the upper phase and the upper end conductive part of the lightning arrester 15 Insulation clearance becomes smaller,
There was a problem in that it was difficult to apply to existing power transmission line support insulator devices.

Furthermore, if a special mounting adapter is used to displace the lightning protection glass 15 upward or sideways, or if the support arm 2 is modified as described above, there is a problem in that the installation cost becomes high.

An object of the present invention is to provide a lightning horn insulator device that can be easily applied to an existing power transmission line support insulator device and can reduce installation costs.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a support insulator for supporting a power transmission line on a support arm attached to a steel tower body, and also attaches an M thunder hook via a mounting adapter. is attached, and an auxiliary insulator equipped with a ground side discharge ttt is attached to the ground side connection fitting of the support insulator or the support arm, and the energized side electrode of the Nil avoidance element and the ground side discharge electrode are connected to each other. are connected by lead wires, and an air discharge gap is provided between the energizing release electrode supported by the energizing side coupling fitting of the support insulator and the grounding side discharge electrode.

[Function] This invention supports the ground side discharge electrode with an auxiliary insulator,
Since the lightning arrester and the discharge electrode on the auxiliary insulator side are connected by a lead wire, the degree of freedom in installing the lightning arrester and the discharge electrode on the ground side is greatly improved. It can be easily applied and installation costs can be reduced.

[Example] Hereinafter, an example embodying the present invention will be described based on FIGS. 1 to 4.

As shown in FIG. 2, a support arm 2 is attached to the tower body 1, and a mounting bracket 3 is fastened to the tip of the support arm 2 with bolts as shown in FIG. A U clevis link 4 is swingably supported on the metal fitting 3. A horn mounting bracket 6 for supporting an arc horn 5 is connected to the lower end of the U clevis link 4 so as to be rotatable in the track direction by a connecting pin. Further, a hanging insulator 8 as a support glass, which is formed by connecting a number of hanging insulators in series, is connected to the horn mounting fitting 6 via a connecting fitting 7. Further, a lower horn mounting bracket 19 for supporting the arc horn 9 is connected to the lower end of the hanging eyelet 8, and a power transmission line 12 is connected to the mounting bracket 10 via a wire clamp 11.
is installed.

In this embodiment, the mounting fitting 3, the U clevis link 4, the upper horn fitting 6, the connecting fitting 7, etc. constitute a grounding side connecting fitting J1, and the lower horn fitting 10 and the wire clamp 11 make up the ground side connecting fitting J1. Connecting fittings J
2 are configured.

On the other hand, a mounting adapter 13 is horizontally cantilevered on one side of the support arm 2 so as to be substantially parallel to the track direction.
On the lower surface of the tip of this adapter 13, there is a grounding electrode 1 located at the upper end of the lightning protection glass 15 which has a built-in non-linear resistance element 14.
6 is fixed with a bolt. A charging III electrode 17 is attached to the lower end of the lightning arrester 15.

An auxiliary insulator 18 is cantilevered diagonally downward on the upper horn mounting bracket 6. This auxiliary insulator 18 is PR
A tensile insulating rod 19 such as P, ground side and power supply side mounting fittings 20.21 fitted and fixed to both ends thereof, and an insulating jacket made of rubber or the like coated around the outer periphery of the tensile insulating rod 19. 22, and a ground side mounting bracket 20 is fixed to the upper horn mounting bracket 6 with a bolt.

A ground-side discharge electrode 23 is cantilevered diagonally downward on the mounting bracket 21, and faces the energized-side discharge electrode 24, which is not attached to the horn mounting bracket 10, with a predetermined air discharge gap G therebetween.

The ground side discharge pole 23 and the energized side electrode 17 of the lightning arrester 15 are connected by a lead 1125. One end of the lead wire 25 is connected by a bolt 27 to a bracket 26 provided on the mounting bracket 21, and the other end is attached to a storage case attached to a bracket 28 fixed to the lower end of the power-supplying electrode 17, as shown in FIG. 29 and connected to a spiral spring 30 housed within the case 29.

A contactor 31 that comes into contact with the lead wire 25 is installed inside the storage case 29 . When the power transmission line 12 swings due to wind pressure or the like, the hanging insulator 8 swings around the upper hanging point, and the lead wire 25 moves together with the auxiliary insulator 18, the lead wire 25 is cut. I'm trying not to.

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

Now, when a lightning surge current enters the power transmission line 12, this current flashes over the air discharge gap G from the connection fitting J2 on the power supply side and the discharge electrode 24 on the power supply side, and the discharge on the ground side is transmitted to the pole 2.
3, lead wire 25, contact 31, bracket 28
The electric current flows through the charging side electrode 17 to the nonlinear resistance element 14 in the lightning arrester 15, and is further discharged to the ground through the grounding side electrode 16, the mounting adapter 13, the support arm 2, and the main body 1.

Furthermore, the follow-on current that occurs thereafter is suppressed and interrupted by the non-linear resistance element 14, thereby preventing a ground fault.

Now, in the embodiment of the present invention, the auxiliary insulator 18 is supported by the horn mounting bracket 6, the ground side discharge electrode 23 is supported at the tip of the auxiliary insulator 18, and the lightning arrester 15 is supported independently by the mounting adapter 13. Attached to arm 2, the discharge voltage [! 23 and lightning arrester 15 [t17] are connected by the lead wire 25, the auxiliary insulator 18 must be small enough to ensure insulation between the discharge electrode 23 on the ground side and the horn mounting bracket 6. In addition, the lightning arrester 15 is not restricted by the grounding point of the discharge voltage @23,
It can be freely attached to any location on the support arm 2. As a result, the hanging insulator 8 of the existing power transmission line support insulator device
It can be installed freely without reducing the connection length of the lightning arrester 15 or the insulation clearance between the lightning arrester 15 and the upper phase power transmission line 12, and the connection length of the hanging insulator 8 can be changed or the support arm 2 can be modified. Installation costs can be significantly reduced compared to

Note that this invention can also be embodied as follows.

(1) In a tension insulator device in which a pair of left and right tension insulators 32 and 32 are connected to the tip of the support arm 2 and the power transmission line 12 is connected to the jumper wire 33 as shown in FIG. The auxiliary insulator 18 is attached to the auxiliary insulator 18, and the discharge electrode 24 provided on the power supply side coupling fitting J2 and the ground side discharge electrode 23 provided at the tip of the auxiliary insulator 18 are made to face each other.

(2) In the above embodiments, the present invention is applied to a suspended insulator device and a tension-resistant insulator device;

[Effects of the Invention] As detailed above, the present invention can be easily applied to an existing power transmission line support insulator device, and the connection length of the support insulators can be changed or the support arm can be modified. This has the effect of significantly reducing installation costs compared to

[Brief explanation of the drawing]

Figure 1 is a front view showing an embodiment of this gun sail;
Figure 2 is the right side view of Figure 1, Figure 3 is the lead wire connection.
FIG. 4 is a sectional view showing the structure, FIG. 4 is a perspective view of a medium embodying the present invention in a lightning protection insulator device, and FIG. 5 is a front view showing a conventional lightning protection/horn insulator device. DESCRIPTION OF SYMBOLS 1... Steel tower main body, 2... Support arm, 6... Horn mounting bracket, 8... Hanging insulator as a support insulator, 10
...Horn mounting bracket, 12...Power line, 13...
Mounting adapter, 15...g! 1 Raikanko, 16 (17)
...Grounding side (voltage side) electrode, 18...Auxiliary insulator, 2
3...Discharge electrode on the grounding side, 24...Discharge electrode on the charging side, 25...Lead wire, Jl...Grounding side connecting fitting,
J2: Power supply side connecting fitting, G: Air discharge gap. Patent applicant Nippon Insulator Co., Ltd. Agent Patent attorney On1) Hironobu

Claims (1)

[Claims] 1. A support insulator (8) for supporting the power transmission line (12) is provided to the support arm (2) attached to the tower body (1), and a lightning arrester (15) is installed via the mounting adapter (13). An auxiliary insulator (18) equipped with a discharge electrode (23) on the ground side is attached to the ground side connecting fitting (J1) of the support insulator (8) or the support arm (2), and the lightning arrester The energizing side electrode (17) of the insulator (15) and the grounding side discharge electrode (23) are connected by a lead wire (25), and the energizing side connecting fitting (J) of the supporting insulator (8) is connected.
2) A lightning horn insulator device characterized in that an air discharge gap (G) is provided between the energized side discharge electrode (24) and the grounded side discharge electrode (23) supported in 2).