JP2656105B2 - Lightning-resistant horn insulator device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention prevents a permanent ground fault by rapidly discharging an abnormal current due to a lightning surge to a transmission line to a ground side by a lightning arrester function. The present invention relates to a lightning-resistant horn insulator device having a lightning arrester.

[Prior Art] As a conventional lightning-resistant horn insulator device, the one shown in FIG. 5 has been proposed. This apparatus supports a suspension insulator 8 to a support arm 2 of a tower via a ground-side connection bracket J1, and supports a transmission line 12 at a lower end of the suspension insulator 8 via a power-supply-side connection bracket J2. doing. A lightning arrester 15 is fixed downward to the grounding-side connecting metal J1 via a mounting adapter 13, and is attached to the ground-side discharge electrode 23 attached to the lower end of the lightning-proofing insulator and the power-receiving-side connecting metal J2. And the discharge electrode 24 on the power application side with a predetermined air discharge gap G.

[Problems to be Solved by the Invention] However, the conventional lightning-resistant horn insulator device is
Since the grounding-side discharge electrode 23 is directly attached to the tip of the IGBT, for example, when the connection length of the suspension insulator 8 is short, the mounting adapter 13 is started up to secure the discharge gap G and the lightning arrester 15 Must be displaced upward, in this case, the insulation clearance between the transmission line located in the upper phase and the upper conductive part of the lightning arrester 15 becomes small, and application to the existing transmission line support insulator device becomes difficult. There was a problem.

Further, if a special mounting adapter for displacing the lightning arrester 15 upward is used as described above, there is a problem that the installation cost is increased.

An object of the present invention is to provide a lightning-resistant horn insulator device that can be easily applied to an existing transmission line supporting insulator device and that can reduce the installation cost without using a special mounting adapter for lifting up. To provide.

Means for Solving the Problems In order to achieve the above object, the present invention provides a support arm attached to a tower main body with a support insulator for supporting a power transmission line, and a lightning arrester via a mounting adapter. Attaching an auxiliary insulator provided with a ground-side discharge electrode to a grounded object, connecting the power-supply-side electrode of the lightning arrester and the ground-side discharge electrode by a lead wire, and further mounting the support insulator An air discharge gap is provided between the power application side discharge electrode supported by the power side connection fitting and the ground side discharge electrode.

[Operation] According to the present invention, the discharge electrode on the ground side is supported by the auxiliary insulator, and the lightning arrester and the discharge electrode on the auxiliary insulator side are connected by the lead wire. As a result, the temperature can be greatly improved, and as a result, it can be easily applied to the existing transmission line supporting insulator device, and the installation cost can be reduced.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS.
Description will be made based on the drawings.

As shown in FIG. 2, a support arm 2 is mounted on the tower main body 1, and a mounting bracket 3 is fastened and fixed to a distal end portion of the support arm 2 with a bolt as shown in FIG. Supports a U clevis link 4 which is swingable. An arc horn 5 is provided at the lower end of the U clevis link 4.
The horn mounting bracket 6 for supporting the horn is connected by a connecting pin so as to be rotatable in the line direction. Further, a suspension insulator 8 as a supporting insulator formed by connecting a large number of suspension insulators in series is connected to the horn mounting bracket 6 via a connecting bracket 7. Further, a lower horn mounting bracket 19 for supporting the arc horn 9 is connected to a lower end of the suspension insulator 8, and a transmission line 12 is mounted on the mounting bracket 10 via a wire clamp 11.

In this embodiment, the grounding-side connecting bracket J1 is constituted by the mounting bracket 3, the U-clevis link 4, the upper horn mounting bracket 6, the connecting metal 7, and the like, and the power receiving side is constituted by the lower horn mounting bracket 10 and the wire clamp 11. A connection fitting J2 is configured.

On one side of the support arm 2, a mounting adapter 13 is horizontally cantilevered so as to be substantially parallel to the line direction, and the lower end of the adapter 13 has an upper end of a lightning arrester 15 with a built-in nonlinear resistance element 14. The ground-side electrode 16 located in the section is fixed by bolts. A power-supply-side electrode 17 is attached to the lower end of the lightning arrester 15.

An auxiliary insulator 18 is cantilevered obliquely downward on the horn mounting bracket 6. The auxiliary insulator 18 includes a tension-insulating rod 19 such as FRP, ground-side and power-supply-side fittings 20 and 21 fitted and fixed to both ends thereof, and the tension-insulating rod 1.
A grounding-side mounting bracket 20 is fixed to the upper horn mounting bracket 6 by bolts.

A ground-side discharge electrode 23 is obliquely downwardly cantilevered by the mounting bracket 21, and faces a power-supplying-side discharge electrode 24 mounted on the horn mounting bracket 10 with a predetermined air discharge gap G.

The ground-side discharge electrode 23 and the power-supply-side electrode 17 of the lightning arrester 15 are connected by a lead wire 25. One end of the lead wire 25 is connected to a bracket 26 provided on the mounting bracket 21 by a bolt 27, and the other end is attached to a bracket 28 fixed to the lower end of the power receiving electrode 17 as shown in FIG. It is inserted into the case 29 and is connected to a mainspring spring 30 housed in the case 29. A contact 31 that contacts the lead wire 25 is mounted in the storage case 29.
When the power transmission line 12 swings due to wind pressure or the like, the suspension insulator 8 swings around the upper suspension point, and the lead wire 25 moves together with the auxiliary insulator 18, the lead wire 25 is cut off. Not to be.

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

Now, when a lightning surge current enters the power transmission line 12, the current flashes over the air discharge gap G from the power-supplying connection fitting J2 and the power-supplying-side discharge electrode 24 to reach the ground-side discharge electrode 23, and leads The current flows to the non-linear resistance element 14 in the lightning arrester 15 via the wire 25, the contact 31, the bracket 28 and the power supply side electrode 17, and further to the ground through the ground side electrode 16, the mounting adapter 13, the support arm 2 and the main body 1. Discharged. Further, the subsequent current generated thereafter is suppressed and cut off by the non-linear resistance element 14, thereby preventing a ground fault accident.

Now, in the embodiment of the present invention, the auxiliary insulator 18 is supported by the horn mounting bracket 6, the tip of the auxiliary insulator 18 is supported by the ground-side discharge electrode 23, and the lightning arrester 15 is independently attached to the mounting adapter.
The auxiliary insulator 18 is attached to the supporting arm 2 by the lead 13 and the power-supply-side electrode 17 of the lightning arrester 15 is connected by the lead wire 25, so that the auxiliary insulator 18 is insulated from the ground-side discharge electrode 23 and the horn mounting bracket 6. The lightning arrester 15 can be freely attached to any place of the support arm 2 without being restricted by the place where the discharge electrode 23 is installed. That is, since the installation location of the ground-side discharge electrode 23 supported by the auxiliary insulator 18 is not restricted by the installation location of the lightning arrester 15, a special mounting adapter is used to secure the air discharge gap G. There is no need to lift 15 upward.

Further, the installation location of the lightning arrester 15 does not have to be displaced upward, but the distance between the power-applied-side electrode 17 and the power-applied-side discharge electrode 24 of the lightning arrester 15 does not become smaller than the air discharge gap G. In order to install the lightning arrester 15 in the range, the mounting adapter 13 is displaced in the horizontal direction along the support arm 2 and the installation location of the lightning arrester 15 is adjusted. At this time, it is not necessary to increase the extension (cantilever support) distance of the mounting adapter 13 from the support arm 2.
As a result, it is possible to freely attach the suspension insulator 8 of the existing transmission line support insulator device without reducing the connection length of the suspension insulator 8 and the insulation clearance between the lightning arrester 15 and the upper-phase transmission line 12. The installation cost can be greatly reduced as compared with the case where the connection length of the insulator 8 is changed.

The present invention can be embodied as follows.

(1) As shown in FIG. 4, a pair of left and right tension insulators 32, 32 are connected to the distal end of the support arm 2 and the transmission line 12 is connected by jumper wires 33. The auxiliary insulator 18 is attached to J1, and the discharge electrode 24 provided on the power-supply-side connecting bracket J2 is opposed to the ground-side discharge electrode 23 provided at the tip of the auxiliary insulator 18.

(2) In the above embodiment, the present invention is embodied as a suspension insulator device and a tension insulator device.

[Effects of the Invention] As described above in detail, the present invention can be easily applied to an existing transmission line support insulator device, and greatly reduces the installation cost as compared with changing the connection length of the support insulator. There is an effect that can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of the present invention,
FIG. 2 is a right side view of FIG. 1, FIG. 3 is a cross-sectional view showing a connection structure of a lead wire, FIG. 4 is a schematic perspective view of the present invention embodied in a lightning insulator, and FIG. 1 is a front view showing a lightning-resistant horn insulator device of FIG. DESCRIPTION OF SYMBOLS 1 ... Tower main body, 2 ... Support arm, 6 ... Horn mounting bracket, 8 ... Hanging insulator as a support insulator, 10 ... Horn mounting bracket, 12 ... Transmission line, 13 ... Mounting adapter, 15 ......
Lightning arrester, 16 (17)… Ground (electrode side) electrode, 18…
Auxiliary insulator, 23: ground-side discharge electrode, 24: power-applying side discharge electrode, 25: lead wire, J1 ... ground-side connection bracket, J2 ...
… Power connection side fitting, G… Aerial discharge gap.

Claims (1)

(57) [Claims] A support arm (8) for supporting a power transmission line (12) is provided for a support arm (2) mounted on a tower body (1), and a lightning arrester is provided via a mounting adapter (13). (15), and an auxiliary insulator (18) having a discharge electrode (23) on the ground side is mounted on the grounded object (J1). The auxiliary insulator (18) of the lightning arrester (15) is The grounding-side discharge electrode (23) is connected to the grounding-side discharge electrode (23) by a lead wire (25). A lightning-resistant horn insulator device having an air discharge gap (G) between the discharge electrode (23) and the discharge electrode (23).