JPS6325631Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention consists of attaching several main body insulators to an upper frame in a suspended manner, and attaching a movable insulator to a movable insulator support frame that moves up and down using a lifting guide hanging from the upper frame as a guide. In an air switch having a configuration in which a movable contact blade provided on the movable insulator is inserted into a fixed electrode provided on the main insulator by lifting the movable insulator support frame, a movable contact blade provided on the movable insulator is inserted from the bottom surface in order to attach the fixed electrode to the main insulator. A parallel recess is formed adjacent to the parallel recess, an arrester element is inserted into the parallel recess, the power supply electrode of the element is connected to the fixed electrode, and a ground wire connected to the ground electrode is connected from the ceiling of the parallel recess. This relates to an air switch that is pulled out upward and connected to an upper frame, and the arrester element is grounded by the upper frame.

Connecting an arrester element to an air switch as a countermeasure against lightning accidents is not a new technology;
The present invention consists of a concave part of the main body insulator to which a fixed electrode is attached;
By providing the parallel recess for inserting the arrester element next to each other, it is possible to incorporate the arrester element into the air switch, and the arrester element can be replaced even when the upper frame is mounted on the column. This is what I did.

An embodiment of the present invention will be described with reference to the accompanying drawings.

1 is an air switch consisting of a main insulator 2, a movable insulator 7, etc. The main insulator 2 is provided with recesses 3 and 4 formed from the lower surface at the front and rear thereof, and fixed electrodes 5 and 6 are attached to them, respectively. Fixed to the insulator 7 are movable electrode blades 8 and 9 that are inserted into contact with the fixed electrodes 5 and 6, and a conductive material 10 that protrudes from both electrode blades 8 and 9.

A side protrusion 11 is provided on the side of the recess 3 in which one of the fixed electrodes 5 of the main body insulator 2 is mounted, and a parallel recess 12 is formed from the lower surface. This parallel recess 12
and recess 3 are adjacent to each other with partition wall 13 in between,
The partition wall 13 has a relatively small degree of downward protrusion,
A communicating portion 14 between the parallel recess 12 and the recess 3 is formed below the partition wall 13 .

In the parallel recess 12, an arrester element 15 is inserted, which is formed by stacking several non-linear resistors 17 such as zinc oxide on a power supply electrode 16, and further bonding a ground electrode 18. A crank-shaped power supply connection plate 19 made of a plate is passed through the communication part 14 almost horizontally and fixedly connected to the fixed electrode 5 in the recess 3, and the ground connection wire 20 connected to the ground electrode 18 is connected to the groove in the ceiling of the parallel recess 12. Pull it upward through the hole 12'.
A resin ring insulator 21 is firmly fitted into the slot 12' between the periphery of the hole and the outer periphery of the ground connection wire 20.

As shown in FIG. 3, the power supply connection plate 19 can be divided into two parts, a connection part 19a to a fixed electrode and a connection part 19b to a power supply electrode, and a discharge bulb can be attached to each end to form a discharge gap g. . The appropriate location for the discharge gap g is the communication portion 14.

The discharge gap may be provided on the ground electrode 18 side.

The other terminals 22 are inserted into the recesses 3 and 4 from both the front and rear sides of the main insulator 2 and connected to the fixed electrodes 5 and 6, respectively, and 23 is a terminal cover.

Several of the main body insulators 2 are fixed in parallel to the lower surface of the upper frame 24, and a movable insulator mounting frame 26 is fitted into a guide column 25 hanging from the upper frame 24 to move up and down.
Then, the corresponding movable insulators 7 are attached to each of the main body insulators 2, and the air switch is assembled in the usual manner. The grounding connection line 20 is connected all at once to the upper frame 24 having a low electric resistance value or to the device grounding terminal 27 provided on the upper frame 24, and is grounded via the device grounding wire.

The present invention has the configuration as exemplified above, and is provided with a parallel recess 12 into which the arrester element 15 is inserted, adjacent to the downward recess into which the fixed electrode of the main body insulator 2 is mounted. Although a bulge is produced on the side of the main insulator 2 in order to form the main body insulator 2, a sufficiently wide and high hollow parallel recess 12 can be formed thereby to facilitate the insertion of the arrester element 15.
Moreover, the mounting dimensions of the air switch, in which an appropriate number of main body insulators 2 and movable insulators 7 are assembled on the upper frame and the movable insulator mounting frame, can be made the same as before, and the arrester with lightning protection is built-in. An air switch can be easily constructed. Further, even when the air switch is mounted on the pole, the arrester element 15 can be replaced from below the main body insulator 2 while paying attention to insulation.

[Brief explanation of drawings]

The attached drawings show an embodiment of the present invention, in which Fig. 1 is a partially longitudinal side view, Fig. 2 is an enlarged longitudinal front view of the main part of the main insulator 2, and Fig. 3 is an enlarged front view of a modified embodiment. It is a diagram. 2...Main insulator, 3, 4...Recess, 5, 6...
Fixed electrode, 7...Movable insulator, 12...Parallel recess,
13... partition wall, 15... arrester element, 16...
Power supply electrode, 17... Non-linear resistance, 18... Ground electrode, 19... Power connection board, 20... Ground connection wire.

Claims (1)

[Scope of utility model registration request] A parallel recess is provided adjacent to the recess in the main insulator with a fixed electrode attached to the recess provided from below, an arrester element is inserted into the parallel recess, and the power supply electrode of the element is connected to the fixed electrode. An air switch characterized in that a grounding wire connected to a grounding electrode is drawn upward from the ceiling of a parallel recess.