JPS5823183Y2 - Conductor connection structure of compact switchgear - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a conductor connection structure for a reduced-sized switchgear.

In a reduced type switchgear, both ends of the conductor are connected to terminals on the breaker side and the disconnector side with a grounding device, respectively, in order to electrically connect them, but the distance between the two terminals is determined by assembly error. The length of the conductor is not always constant due to other factors, and the length of the conductor also varies due to molding errors.

Conventionally, due to such dimensional errors, it was necessary to correct the combination on site, but since the conductor has a large diameter, the correction work required a large amount of man-hours and time.

The cause of the above drawback lies in the conventional connection structure of the conductor ends.

To explain this with reference to Figures 1 to 3, 1 is a breaker section, 2 is a disconnector with a grounding device, 3.3.3 is a bus connecting the breaker side and the disconnector side, that is, a conductor, and 4 is a breaker A sliding contact 4' connects the conductor 3 to the conductor 1 side, and a sliding contact 4' connects the conductor 3 and the disconnector 2.

4. In 4', 6 is a fixed mold, 7 is a shield case inside the fixed mold 6, and 8
is a contact piece pushed inside the shield case 7 by a spring 5, and one end of this contact piece 8 is in contact with, for example, a terminal portion 9' of a conductor 9 on the breaker 1 side.

For example, a terminal portion 3' of the conductor 3 on the disconnector 2 side is in contact with the contact piece 8.

According to the conventional conductor (crossing busbar) connection structure, if there is an error in the length or bending of the conductor 3 due to component errors or assembly errors, the sliding contact 4 that becomes the connection part
The centering of the conductor and the conductor terminal portion 3', that is, the centering of the conductor, is extremely difficult due to the large diameter and difficulty in bending.

The present invention improves the above-mentioned conventional drawbacks.

The embodiment of the present invention will be described below with reference to FIGS. 4 to 6.

The connection between the conductor 3 and the breaker 1 side is the same as the conventional one, but the structure of the connection between the conductor 3 and the breaker 2 side is improved.

To explain this with reference to FIG. 6, 10 and 10' are connection plates made of two soft copper plates stacked one on top of the other, and the middle part is bent at a predetermined angle. The radius of curvature is larger than that of the outer connecting plate 10', and a gap G is formed at the bent portion.

Oval holes 11.11' and 12.12' are formed at both ends of the connecting plate 10.10', respectively, so that one end of the connecting plate 10.10' touches the end of the conductor 3. Furthermore, bolts 13.13 are inserted into one oval hole 12.12' and are tightened and fixed to the conductor.

The other end of the connection plate 10.10' is applied to the top surface of the relay terminal 16 provided at the tip of the support insulator 15 attached to the disconnector, and the terminal 14.14 is inserted into the oblong hole 11.11'.
It is tightened and fixed to the relay terminal.

The conductor connection structure of the present invention described above has the following effects.

That is, at the connection between the conductor and the disconnector, the conventional connection using a sliding contact is abolished and the connection is made using a connecting plate, making it extremely easy to modify the dimensions of the conductor.

The reason for this is that depending on the dimensional error of the conductor, the connection plate must be replaced or bent, and even the bolt insertion holes formed at both ends of the connection plate may need to be slid in position, requiring highly skilled and highly skilled techniques. This is because anyone can easily and easily modify it.

Therefore, the processing of the conductor does not require a more sophisticated bending process than in the past, and the bending process can be performed with rough accuracy, making manufacturing easier.

In particular, since two connecting plates are stacked and the radius of curvature of the bent portion of the inner connecting plate 10 is larger than that of the outer connecting plate 10', and a gap G is formed between the two, outward bending is prevented. Of course, inward bending can be easily done to the limit of the gap G, so
Bending correction can be easily and stably performed, and even when the correction is completed and the bolts are tightened and fixed, there is no slippage.

Furthermore, since the present invention uses a connecting plate, no contact portion is required, and expensive connecting parts such as sliding contacts are no longer required.

[Brief explanation of drawings]

Figures 1 to 3 show conventional conductor connection structures, with Figure 1 being an explanatory front view, Figure 2 being a right side view of Figure 1, Figure 3 being a cross-sectional view of the connection, and Figures 4 to 3. FIG. 6 shows a conductor connection structure according to the present invention, FIG. 4 is a front explanatory view, FIG. 5 is a right side view of FIG. 4, and FIG. 6 is a sectional view of the connection structure. 1...Disconnector, 2...Disconnector, 3.
...Conductor, 4゜4'...Connection part, 10.
10'... Connection plate, 11.11', 12°12
'...Slong hole, 13.14...Bolt.

Claims (1)

[Claims for Utility Model Registration] In a conductor connection structure that electrically connects a circuit breaker and a disconnector, (a) two soft connection plates 10 and 10' are bent at a predetermined angle in the middle; At the same time, the radius of curvature of the bent portion of the inner connecting plate 10 is made larger than the radius of curvature of the bent portion of the outer connecting plate 10', and both connecting plates 10 and 10' are overlapped, (b) 2 above. Elongated holes 1 at both ends of the connecting plates 10 and 10'
1.11' and 12.12' are formed, and (c) one end of the two connection plates 10.10' overlaps the conductor 3,
The bolts 13 passed through the elongated holes 12 and 12' are tightened. A conductor connection structure for a reduced type switchgear, characterized in that the tightening is fixed by a bolt 14 passed through the elongated hole 11.11'.