JPH0517867Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to the structure of a current transformer that detects current values.

[Conventional technology]

Conventionally, there has been a current transformer of this type as shown in FIG. In the figure, 1 is a mold type current transformer, 2 is a through hole through which the primary current detection bus 6 of the current transformer 1 is passed, and 3 is a mounting foot for fixing the current transformer 1, which has an external shape parallel to the through hole 2. located outside the line. 4 is a connector that outputs the detected secondary current;
5 is a screw for attaching and fixing the current transformer 1 to a panel or the like.

The conventional device is configured as described above, and its operation will be explained next.

The current transformer 1 is attached and fixed to a mounting plate (not shown) such as a panel as a mounting body with screws 5. A primary current detection bus 6 for detecting current is passed through the through hole 2 of the current transformer 1, and both ends are connected to the terminals of each circuit-constituting electric appliance. When energized, a primary current flows through the bus 6, and a secondary current proportional to the value flows through the connector 4.
output to the pin. Generally, a copper bus bar is used as the bus bar 6, and the heights of the terminals of the electrical appliances connected at both ends are rarely the same, and in most cases there is a difference. The height positions of the through holes 2 of the current transformers 1 installed in the middle are also different in most cases, and the heights at both ends and three points in the middle are different.

For this purpose, the shape of the bus bar 6 is bent to match the height, or the current transformer is floated with a spacer to make it straight.

[Problem to be solved by the invention]

Since conventional current transformers are constructed as described above, it is necessary to bend the bus bar in a complicated manner or to float and fix the current transformer with a spacer. Another disadvantage is that it is necessary to provide a spacer to mount the current transformer on the panel.

This idea was made in order to eliminate the drawbacks of the conventional ones as mentioned above. By changing the shape of the current transformer's mounting foot, it can be directly fixed to any position on the bus bar with screws, and it can also be attached to the current transformer using screws. The purpose is to provide a possible current transformer.

[Means to solve the problem]

In the current transformer according to this invention, a secondary conductor is wound and molded, and a substantially rectangular first through hole is formed in the center through which the primary conductor passes, and the axis of the first through hole is upward. In the current transformer, the mounting part has a mounting surface to the primary conductor formed on substantially the same plane as the inner surface of the first through hole, and the mounting part has a mounting surface to the primary conductor. A mounting surface to the mounting body is formed on the back side of the mounting surface of , and the mounting surface to the primary conductor and the mounting body can be fixed to either the above-mentioned primary conductor or the above-mentioned mounting body with a screw member. A second through hole is formed that penetrates between the mounting surfaces to the body.

[Effect]

In this invention, a primary conductor is inserted through a first through hole of a current transformer, and a mounting surface of the current transformer, which is formed in a mounting portion and is attached to the primary conductor, is brought into contact with the primary conductor; Insert a screw member into the second through hole from the side of the mounting surface to the mounting body and screw it into the primary conductor to fix it to the primary conductor, or connect the mounting surface to the mounting body to the mounting body. A screw member is inserted into the second through hole from the side of the mounting surface to the primary conductor and screwed into the mounting body, and is fixedly attached to the mounting body.

〔Example〕

An embodiment of this invention will be described below with reference to the drawings. In Figures 2 and 3, 11 is a molded current transformer, 2 is a through hole through which the primary current detection bus 6 of the current transformer 11 is passed, and 13 is a through hole for fixing the current transformer 11. A mounting surface for the primary conductor 6 is formed on the same plane as the inner surface of the through hole 2 on the extension of the hole 2, and a mounting plate for a panel or the like as a mounting body is provided on the back side of the mounting surface for the primary conductor 6 (Fig. (not shown) is parallel to the primary conductor mounting surface, and the current transformer 11
It is formed integrally with the external surface of. 4 is a connector for outputting the detected secondary current, and 5 is a screw as a mounting member for mounting and fixing the current transformer 11 to a panel or the like. The screw 5 passes through a through hole 5A, which serves as a mounting portion, formed in the mounting leg 13, and fixes the current transformer 11 to a panel or the like.

Fig. 4 shows an installation method similar to that shown in Fig. 1 using the current transformer 11 of this invention, and Fig. 5 shows a connection using electric wire 6 as the primary current detection bus 6. This is what I did. The current transformer according to this invention is constructed as described above.

Next, its operation will be explained. The primary current detection bus 6 is passed through the through hole 2 of the current transformer 11, and both ends are connected to the terminals of each circuit-constituting electrical appliance. The current transformer 11 has its mounting foot 13 connected to the busbar 6 by screws 5.
Fix it in any position. A copper busbar is used for the busbar 6, and the heights of the terminals of the electrical appliances connected to both ends are still different, but the current transformer 11 installed between them is fixed directly to the busbar 6, not to a mounting plate such as a panel. Therefore, the shape of the generatrix 6 may be bent by simply creating a difference between both ends.

By changing the shape of the mounting foot 13 of the current transformer 11,
In addition, the current transformer 11 is reversed and screws 5 are attached to the mounting plate of a panel, etc.
If you install it with , the conventional installation method is also possible.

[Effect of idea]

As described above, according to this invention, the first through hole is provided with a mounting portion that protrudes in the axial direction, and the mounting portion is located on the same plane as the inner surface of the first through hole. A mounting surface to the conductor is formed, and a mounting surface to the mounting body is formed on the back side of the mounting surface to the primary conductor, and a space between the mounting surface to the primary conductor and the mounting surface to the mounting body is formed. Since the second penetrating hole is formed, it is possible to easily attach and fix the primary conductor and the mounting body with screw members.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional current transformer, Fig. 2 is a perspective view showing an embodiment of this invention, Fig. 3 is a sectional view taken along the line - - of Fig. 2, and Fig. 4 is a current transformer of this invention. FIG. 5, which is a perspective view of the device mounted using the conventional mounting method, uses an electric wire as the primary current bus. In the figure, 1 and 11 are current transformers, 2 is a through hole, and 3, 1
3 is a mounting foot, 5 is a screw, 5A is a through hole, 6 is a primary current detection bus bar, and 7 is an electric wire. Note that one reference numeral in the figure indicates the same or equivalent part.

Claims (1)

[Claims for Utility Model Registration] A secondary conductor is wound and molded, and a substantially rectangular first through hole is formed in the center through which the primary conductor passes, and protrudes in the axial direction of the first through hole. In the current transformer, the mounting portion has a mounting surface for the primary conductor formed on substantially the same plane as the inner surface of the first through hole,
A mounting surface to the mounting body is formed on the back side of the mounting surface to the primary conductor, and the mounting surface to the primary conductor can be fixed to either the primary conductor or the mounting body with a screw member. A current transformer, characterized in that a second through hole is formed that penetrates between the mounting surface and the mounting surface to the mounting body.