JPS5922307A - Current transformer - Google Patents

Abstract

PURPOSE:To prevent the breakage of a winding conductor by a construction wherein an annular core is provided with a slotted spacer on at least one peripheral surface and the winding conductor is wound through slots of the slotted spacer. CONSTITUTION:A slotted spacer 3 is provided on at least one peripheral surface of an annular core 1, and a winding conductor 2 is wound through slots 4 of the slotted spacer 3. By so doing, there can be obtained a current transformer in which the winding conductor 2 will not undergo the load and will be prevented from breakage. Since the winding conductor for secondary winding thus arranged will not be directly subjected to the load, it becomes possible to eliminate the load applied and to prevent breakage of the winding conductor, thereby preventing the winding conductor from breaking.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a current transformer, and particularly relates to a secondary winding in which a winding conductor is wound around an annular core, and a primary conductor inserted into an inner hole of the annular core. A current transformer, for example, a current transformer that has only an annular core and a secondary winding, and a bunsing center conductor is passed through the inner hole of the annular core, and this center conductor is connected to the primary winding. Conventional example of a secondary winding used in a so-called bushing current transformer (BCT) used as a conductor
As shown in FIG. The secondary winding 1a is composed of an annular core 1 and a winding conductor 2 wound around the TAS core 1, but as the diameter and weight of the secondary winding 1a increases, the installation position becomes lower. A large load due to its own weight is applied to the P portion of the winding conductor 2 on the side, as shown by the arrow in the figure, and there is a fear that the winding conductor 2 may break.

In addition, in a large-capacity gas breaker, etc., a plurality of such secondary windings 1a are stacked around the same primary conductor as described above, or they are arranged in parallel. Each one may be used as a current transformer with its own purpose, but the same applies in such cases, and when used separately and stacked, it is installed at the bottom. In addition to its own weight, the winding conductor 2 of the current transformer (secondary winding 1a)
Since the weight of the next winding 1a is also added as a load, there is even greater concern that the winding conductor 2 will break.

The present invention has been made in view of the above points, and an object of the present invention is to provide a current transformer that can prevent disconnection of the winding conductor.

That is, the present invention is characterized in that a grooved spacer is provided on at least one surface of the outer periphery of the annular core, and the winding conductor is wound through the groove of the grooved spacer.

The present invention will be explained below based on the illustrated embodiments. An embodiment of the present invention is shown in FIGS. 3-8.

It should be noted that the same parts as in the conventional one are given the same reference numerals, and therefore the explanation and details will be omitted. In this embodiment, at least one surface of the outer periphery of the annular core 1 is provided with a grooved spacer. 3 was provided, and the winding conductor 2 was wound through the groove 4 of this grooved spacer 3. By doing so, the winding conductor 2 is not subjected to any load, and it is possible to obtain a current transformer in which disconnection of the winding conductor 2 is prevented.

That is, in this embodiment, two secondary windings Mlb are stacked on the bend of the primary conductor 5 inserted vertically (see Fig. 5), that is, when two current transformers are stacked and used. However, the secondary winding 1h has grooved spacers 3 on the upper and lower surfaces of the square core 1, respectively.
is attached, and the winding conductor 2 is passed through the groove 4 of the attached grooved spacer 3 to form a winding (see FIG. 7). Since the secondary windings 1b (see FIGS. 6 and 7) formed in this way are stacked, the protrusions 6 of the grooved spacers 3 are stacked in contact with each other, and the upper Secondary winding 1 installed in
In addition to b, the load of the secondary winding lb installed on the lower side is supported by the protrusion 6 of the grooved spacer 3, and no load is applied to the winding conductor 2. Breaking of the winding conductor 2 can be prevented.

Note that the vortex (-J spacer 3) is a thermosetting molding material (see Figs. 3 and 4) in which grooves 4 and protrusions 6 are formed by impregnating a glass base material with a thermosetting resin, for example. Above the ring core 1,
They are butted together using the abutment portions 7 along the respective shapes of the lower surfaces (see FIG. 8), and then heat-cured and attached to the annular iron core 1. If the protrusion 6 that supports the load is not deformed by the load and the width of the groove 4 can be increased to a certain extent, one wire-wound conductor 2 can be wound around one groove 4 (see Fig. 7).
In addition, multiple winding conductors 2 are wound to create a winding conductor 2.
The space factor can be improved.

Furthermore, in this embodiment, only the prevention of disconnection of the winding conductor 2 has been explained, but since the disconnection of the winding conductor 2 is prevented, the insulator (not shown) that is normally provided on the annular core 1 is also protected. Needless to say, damage is prevented.

Other embodiments of the invention are shown in FIGS. 9-11. In this embodiment, the secondary winding lb is inserted horizontally into the 1
This is the case when it is installed around the secondary conductor 5 (see FIG. 9). In this case, a grooved spacer 3 (see FIG. 11) was installed inside the annular core 1, and the winding conductor 2 was wound through the entire groove 4 of the grooved spacer 3 (see FIG. 10). By doing this, the dead weight of the secondary winding lb is supported by the protrusion 6 of the grooved spacer 3 installed inside.
As in the case described above, no load is applied to the winding conductor 2, and breakage of the winding conductor 2 can be prevented. In this embodiment, the case where there is one secondary winding lb, that is, one current transformer is explained, but even when multiple secondary windings lb, that is, multiple current transformers are used, one Since the secondary windings lb are arranged side by side in the same way as in the case of a single coil, the only load is its own weight, and the direction in which the load is applied is exactly the same as in the case of a single coil.

As described above, the present invention prevents direct load from being applied to the winding conductor of the secondary winding arranged, so that the load is no longer applied and breakage of the winding conductor is prevented. ,
It is possible to obtain a current transformer that can prevent disconnection of the winding conductor.

[Brief explanation of drawings]

Fig. 1 is a front view of the secondary winding of a conventional current transformer, Fig. 2 is a side view of the secondary winding, and Fig. 3 is the height of the grooved subway of an embodiment of the current transformer of the present invention. , FIG. 4 is a side view of a grooved spacer according to an embodiment, FIG. 5 is a side view of an embodiment of the current transformer of the present invention, and FIG. 6 is a secondary winding of an embodiment of the present invention. FIG. 7 is a side view of the main parts of the secondary winding according to one embodiment, and FIG. 8 is a front view of a grooved spacer attached to the upper and lower surfaces of the annular core according to one embodiment. , FIG. 9 is a side view of another embodiment of the current transformer of the present invention, FIG. 10 is a side view of the secondary winding section of another embodiment, and FIG. 11 is a side view of another embodiment. This is a side view of the grooved spacer installed inside the annular core.

Claims (1)

[Claims] 1. An annular core, a secondary winding made of a winding conductor wound on the outer periphery of the annular core, and a 1st wire inserted vertically or horizontally into the inner hole of the annular core. A current transformer having a secondary conductor, wherein a grooved spacer is provided on at least one surface of the outer periphery of the annular core, and the winding conductor is wound through the groove of the grooved spacer. vessel. 2. Claim 1, wherein a plurality of the secondary windings are stacked around the vertically inserted primary conductor.
Current transformer as described in section. 3. The current transformer according to claim 1, wherein a plurality of the secondary windings are arranged in parallel around the horizontally inserted primary conductor.