JPS60152964A - Feedthrough current transformer test equipment - Google Patents

Abstract

PURPOSE:To test a circular through type current transformer by arranging it on a plurality of U-shaped conductors, which then, are connected sequentially with connection conductors so that the transformer will be wound with the U-shaped conductors to form a primary circuit. CONSTITUTION:Bottoms 10c of U-shaped conductors 10 (10-1-10-8) having terminals 10a and 10b at the tip thereof are housed as fitted into grooves 12 formed radially on an insulated support base 11. Then, the circular part of a through type current transformer 13 is inserted through the separate conductors 10 from the open side thereof 10 arranged to place the transformer on the insulated base 11. Then, a terminal 10b inside an adjacent conductor 10-1 is connected to a terminal 10a outside a conductor 10-2 with a connector 15. In this manner, a connection is accomplished sequentially up to the conductor 10-6 with the connector 15. Then, a testing power source 16 is connected between the terminal 10a of the conductor 10-1 and the terminal 10b of the conductor 10-6. Therefore, as a primary circuit can be formed in such a manner as to wind the through type current transformer with the conductors 10, a through type current transformer of a large rated current can be tested.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a feed-through current transformer testing device, and more particularly to improvements in means for attaching a primary conductor for passing a large primary current.

[Technical background of the invention and its problems]

Since a feed-through current transformer does not have a primary circuit, the primary conductor for testing is passed through or wound around the feed-through current transformer, and the primary circuit is configured to obtain a specified ampere turn. There is. In a feed-through current transformer with a large current rating, a primary circuit with a large ampere turn is obtained by wrapping a conductor around the feed-through current transformer or by passing the current transformer through a large current power supply circuit. However, in the method of winding a conductor around a feed-through current transformer, as the current capacity and number of turns of the conductor increase, the thick conductor must be wound many times, resulting in very poor workability. In addition, the method of passing a feedthrough current transformer through a large current power supply circuit has problems that need to be improved, such as the power supply equipment becomes large and expensive, and the -order conductor becomes large, making it difficult to assemble the current transformer under test. Ta.

[Purpose of the invention]

The present invention has been made in consideration of the above points, and its purpose is to test 1 through-type large current current transformers: test of through-type current transformers that can easily configure the primary circuit to be used. The goal is to provide equipment.

[Summary of the invention]

In order to achieve this object, according to the present invention, the bottoms of a plurality of U-shaped conductors each having a connection terminal at the tip are installed radially evenly spaced on a support insulating stand, and these U-shaped An annular current transformer is inserted into the conductor, and a selected number of adjacent U-shaped conductors are sequentially connected to form a turn with respect to the annular current transformer to form a primary winding. is formed, and a test power source is connected to both ends of this secondary winding, thereby making it possible to easily configure the negative secondary circuit.

[Embodiments of the invention]

An embodiment of the through-type current transformer of the present invention will be described below with reference to FIGS. 1 to 3. 1 and 2, there are a plurality of U-shaped conductors 10 having terminals 10m and 10b at their tips, for example, six U-shaped conductors 10-1.・・・
・, 10-a each bottom 10 support insulation □ stand 11
It is fitted into a groove 12 formed radially in the area. In this manner, the respective U-shaped conductors 10 are arranged radially on the supporting insulating base 11 with the open side of the U-shaped conductor 10 facing upward, that is, with the respective terminals 10m and 10b facing upward.

The through-hole current transformer 13 to be measured is formed in an annular shape. Although not shown, this feedthrough current transformer 13 is usually formed by covering an annular core with an insulating material, winding a conducting wire in a toroidal manner on top of the core, and then winding an insulating material on top of the core for insulation treatment. It is constructed by providing a secondary terminal on a toroidally wound conducting wire.

The annular portion of this through-type current transformer 13 is placed on the supporting insulating base 11 so as to be inserted into each U-shaped conductor 10 from the open side of the arranged U-shaped conductors 10.

Then, the inner terminal of one U-shaped conductor and the outer terminal of the U-shaped conductor adjacent to one side are sequentially connected by a connecting conductor to form a primary circuit wound by each U-shaped conductor, and the connecting portion is Connect the test power supply between the open terminals such as the outer terminal of the U-shaped conductor and the inner terminal of the U-shaped conductor of the connecting wire.

The above connection will be further explained with reference to FIG. 1. For example, the inner terminal 10b of the U-shaped conductor 10-1 and the outer terminal 10b of the adjacent U-shaped conductor 10-2 on one side. and are connected by a connecting conductor 15 as shown by the dotted line. followed by U
The inner terminal 10b of the shaped conductor 10-2 and the U-shaped conductor 10
-3 outer terminal 10. and are connected by a connecting conductor 15. In this way, connect the U-shaped conductor 10-
・Connect in sequence by the connecting conductor 15. and the outer terminal 10 of the U-shaped conductor 10-1. and U-shaped conductor 10-
The test power supply 16 is connected between the inner terminal 10b of the 6 and the inner terminal 10b.

Further, the connecting conductor 15 is formed by bending a conductor plate into a certain shape, as shown in FIGS. 3(a) and 3(b), and
A hole 15b is formed in each of the holes 5a.

Next, the effects of the present invention will be explained. An annular through-type current transformer 13 is arranged on a plurality of U-shaped conductors 10 arranged as described above, and the U-shaped conductors 10 are sequentially connected by connecting conductors 15, and the U-shaped conductors 10 form a through-type current transformer. Since the primary circuit can be formed by winding the conductor in the same manner as the number of U-shaped conductors connected, it is possible to easily form the primary circuit with the number of turns equal to the number of connected U-shaped conductors. Therefore, a primary circuit in which a conductor with a large current capacity is wound many times can be easily obtained, and a feed-through current transformer with a large current rating can be easily tested.

In the embodiment of the present invention, six U-shaped conductors were connected to form a six-turn primary circuit, but if necessary, the U-shaped conductors could be arranged evenly to match this. Of course, a primary circuit corresponding to an arbitrary number of turns can be formed by connecting with a connecting conductor.

[Effects of the Invention] According to the present invention described above, it is possible to provide a feed-through current transformer testing device that can easily obtain a primary circuit in which a conductor with a large current capacity is wound multiple times.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the feedthrough current transformer testing device of the present invention, and FIG.
The figure is a sectional view taken along the line ■-■ in Figure 1, Figure 3 (a),
(bl indicates the connection conductor in Figure 1, Figure (a) is a plan view,
Figure (b) is a side view. 10.10-x*..., 10-,...U-shaped conductor. 10 a y 10 b...terminal, 10c...bottom 11...support insulating stand, 12--groove 13...through type current transformer, 15...connecting conductor 16...
- Test power supply. Agent Patent Attorney Inoue - Male

Claims (1)

[Claims] The bottom portions of a plurality of U-shaped conductors having terminals at their tips are arranged radially at approximately equal intervals on a support insulating table, and an annular feedthrough current transformer is installed to be inserted into the plurality of U-shaped conductors. ,
A winding start (two corresponding U-shaped conductors adjacent to one side of the U-shaped conductor to one side of the U-shaped conductors adjacent to each other is selected to be wound around the feed-through current transformer) A through-type current transformer testing device, characterized in that the number of through-type current transformers is connected by connecting conductors in sequence, and a primary circuit is formed by the U-shaped conductor corresponding to the end of the winding and the U-shaped conductor corresponding to the beginning of the winding.