JPH0362009B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an annular current transformer, and particularly relates to an annular current transformer device suitable for use in an annular current transformer having one electrical turn of the primary winding. .

[Prior art]

A conventional toroidal current transformer with one turn of primary winding has
A case in which a secondary coil in which only a secondary winding is wound around a circular iron core is provided, and a primary conductor is wired through the inner ring of this secondary coil to configure a circular current transformer with one turn on the primary side. In some cases, an annular current transformer is constructed by winding a primary winding and a secondary winding of one turn on the same annular core. In the former case, it is necessary to hold and secure the main body and the secondary wire ring, and to hold and secure the secondary wire ring and the penetrating wiring part, and in the latter case, the fixation with the main body is the same as the former, but Since the primary winding has only one turn, relatively thick conductor wire is used in terms of current carrying capacity.
Winding work is difficult.

[Purpose of the invention]

An object of the present invention is to provide an annular current transformer device that is easy to manufacture.

[Summary of the invention]

The present invention provides a core rod as a core of a mechanism for holding and fixing an annular secondary wire ring in a portion corresponding to a through-wiring portion, and makes the core rod function as a primary winding by also serving as a through-hole conductive function. The idea is to make manufacturing easier by using the annular coil holding mechanism to also serve as the primary winding.

[Embodiments of the invention]

Examples of the present invention will be described below.

FIG. 1 shows an embodiment of the invention.

In the figure, an annular secondary coil 4 in which an electrical secondary winding 2 is wound around an annular core 1 and secondary terminals 3 are provided at the beginning and end of the winding, and a cone-shaped secondary wire ring 4 with a penetrating wire in the center. It consists of a holding plate 6 provided with holes 5, a conductive holding rod 8 provided with electrical terminals 7 at both ends, an insulator mounting plate 10 provided with mounting screw holes 9, and a primary conductor 11, Holding plates 6 are provided on both sides of the annular secondary wire ring 4 so as to hold the wire ring from both sides with conical bowl-shaped parts at the corners of the inner ring of the wire ring (in the case of a mounting plate with one side flat, The mounting plate side of the holding plate 6 may be omitted),
The holding rod 8 is passed through both holes 5 and the annular secondary wire ring 4, and is screwed into the mounting screw hole 9, and tightened with an appropriate torque to hold and secure the annular secondary wire ring 4 to the mounting plate 10.
The holding rod 8 also connects the conductor 11 of the primary circuit of the current transformer to the electric terminals 7 at both ends to conduct electricity, and connects the primary electric terminal 7 of the holding rod 8 and the secondary side terminal 3 of the annular secondary coil 4. This is an annular current transformer device that constitutes a current transformer with one turn on the primary side between the two. According to an embodiment of the present invention, a current transformer includes an annular secondary coil wound with only a large number of secondary windings, and a primary coil in which a coil holding mechanism and a primary winding are integrated. An inexpensive annular current transformer device is obtained.

FIG. 2 shows another embodiment of the present invention, and shows an application example in which a plurality of annular current transformers each having one turn on the primary side are provided. A large number of annular secondary wire rings are arranged side by side through a holding plate 6 in accordance with the above-mentioned configuration, and a holding rod 8 is passed through the inner ring portion to simultaneously hold and fix the large number of wire rings together, and each annular secondary wire By simultaneously penetrating the rings, a plurality of annular current transformer devices according to the embodiment described above can be constructed in one piece.

〔Effect of the invention〕

As explained above, according to the present invention, it can be easily manufactured.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional structural explanatory diagram showing one embodiment of the present invention, and FIG. 2 is a cross-sectional structural explanatory diagram showing an applied example of the present invention. DESCRIPTION OF SYMBOLS 1... Annular iron core, 2... Secondary winding, 3... Secondary side terminal, 4... Annular secondary wire ring, 5... Hole, 6... Holding plate, 7
…Electrical terminal, 8…Holding rod, 9…Mounting screw hole, 10
...Mounting plate, 11...Primary conductor.

Claims (1)

[Claims] 1 In a ring current generator in which an electrical primary winding and a secondary winding are wound around a ring core, and the number of turns of the primary winding is 1 turn, a ring secondary winding in which only the secondary winding is wound around the ring core Cone-shaped holding plates are provided on both sides of the coil, and a holding rod of the conductor is passed through the inner center of the annular secondary coil and the center of the holding plate, and the annular secondary coil is held between the holding plates. 1. An annular current transformer device, characterized in that the holding rod of the annular secondary coil holding mechanism doubles as a primary winding of the current transformer.