JPH0434724U

JPH0434724U -

Info

Publication number: JPH0434724U
Application number: JP7642590U
Authority: JP
Priority date: 1990-07-16
Filing date: 1990-07-16
Publication date: 1992-03-23

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す定格一次電
流の小さいものの概略斜視図、第２図は第１図の
線−の断面図、第３図は定格一次電流の大き
いものを示す概略斜視図、第４図は第３図の線
−の断面図、第５図は従来の定格一次電流の大
きいものを示す概略斜視図、第６図は定格一次電
流の小さいものを示す概略斜視図である。図において、１は主回路導体、２Ａは成層断面
積の増した成層鉄心、２Ｂは成層断面積の減じた
成層鉄心、３Ａは巻数の減じた二次コイル、３Ｂ
は巻数の増した二次コイルを示す。なお、各図中
同一符号は同一または相当部分を示す。 Fig. 1 is a schematic perspective view of an embodiment of this invention with a small rated primary current, Fig. 2 is a sectional view taken along the line - in Fig. 1, and Fig. 3 is a schematic perspective view showing an example of a large rated primary current. Figure 4 is a sectional view taken along the line - in Figure 3, Figure 5 is a schematic perspective view showing a conventional device with a large rated primary current, and Figure 6 is a schematic perspective view showing a conventional device with a small rated primary current. be. In the figure, 1 is the main circuit conductor, 2A is a laminated iron core with an increased laminated cross-sectional area, 2B is a laminated iron core with a decreased laminated cross-sectional area, 3A is a secondary coil with a reduced number of turns, and 3B is a laminated iron core with a decreased laminated cross-sectional area.
indicates a secondary coil with an increased number of turns. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Scope of claim for utility model registration] A laminated iron core into which the main circuit conductor of the circuit breaker is inserted;
It has a secondary coil wound around this stratified iron core,
In a current transformer for a circuit breaker in which a constant secondary output current can be obtained from the secondary coil, if the rated primary current of the circuit breaker is large, the number of laminated iron cores is reduced to reduce the stratified cross-sectional area, and the secondary coil has a large rated primary current. Increase the number of turns of the secondary coil, and conversely, if the rated primary current of the circuit breaker is small,
The number of laminated iron cores is increased to increase the stratified cross-sectional area, and the number of turns of the secondary coil is decreased. By doing so, the rated primary current can be adjusted in the limited current transformer installation space of the circuit breaker. A current transformer for circuit breakers that can be installed without any waste.