JPH0245467U

JPH0245467U -

Info

Publication number: JPH0245467U
Application number: JP12368288U
Authority: JP
Priority date: 1988-09-21
Filing date: 1988-09-21
Publication date: 1990-03-28

Description

[Brief explanation of drawings]

第１図は本考案の実施例を示す微小電流検出装
置の全体斜視図、第２図は第１図図示微小電流検
出装置の正面図、第３図は第２図図示微小電流検
出装置の右側面図、第４図は第１図図示微小電流
検出装置の測定例の一実施例を示す図、第５図は
第１図図示微小電流検出装置の測定例の他の実施
例を示す図である。１……微小電流検出装置、２，３……クランプ
式変流器、４……本体、５，６……コア、７，８
……押しボタン、９，１０……電線。 Fig. 1 is an overall perspective view of a microcurrent detection device showing an embodiment of the present invention, Fig. 2 is a front view of the microcurrent detection device shown in Fig. 1, and Fig. 3 is a right side view of the microcurrent detection device shown in Fig. 2. 4 is a diagram showing one embodiment of the measurement example of the microcurrent detection device shown in FIG. 1, and FIG. 5 is a diagram showing another embodiment of the measurement example of the microcurrent detection device shown in FIG. 1. be. 1...Minute current detection device, 2, 3...Clamp type current transformer, 4...Main body, 5, 6...Core, 7, 8
...Push button, 9,10...Electric wire.

Claims

[Claims for Utility Model Registration] (1) Two current transformers are provided adjacent to each other, each consisting of a core formed in a ring shape and divided into parts that can be clamped, and a coil wound around the core. , a minute current detection device that measures a minute current flowing in a current by using the two current transformers at the same time. (2) The various characteristics of the two current transformers installed adjacent to each other are approximately equal, and the magnetic flux induced in the core of the current transformer by the current measured in one of the two current transformers is The direction of the current induced by the magnetic flux generated in the current transformer core by the current measured in the other of the two current transformers is measured so that the direction of the current is negative. 2. The minute current detection device according to claim 1, wherein the current flowing in the wire to be measured is measured by arranging the wire and determining the difference between the outputs of the respective current transformers. (3) The various characteristics of the two current transformers installed adjacent to each other are made approximately equal, and a wire through which the current to be measured is flowing is clamped to one of the two current transformers, and the current flowing through the wire is clamped. , measure the current generated by the magnetic field generated externally by the two current transformers, and compare the current value measured by one current transformer and the other current transformer. 2. The minute current detection device according to claim 1, wherein the current flowing in the wire to be measured is measured based on the difference between the current value and the current value thus measured.