SU1416919A1 - Current transducer - Google Patents

Abstract

The invention relates to devices for contactless measurement of the magnitude of large constant and alternating currents. The current sensor contains a closed detachable magnetic core consisting of non-conducting 1 and corresponding pairs of electrically conductive ferromagnetic 2 and 3 parts, measuring coils 4 electrically connected to electrically conducting ferromagnetic parts 2, 3 of the magnetic circuit. A conductive spring is mounted in the conductive part 2, the output of which is electrically connected to the wire 5. The current sensor is simple to install. 1 h. item f-ly, 2 ill.

Description

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The invention relates to electrical measuring equipment, in particular, to devices for contactless measurement of the magnitude of large direct and alternating currents.

The purpose of the invention is to simplify the installation of the sensor.

FIG. 1 shows the proposed current sensor; in fig. 2 — node I in FIG. one.

The current sensor contains a magnetic conductor, closed in a plane A, made of electroconductive 1 and electrically conductive 2, 3 ferromagnetic parts, coils 4 with measuring windings insulated from one another. The coils 4 at the joints along the planes A are connected by wires 5 to a pair of ferromagnetic conductive parts 2, 3 of the magnetic conductor; and the electrically conductive part 3 of the magnetic circuit is electrically connected to the wire 5. The execution of the parts 2 and 3 of the magnetic conductor ferromagnetic, which have direct contact with the non-conductive part 1, reduces the magnetic fluxes of the scattering, while x galvanically electrically conductive binds them together. Thus, parts 2, 3 and spring 6 form a detachable conductive connection. A primary bus 7 with measured current was used as the primary winding of the current sensor. findings

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Compiled A L Bukharaa

Tehred I. VeresKorrektor O. Kravtsova

Circulation 772 Subscription

416919

secondary windings are located on the output connector 8.

The device operates as follows. When the current sensor is installed on the primary bus 7, the spring 6 creates the necessary contact pressure between the electrically conductive parts 2 and 3 located at the ends of the non-conductive parts 1 of the magnetic circuit. As a result, the wires 5 of the coils 4 are connected in series, and the sum signal is fed to the output connector 8.

Claims (2)

1. A current sensor comprising a closed magnetic conductor enclosed by series-connected measuring coils, the common output of which is connected to an output of a current sensor, characterized in that. In order to simplify the installation of the sensor, the magneto conductor is made detachable and matches, it ;,. ib; .i from non-conductive and corresponding pairs of electrically conductive ferromagnetic parts mounted on the ends of each non-conductive part, and from docking coils the conductive ferromagnetic parts are electrically connected. 2. A current sensor according to claim 1, characterized in that the junction points of the pairs of electrically conductive ferromagnetic parts are provided with a contact electrically conductive spring.