Electric current transducer capable of being installed on line and manufacturing method

Abstract

The invention relates to an electric current transducer capable of being installed on line and a manufacturing method. The electric current transducer capable of being installed on line comprises a ring-shaped magnetic core, coils, a signal processing circuit and a display device, wherein the ring-shaped magnetic core is used for inducting magnetic fields which surrounds at least two to-be-measured wires, the ring-shaped magnetic core is reeled and made of magnetism strips surrounding the to-be-measured wires, the to-be-measured wires after reeled are all located inside the ring-shaped magnetic core, wherein under the conditions of no current leakage, space electromagnetic fields of at least to-be-measured wires are zero, the coils are arranged on the ring-shaped magnetic core in a reeling mode and used for inducting the magnetic fields in the ring-shaped magnetic core and producing current signals to output to the signal processing circuit, the signal processing circuit is used for receiving the current signals and processing the current signals and calculating out current values of the current signals to output to the display device, the display device is used for receiving and displaying the current values. When the electric current transducer is installed, outage does not needs to be switched out, on-line detection can be achieved, meanwhile, the ring-shaped magnetic core is composed of the multi-layer magnetism strips, and the manufactured ring-shaped magnetic core is small in magnetic resistance, and then measurement accuracy and distinguishability can enabled to be high.

Description

technical field [0001] The invention relates to the field of DC system insulation leakage current detection in a power system, in particular to a current sensor capable of online detection of weak current in a wire and a manufacturing method thereof. Background technique [0002] A sensor is a detection device that can feel the measured information, and can convert the detected information into electrical signals or other required forms of information output according to certain rules, so as to meet the needs of information transmission, processing, storage, display, recording and control requirements. A current sensor is a sensor that senses the measured current and converts it into a usable output signal. It is simple and fast to extract the current signal with the current sensor, which is a commonly used technology in the field of modern electronics and electromagnetic technology. [0003] Distinguish from the installation process, the current sensor is divided into the...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the current transformer accuracy caused by the increase of the reluctance of the current transformer due to the presence of an air gap in the connection part of the caliper current transformer and the plug-in high-precision current transformer in the prior art. and low resolution technical problems, thereby providing a current sensor capable of online detection of weak currents in wires and a manufacturing method thereof

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