Flexible coil current transformer and production method thereof

Abstract

The invention provides a flexible coil current transformer and a production method thereof. The method comprises the following steps: processing silicone rubber composite into a flexible skeleton; winding enamelled wires on the flexible skeleton; winding compensating turns on the flexible skeleton; letting the primary sides of the wound enamelled wires go through the rated current for test; arranging an insulating layer on the tested and qualified flexible skeleton with the enamelled wires; arranging a shielding layer on the outer part of the insulating layer; welding an output shielding wire on one end of the shielding layer; retesting output signals of a coil; and arranging a low-voltage injection insulating protective layer on the outer part of the shielding layer. The flexible coil current transformer provided by the invention is flexible in structure, can be opened and also can be measured randomly in small space without breaking circuits. The installation is simple and rapid, and the output signals can be rapidly connected to an oscilloscope, a data recorder or a multimeter through a connector.

Description

technical field [0001] The invention relates to the technical field of electric equipment, in particular to a flexible coil current transformer and a manufacturing method thereof. Background technique [0002] Current transformers are an important part of power systems. The accuracy and reliability of its sensing measurement play a fundamental role in the monitoring, analysis and control of power systems, especially for the large capacity, high voltage, miniaturization and digital automation of power systems in metallurgical, chemical and power generation industries. The continuous improvement of requirements makes the volume of traditional transformers larger and larger, the insulation structure becomes more and more complicated, and the difficulty of manufacturing becomes higher and higher. At the same time, the traditional transformers have problems such as hysteresis, magnetic saturation, secondary non-open circuit, low linearity, small static and dynamic accuracy range...

AI Technical Summary

Problems solved by technology

[0004] At present, the traditional electromagnetic current transformer also has a method of opening an air gap on the iron core magnetic circuit. By increasing the reluctance and reducing the residual magnetism, it will not be saturated when the transient large current is present. However, because it is still inductive, it will Affects the waveform of the measured current, cannot truly reflect the signal characteristics, and the structure size is large and complex, which is not easy to install

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