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High-voltage three-potential insulated isolated current sensor

A current sensor and insulation isolation technology, applied in the direction of voltage/current isolation, current only measurement, current/voltage measurement, etc., can solve the problems of current sensor with weak load capacity, complicated wiring, and the influence of secondary signal accuracy

Inactive Publication Date: 2016-10-05
武汉电联电力电气技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method makes the wiring complicated, and because the load capacity of the current sensor is very weak, the accuracy of the secondary signal after the external isolation transformer is often greatly affected
Therefore, this method is not commonly used, and is often only used as a special emergency method.

Method used

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with accompanying drawing.

[0015] Such as figure 1 As shown, the high-voltage three-potential insulation isolation current sensor of the present invention includes a high-voltage primary winding 1, a high-voltage insulating layer 2, a ground potential equalizing layer 3, a mounting base 4, a secondary winding 5, a secondary winding shielding layer 6, Secondary outlet terminal 7 , cast insulating layer 8 , ground terminal 9 , iron core 10 , connecting wire 11 , and casing 12 . The high-voltage primary winding 1 is arranged in the middle, and the high-voltage insulating layer 2 is tightly wrapped around the high-voltage primary winding 1 . The iron core 10 is in the form of a ring, its secondary winding 5 is evenly wound on the iron core 10, and the secondary winding shielding layer 6 is evenly wound on the secondary winding 5; then the ground potential equalizing layer 3 is set on the high voltage in...

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Abstract

The invention relates to the field of current sensors, and particularly relates to a high-voltage three-potential insulated isolated current sensor. An iron core is annular, secondary windings are uniformly wound on the iron core, secondary winding shielding layers are wound on the secondary windings, a ground potential voltage sharing layer sleeves a high-voltage insulated layer, and the iron core sleeves the ground potential voltage sharing layer. The ground potential voltage sharing layer is formed by two horn-shaped cylindrical pipes with small diameter ports connected and large diameter ports facing outwardly. Through the electric field uniformity technology, the potential of a high-voltage terminal is isolated from that of a secondary terminal, the potential of a mounting seat is isolated from that of the high-voltage terminal and that of the secondary terminal through the insulated design, and the purposes of meeting mutual three-potential isolation among the potential of the high-voltage terminal, the potential of the mounting point and the potential of the secondary terminal and meeting the insulation requirements can be achieved.

Description

technical field [0001] The invention relates to the field of current sensors, in particular to a current sensor working at three different potentials and requiring the three potentials to be insulated from each other. Background technique [0002] A high-voltage current sensor is an electrical appliance that converts a high-potential large current into a low-potential small current signal. However, in the process of intelligentization of high-voltage electrical appliances, it often occurs that the current sensor is required to be installed at another high-potential position different from the potential of the high-voltage terminal. [0003] The commonly used current sensor secondary outlet terminal is installed on the installation base, the base is usually at ground potential, and the insulation isolation between the secondary outlet terminal and the installation base is very weak. Since it only has the function of isolating the potential of the high-voltage terminal and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R15/14
CPCG01R15/146G01R19/0092
Inventor 刘瑞云倪明珏林弘杰刘常颖刘海洋
Owner 武汉电联电力电气技术有限公司
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