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Current sensor

A current transformer, current technology, applied in the direction of inductors, circuits, transformers, etc., can solve problems such as no discussion

Active Publication Date: 2018-07-31
HM POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existence of an electric field originating from the core in contact with the high-voltage conductor, and how to control this electric field to avoid partial discharges is not discussed

Method used

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Embodiment Construction

[0028] according to figure 1 The current transformer includes an iron core 13 surrounding a high voltage conductor 12, and a tubular insulator 1 including a secondary winding. A tubular insulator provides high voltage insulation between the core and the secondary winding. In the illustrated embodiment, the insulator covers a portion of the core, leaving a portion of the core in contact with the conductor. Therefore, the core receives the same potential as the high voltage conductor. In an embodiment, the core is embedded in a thin protective coating and thus receives a slightly lower voltage potential than the high voltage conductor. The core comprises an openable uniform ring of magnetizable material. The expression uniform should be understood to mean that the ring comprises the same material everywhere and preferably the same cross-section. The ring may have any geometric form, but is preferably circular.

[0029] The insulator 1 comprises a middle section 2 carrying the...

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Abstract

A current transformer for measurement of a high voltage power line (12) comprising an openable magnetisable ring core (13) comprising a plurality of iron strips encircling the power line and a secondary winding (9) for sensing a current in relation to the current of the high voltage power line. The core (13) comprises overlapping ends (17a, 17b) having an overlapping area (14), and the core receives high voltage potential.

Description

technical field [0001] The invention relates to the measurement of current in power lines. More precisely, the invention relates to devices and methods for the measurement of current in high power distribution lines. In particular, the invention relates to sensors for current measurement. In particular, the invention relates to current transformers for high voltages. [0002] The expression "high voltage distribution lines" should be understood as air-insulated power lines for power distribution. Preferably, such power lines carry electrical power in the range of 10 to 40 kilovolts (kV). Background technique [0003] A common device for current measurement of high voltage electrical conductors is a current transformer with a primary winding, a circular magnetizable core and a secondary winding. An alternating current in the primary winding (which is the power line to be measured) generates an alternating magnetic field in the core, which then induces an alternating curre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F38/30
CPCH01F38/30H01F2038/305
Inventor B·莫里兹
Owner HM POWER