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Device for measuring the intensity of an electric current and electric appliance including such device

一种电流强度、强度的技术，应用在测量装置、测量电变量、电压/电流隔离等方向，能够解决测量动态范围有限、不能用补充应用、测量出错等问题

Inactive Publication Date: 2010-08-11
SOCOMEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the proximity of electrical conductors inevitably induces interfering magnetic fields, which can lead to errors in measurements
Furthermore, the known devices are specific to a specific measurement application and therefore have a limited measurement dynamic range
Therefore, these known devices cannot be used for supplementary applications such as energy metering and / or overcurrent protection, for which the measured current range is multiplied by a factor of at least 10

Method used

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  • Device for measuring the intensity of an electric current and electric appliance including such device
  • Device for measuring the intensity of an electric current and electric appliance including such device
  • Device for measuring the intensity of an electric current and electric appliance including such device

Examples

Experimental program
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Embodiment approach

[0036] Figures 3 to 4 A preferred embodiment of the measuring device 1 according to the invention is described, which is to be installed in an electrical device 10, such as figure 2 shown. The electrical device 10 can be an electrical disconnecting device such as a switch, a commutator switch, an automatic circuit breaker, single-phase or multi-phase, with or without a neutral wire. According to the example shown, the electrical device 10 comprises 4 conductors 2: three phases and a neutral. The space between two adjacent conductors 2 A Smaller, for example between 15 and 50 mm depending on the type of device, so that only a small amount of space is left available for placing a measuring device 1 on each electrical conductor 2 . Likewise, the available height H is also limited, for example between 30 and 80 mm, due to the limitation of the connection of the conductor 2 to upstream and / or downstream circuits or electrical equipment.

[0037] The measuring device 1 mounted...

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PUM

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Abstract

The invention relates to a device for measuring the intensity of an electric current, that has a simple and economical design and offers a high measurement dynamic compatible with combined measurement, protection and energy metering applications, that is particularly insensitive to parasitic fields and to the position of the electric conductor to be measured, and that can be opened for facilitating the placement thereof. The measuring device (1) defines about a conductor (2) a closed path (C) for the circulation of the lines of magnetic field induced by said current to be measured, the path being formed by two plates (30) having a high magnetic permeability separated by two large air gaps (E) closed by two identical and opposed electric coils (4) connected in series for supplying a voltage proportional to the derivative of the intensity (I) of the current to be measured. This measurement device (1) has reduced overall dimensions and is compact so that it can be easily integrated into any type of electric appliance.

Description

technical field [0001] The invention relates to a current intensity measuring device, which comprises: at least one magnetic circuit, which is located near an electric conductor through which the current to be measured passes, and is used to guide the magnetic field induced by the current to be measured around the conductor; at least one An electrical coil associated with said magnetic circuit for outputting a voltage proportional to the derivative of the amperage to be measured; at least one module for processing this voltage for outputting a measured amperage value. The invention also relates to an electrical device equipped with such a device, which may be a switch, a commutator switch, a disconnecting device of the automatic circuit breaker type, or any other device of the same type, single-phase, multi-phase, with or without neutral wire. Background technique [0002] There are various devices that can measure the intensity of an alternating current passing through an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R15/18
CPCG01R15/183G01R15/186G01R15/181
Inventor C·科恩
Owner SOCOMEC
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