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Method for diagnosing the cause of tripping of an electrical protection device, auxiliary device and electrical system for implementing such a method

An auxiliary equipment and electrical protection technology, which is applied to the parts of the protection switch, electrical components, protection switches, etc., can solve problems such as diagnostic errors and achieve the effect of improving reliability

Pending Publication Date: 2020-04-07
SCHNEIDER ELECTRIC IND SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in some cases the diagnosis made by the auxiliary device may be wrong

Method used

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  • Method for diagnosing the cause of tripping of an electrical protection device, auxiliary device and electrical system for implementing such a method
  • Method for diagnosing the cause of tripping of an electrical protection device, auxiliary device and electrical system for implementing such a method
  • Method for diagnosing the cause of tripping of an electrical protection device, auxiliary device and electrical system for implementing such a method

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Experimental program
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Embodiment Construction

[0045] figure 1 An electrical installation 2 comprising electrical protection equipment 4 and auxiliary equipment 6 is shown. One or more electrical conductors 8 electrically connect the power source 10 to an electrical load 12 .

[0046] The protective device 4 and the auxiliary device 6 are associated with electrical conductors 8 of the installation 2 .

[0047] As an illustrative example, power source 10 includes a generator or a mains type grid.

[0048] For example, the electrical facility 2 is a power distribution facility. One or more conductors 8 enable the transfer of alternating current between the source 10 and the load 12 .

[0049] Depending on the embodiment, the facility 2 may be a single-phase or multi-phase facility.

[0050] In the example shown, three conductors 8 are shown, eg for forming a three-phase grid adapted to supply three-phase current.

[0051] However, to simplify the description, the embodiments are described with reference to only a single...

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PUM

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Abstract

This method for diagnosing the cause of tripping of an electrical protection device includes, after detection by the auxiliary device of a loss of electrical power, determining a type of electrical fault on the basis of recorded values, the determining operation including: comparing, with a first threshold value, the largest value of the maximum intensity of the current from the recorded values for a plurality of measurement intervals preceding the loss of power, a short circuit being diagnosed if the largest value of the maximum intensity is greater than a first threshold value; comparing, with a second threshold value, the largest RMS value of the current from the recorded values, an overload being diagnosed if the largest RMS value is greater than a second threshold value.

Description

technical field [0001] The invention relates to a method for diagnosing the cause of a trip of an electrical protection device. The invention also relates to an auxiliary device and an electrical system for implementing such a diagnostic method. Background technique [0002] Electrical installations typically include one or more electrical protection devices, such as circuit breakers, to interrupt the circulation of electrical current in one or more electrical conductors of the installation upon detection of an electrical fault in the installation, such as a short circuit or an overload. [0003] To this end, the protection device includes a tripping device adapted to detect one or more electrical faults and to switch the protection device to an electrically disconnected state in response. [0004] When a protective device trips, it is desirable to be able to identify the type of electrical fault that caused the trip, as this facilitates the management and supervision of el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/00G01R31/52H01H71/125H01H71/04H01H2071/042G01R31/3274G01R31/3275
Inventor M.亨纳金W.优塞夫
Owner SCHNEIDER ELECTRIC IND SAS