Electric current measuring arrangement, current sensor, electric tripping device and circuit breaker using such a current measuring device

The device has three coils (2) connected in series and forming a closed polygonal outline designed to surround a conductor (7) to perform current measurement. The local inductance of one of ends of the coils is greater than the local inductance towards a central part of the coils. The coils' en...

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Bibliographic Details
Main Authors TOTI-BUTTIN FREDERIC, BUDILLON GILLES, HOUBRE PASCAL, BUFFAT SEBASTIEN
Format Patent
LanguageChinese
English
Published 15.06.2011
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
INDUCTANCES
MAGNETS
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TESTING
TRANSFORMERS
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Summary:The device has three coils (2) connected in series and forming a closed polygonal outline designed to surround a conductor (7) to perform current measurement. The local inductance of one of ends of the coils is greater than the local inductance towards a central part of the coils. The coils' ends comprise of larger number of turns of wire per unit length than the number of turns of wire per unit length towards central part of the coils. - An INDEPENDENT CLAIM is also included for an electric trip unit comprising a processing unit connected to a current measuring device.
Bibliography:Application Number: CN200510066737