DISPOSITIVO DE MEDICAO DAS CORRENTES DE FASE DE UMA INSTALACAO TRIFASICA

The invention relates to a system using Rogowski coils to measure the phase currents in a three-phase installation. Each coil (1, 2, 3) is connected firstly to a corresponding operational amplifier (10, 20, 30) connected as an integrator, and secondly to a corresponding inverter (100, 200, 300) whos...

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Bibliographic Details
Main Author JEAN-PIERRE DUPRAZ
Format Patent
LanguagePortuguese
Published 17.04.1990
Edition5
Subjects
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:The invention relates to a system using Rogowski coils to measure the phase currents in a three-phase installation. Each coil (1, 2, 3) is connected firstly to a corresponding operational amplifier (10, 20, 30) connected as an integrator, and secondly to a corresponding inverter (100, 200, 300) whose output is connected to the inputs of the integrating amplifiers of the other two phases. With appropriately selected resistance values, mutual interference effects may be cancelled. The system is suitable for measuring phase currents in an installation housed in a cabinet or cubicle.
Bibliography:Application Number: BR19898903689