dispositivo de supressão de corrente de irrupção de excitação e método de supressão de corrente de irrupção de excitação

An excitation inrush current suppression device (6) for suppressing excitation inrush currents flowing through a breaker (2) of the three-phase collective operation type for opening and closing connection between a power supply bus bar (1) and a modified Woodbridge connection transformer (3) effecti...

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Bibliographic Details
Main Authors KEI KAWASAKI, SHIRO MARUYAMA, NORIYUKI NAGAYAMA, MINORU SAITO, TADASHI KOSHIZUKA
Format Patent
LanguagePortuguese
Published 21.02.2017
Subjects
CUTTING
DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING,CUTTING-OUT, STAMPING-OUT OR SEVERING
HAND CUTTING TOOLS
PERFORMING OPERATIONS
SEVERING
TRANSPORTING
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Summary:An excitation inrush current suppression device (6) for suppressing excitation inrush currents flowing through a breaker (2) of the three-phase collective operation type for opening and closing connection between a power supply bus bar (1) and a modified Woodbridge connection transformer (3) effectively grounded is configured to measure a three-phase AC voltage of the power supply bus bar (1) to calculate prospective magnetic fluxes of the transformer (3), and to measure a three-phase AC voltage on the transformer (3) side to calculate residual magnetic fluxes of the transformer (3) after shutoff, so as to set the breaker (2) closed when polarities of the prospective magnetic fluxes respectively agree with polarities of the residual magnetic fluxes in all of the phases respectively.
Bibliography:Application Number: BR20141101852