MAGNETIZING INRUSH CURRENT SUPPRESSION DEVICE

WIPO Patent Application WO/2013/015356

A1

Provided is a magnetizing current inrush suppression device (6) for suppressing a magnetizing inrush current in a three-phase concurrently operating circuit breaker (2) that opens and closes a connection between a power source bus (1) and an effectively-grounded modified Woodbridge-connected transformer (3), wherein a three-phase alternating current voltage of the power source bus (1) is measured, the steady-state magnetic flux of the transformer (3) is calculated, a three-phase AC voltage on the transformer (3) side is measured, a residual magnetic flux of the transformer (3) after being shut down is calculated, and, when the polarity of the steady-state magnetic flux and the residual magnetic flux matches in all phases, the circuit breaker (2) is closed.

KAWASAKI KEI (JP)
KOSHIZUKA TADASHI (JP)
MARUYAMA SHIRO (JP)
SAITO MINORU (JP)
NAGAYAMA NORIYUKI (JP)

PCT/JP2012/068959

January 31, 2013

July 26, 2012

Click for automatic bibliography generation  

TOSHIBA KK (JP)
KAWASAKI KEI (JP)
KOSHIZUKA TADASHI (JP)
MARUYAMA SHIRO (JP)
SAITO MINORU (JP)
NAGAYAMA NORIYUKI (JP)

H01H33/59; H01H9/54

WO2008065757A1

2008-06-05

JPH08230523A	1996-09-10
JPH03132436A	1991-06-05
JP2002075145A	2002-03-15
JP2008160100A	2008-07-10
JP2008140580A	2008-06-19

JOHN H. BRUNKE ET AL.: "Elimination of Transformer Inrush Currents by Controlled Switching -Part I: Theoretical Considerations", IEEE TRANSACTIONS ON POWER DELIVERY, vol. 16, no. 2, April 2001 (2001-04-01), pages 276 - 280
See also references of EP 2738784A4

KURATA, Masatoshi et al. (JP)
Masatoshi Kurata (JP)

View/Download PDF      PDF Help

Previous Patent: METHOD OF MANUFACTURING OXIDE CERAMIC CIRCUIT BOARD, AND OXIDE CERAMIC CIRCUIT BOARD

Next Patent: LIGHT SOURCE DEVICE