| 摘要 |
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. |
