| 摘要 |
The scope of the invention is to make a more simple construction of the current transducer currently used widely in circuit breakers for application within the scope of low voltage directive. The invention removes the energy coil from the current transducer and adds additional features and requirements to control circuit in order to keep the protective functionality of an automatic circuit breaker. The benetit of the solution is a highly improved performance with respect to harmonics and higher frequency in the low voltage grid. The higher performance will in addition yield a higher rel iability when the circuit breaker is mounted into a grid environment with high frequency pollution. |
