| 摘要 |
A device for current limitation and protection against faults in the load current fed to an electrical load, in the form of an electrical apparatus or installation, a fault current limiter. The fault current limiter is electrically connected in series with the load to be protected in a main circuit for power supply of the load. The current limiting element is electrically connected to a circuit for current injection. The circuit for current injection comprises a capacitor connected in series with a switch. A control unit with sensors for monitoring the load current in the main circuit and control means are arranged to control and operate the switch in the circuit for current injection based on changes in the properties of the load current in the main circuit, such that upon detection of a fault the capacitor is discharged through the current limiting element. |
