| 摘要 |
<p>The method involves separating an electric arc (62) formed in two secondary electric arcs (64, 68) between main electrodes (24, 28) and an intermediate electrode (26). A semiconductor switch e.g. insulated gate bipolar transistor (IGBT) or FET, is arranged in a normally open state, where the switch connects the intermediate electrode to one of the main electrodes. The switch is closed for extinguishing the secondary electric arc. The switch is opened for extinguishing the other secondary electric arc. Independent claims are also included for the following: (1) a method for protecting an electric installation (2) a device for protecting an electric installation.</p> |
