| 摘要 |
<p>The purpose of the invention is to create a switch (4), by means of which formation of an arc due to e.g. a defect of a conductor or due to a contact between conductors could be detected in a DC electric current, and prompt interrupting such circuit without generating an excess current, wherein such switch (4) would have to consist of exclusively such components and circuit, which are able to operate without any supplemental voltage source. A switch according to the invention comprises an interrupter (40), which is controlled by means of a control mechanism (41), which is actuated by a residual current circuit breaker (42), which is controlled and fed by means of a passive electronic circuit (43), which is serially connected herewith and which is on the other hand serially connected with a secondary coil (442) of a differential i.e. current transformer (44), which is by means of its primary coil (441) via appropriate conductor (211) serially connected with a capacitor (45).</p> |
