| 摘要 |
<p>1. Route section test equipement for overhead lines (1) supplied through route section switches (5), particularly for direct current overhead lines of electric railways, in which prior to the route section switch (5) being switched on again, a test current sources is applied by means of a switching equipement to the overhead line otherwise free of voltage, wherein the resultat test current serves as a criterion for the freedom from short-circuit of the section and for the route section switch (5) being swtiched on again, characterized thereby, that a controllable rectifier (7) serves as switching equipement, is connected directly to the overhead line (1) and through variable firing increase the test voltage from zero rising in a timing rhythm up to a test current limit value, wherein the renewed switching-on of the route section switch (5) is then dependent on the course of the test current below a critical value of rise.</p> |
