| 摘要 |
<p>Device for evaluating line tests of an outgoing power line comprising a busbar (3) for feeding an alternating voltage to a contact wire (5) connected to the busbar via a main breaker (9), and an equipment (1) for test energizing the power line, which test equipment comprises a test resistance (2) connected between the busbar and the contact wire and a test breaker (7) for energizing the test resistance with the alternating voltage from the busbar. The device is adapted to record the voltage between the contact wire (5) and earth during the test energizing and to determine at least one characteristic for the shape of the voltage curve based on the recorded voltage and to determine whether or not the power line is short-circuit based on the determined characteristic.
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