| 摘要 |
A test device includes a trainline connector for connecting the test device to a car trainline to which the electropneumatic brake device is connected and includes a power port to receive power for the trainline at a first voltage. A power switch selectively connects the power port to the trainline connector. A test switch selectively connects a test voltage smaller than the first voltage to the trainline connector. A sensor senses an electrical parameter of the trainline. A controller a) initially controls the power switch to disconnect the power port from the trainline connector, b) subsequently controls the test switch to connect the test voltage to the trainline connector and c) if the sensor senses an electrical parameter indicative of an acceptable trainline, controls the test switch to disconnect the test voltage from the trainline connector and controlling the power switch to connect the power port to the trainline connector.
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