DC600V main line on-line insulation monitoring device

Abstract

The invention relates to a DC600V main line on-line insulation monitoring device, which comprises a voltage sensor for monitoring the voltage of at least one power supply main line, and a voltage sensor for monitoring the voltage to ground of a positive line of at least one power supply main line, wherein the voltage signals monitored by the voltage sensors are transmitted to a PLC control system, the PLC control system is used for processing the monitored information, and the result is displayed on a display. The on-line test can be carried out to the service voltage and insulation of the DC600V line, and when the DC600V main line on-line insulation monitoring device works in a train garage, the insulation resistance of the main line can be detected through a ground power supply to ensure the out-garage state of the train, so as to provide support for ensuring driving safety; whether the train is insulated can be judged after a locomotive is used, and meanwhile, the power supply quality of the locomotive can be detected; all the data can be checked in real time and replayed, also can be dumped via a CF card, and read and printed through a groundbased computer; and the data can be stored for a long term (first in and first out, 30 days) without frequent downloading.

Description

technical field [0001] The invention relates to a leakage detection device for a railway passenger car, in particular to an on-line insulation monitoring device for a DC600V trunk line which is suitable for an electric locomotive or a ground power supply system or a vehicle using a midpoint grounding technology. Background technique [0002] Compared with the AC380V provided by the generator car, the DC600V power supply has the advantages of energy saving, environmental protection, high efficiency, and increased transport capacity. Since 2004, the power supply of the newly built 25T and 25G railway passenger cars basically uses DC600V power supply output from electric locomotives or diesel locomotives. DC600V DC power supply. [0003] Both the locomotive and passenger car in the 25-type passenger train pulled by electric locomotive have DC600V leakage detection function, but the detection principle and circuit structure of the two are different: [0004] According to the pr...

AI Technical Summary

Problems solved by technology

[0006] Therefore, during the operation, the locomotive indicated that there was a ground fault at DC600V, while the leakage detection of the passenger car was normal, which affected the departure of the train.

Images