Research On Insulation Detecting Device Of Electric Locomotive Roof

Under the circumstances of realizing the leaping development, the railway of our country has experienced six-time speed-raising. At present passenger trains move at the speed of 200km/h in the speed-increase section, the range of raising speed is wider and wider. The loading capacity and speed of freight train is also raising. The current situation of the railway network mixes running freight trains and passenger trains, the train density ranks the top in world. So, the task ensuring safety of railway transportation is very arduous.The high voltage device of electric locomotive vehicle roof is the equipment for the outdoors, there are so enough high voltage insulating ability between the 25KV high voltage electrical device and the locomotive vehicle roof that it prevented reducing the insulation because rain, snow, thunder and so on. When the electric locomotive moves, breakdown may be found in the high voltage device because the locomotive vehicle roof high voltage device breaks down or other reasons. Once the train attendant raises the pantograph when he is unable to judge situation, it will cause the high-voltage electric discharge and grounding.So it will disturb the transportation production because the great faulty which happened cementation between the pantograph slide plates and the catenary, or it will burn out catenary seriously.The insulation detecting device of electric locomotive vehicle roof is one kind of electric locomotive vehicle roof high voltage unit condition synthesis automatic detection installment, which may be used to judge the locomotive vehicle roof high voltage unit is grounding or not. If it is not grounding, then the train attendant may continue to rise the pantograph or change another pantograph avoiding to burn out catenary. Moreover, the device can carry on the synthesis to the electric locomotive vehicle roof high voltage unit various conditions to examine and to make the corresponding control to demonstrate as well as to give an alarm, thus effectively avoids the accident. This device collects switching power supply technology, the monolithic integrated circuit technology, the observation and control technology, the high and low voltage isolation technology and so on. The device has onsummate function, the remarkabl performance,safe reliability and high automaticity.It has active significance to technical promotion of railway transportation equipment, artifice modernization of test, safety of train transportation under the new situation.