Why did the locomotive of Beijing Bureau rise to the front bow?

This is for safety. If the front bow is raised, if there is a pantograph-catenary accident, falling objects will damage the roof, and the rear bow can avoid this situation.

It is rare to raise the front bow. Generally, the front bow is used when the rear bow fails. However, some fixed-weight on-line cars (such as SS3B) have a long car body, which leads the driver not to know when to turn off the main circuit breaker when crossing the phase, so some fixed-weight on-line cars raise the front bow.

In addition, when the current is not good in ice and snow weather, the double bow will be raised to run, and when the catenary freezes, the front bow will be used to deice. In fact, raising the rear bow is only a maintenance rule. According to the locomotive design, the front bow can be raised, and even some cars can raise the double bow!

There are several reasons for raising the rear bow:

1. The dust falling from the pantograph will not fall on the top of the locomotive, causing some so-called consequences.

In case of pantograph-catenary accident, you have time to put down the back bow.

3. There is enough margin when passing the stage.

The electric car will only rise with the front and rear side stays when the oil is changed or the chassis fails. So you don't get angry under normal circumstances. Of course, wherever the slogan "Don't use double bows" appears, trains can use double bows, so that the current will be more stable and all aspects of performance will be better.

Finally, the headmaster thinks that there is no doubt that we will see the prohibition of double bows next to the train in the future. In fact, it is mainly to warn train drivers and remind truck drivers not to use double bows. Have you finally understood after reading it?