Electric centralization is one of t

Electric centralization is one of the basic equipment of railway modernization and automation, so it must be more safe and reliable.When the equipment fails, the consequences must also be directed to the safety side (for example, the signal from the green light to the yellow light, from the yellow light to the red light, into the route-oriented lock to unlock, all the guide lock to the safety side), which is called failsafe.2.5.1 principle of fault protectionThis is one of the important principles to be followed in designing electric concentrate."Failsafe" is two things.one When the equipment is trouble-free, it can work exactly as scheduled.2. When a failure occurs, which is unpredictable and inevitable, it does not produce a result that could lead to dangerous driving, known as "failover safety."Based on the above two points, it can be concluded that: when there is a fault danger, it will not cause driving danger; When there are no failures, it must work correctly. It's called failsafe.2.5.2 main equipmentInterlock devices that centrally control signals and switches in signal buildings or vehicle duty rooms.· main equipment:relayElectric point machineTrack circuitsympathy2.5.3 composition of 6502 electric concentration6502 electrical equipment is divided into indoor equipment and outdoor equipment.The signal building (or cab) is equipped with a console, manual unlocking button panel, relay assembly and assembly frame, power supply screen and switchboard;Outside, there are lanterns, electrical switches, track circuits and cable lines.