How much is the length of a low-voltage automation equipment cable

It should not exceed 500 meters. According to the query low-voltage automation equipment line design specifications know, low-voltage automation equipment is a low-voltage power supply distance of 500 meters, low-voltage cable length should not be more than 500 meters, otherwise there will be security risks. Low-voltage unit automation, that is, by an excitation screen and a low-voltage machine, group integrated control panel group.