At what pressure does the air compressor turn on?

The correct choice of 850kPa for the pressure at which the air compressor turns on aligns with typical operational parameters for air systems used in traction applications, such as those found in trains and other rail vehicles. In these systems, the air compressor is designed to maintain a specific pressure range to ensure the reliable operation of pneumatic systems, including braking and other control mechanisms.

Starting the compressor at 850kPa ensures that the system has sufficient pressure to power pneumatic devices effectively and allows for safe and efficient operation of the overall system. Having this compressor set to turn on at 850kPa also helps in maintaining the integrity and longevity of the components by avoiding excessive wear that could occur if the pressure was set too high or too low.

This operating pressure is a standard parameter seen in many industrial and transport settings, reflecting a balance between performance needs and mechanical limits. The choice of 850kPa aligns well with engineering practices that demand reliability and efficiency in air compressor operation within traction systems.