What is the primary function of the tractor protection system?

The primary function of the tractor protection system is to prevent air depletion to unsafe levels. This system is designed to maintain the integrity of the air supply for the trailer's braking system, ensuring that there is sufficient air pressure available to operate the brakes effectively. When the tractor Protection System is functioning properly, it helps prevent situations where air pressure could drop to a point that compromises braking performance, thus enhancing safety on the road.

By maintaining adequate air supply, the system also plays a crucial role in preventing accidents that could occur due to loss of braking capability, particularly in heavy vehicles where stopping distance is significantly longer. This aspect is vital when considering the operational requirements for vehicles towing heavier trailers, as the braking system must be both reliable and responsive.