The overload protector is typically installed inside the compressor. Its function is often to be positioned between the driving and driven sides of the power transmission. When an overload fault occurs (torque exceeds the set value), the torque limiter will disengage, effectively protecting the driving machinery and the load;

Common types include friction-type torque limiters and ball-type torque limiters. The installation structures of torque limiters include: shaft-to-shaft, shaft-to-flange, shaft-to-synchronous pulley, shaft-to-sprocket, shaft-to-gear, shaft-to-belt pulley, etc.

The function of overload protection is to prevent the main power circuit from overheating and damaging the protector due to overload.

The overload protectors produced by Zongpro (Dongguan) Electrical are widely used for protecting various compressors, motors, water pumps, and UPS (Uninterruptible Power Supply) systems.