... experience 3.apply to air compressor WHZD-25A smart motor protector Main Function 1,Protect function:Overload,phase failuer ... ≤90%3,Environmental pollution grade;3 grade. 4,Aplace without violent impace and vibration. Points For Attention 1,User should ... electricity, including ac contactor, air pressure switch, magnetic starter, motor protector, starter delta starter, oil level controller etc. We ...