... experience 3.apply to air compressor WHZD-25A smart motor protector Main Function 1,Protect function: ... error appeared:The Stop indicating lamp on,and switch off the workingpower supplay of the motor. ... low voltage electricity, including ac contactor, air pressure switch, magnetic starter, motor protector, starter delta starter, ... VISITING! NEW DESIGN!! WHZD-25A smart motor protector(CCC&CE&ISO9001)