TUV CE Certified High Quality High Speed ENERGY SAVING EC Electric Cooling Fan in 172x150x51mm

EC stands for Electronically Commutated; it combines AC and DC advantage and the fan with a single phase or three phases supply, but runs on a DC voltage. (The motor runs on a DC voltage, but with a single phase 230VAC or three phase 400VAC supply.) The motor incorporates voltage transformation within the motor. The non-rotating part of the motor (stator) is extended to make room for an electronic PCB, which includes power transformation AC to DC, as well as the controls.