The 8 Poles – 50Hz – 230/400V MVE-Exe Increased Safety Electric Motovibrators are electric motors designed to provide vibration to equipment such as screens, feeders, and conveyors in hazardous environments. They have eight magnetic poles within the stator and operate at a frequency of 50Hz. These motors are classified as “Exe” motors, meaning they are designed to prevent the ignition of surrounding explosive atmospheres by preventing the occurrence of sparks or hot surfaces.