Manually operated 3 and 4 pole open transition transfer switching equipment rated from 63 A to 3200. The 3 phase changeover switch and bypass switch range includes stable contacts with built-in mechanical interlocks between the power switching devices. These electrical switches are classified as MTSE of class PC according to IEC 60947-6-1 and considered to be one of the safest and most utilized changeover switch for generator and utility  network supply applications.