We manufacture Cam Shaft Controller which is a unique development in the traction motor drive technique. This switching apparatus is controlled and regulated from an electronic control centre which performs the central switching function for driving and breaking circuits. It consists of the resistor stepping switches and group switches for drive and brake mode of operation. It also consists of 30 nos. 460 Amps cam operated switches rated Voltage — 1500 V DC. The total unit is underslung.