Litost MCO UNO MCB Type Change-Over Switch 63 Amp Double Pole. TWO WAY CENTRE OFF: UNO MCB Changeover Switch is a manually operated changeover switch which finds its application in switching load between two power supplies. UNO MCB Changeover Switch finds wide application in industries as well as in domestic area especially in Individual Bungalow(IB) for use in low voltage distribution circuits. Changeover switches are used to shift from one source of supply to another source and vice versa. The changeover switch comes in 2P versions, for single and three phase application respectively. It has three positions ( I-O-II ) with centre -off. They are switch disconnectors with the independent manual operation, capable of making, carrying and breaking currents under normal circuit conditions. Technical Specifications: Reference Standard IS/IEC 60947-3 No. of poles DP & FP Current Rating(In) 25A, 40A & 63A Rated Voltage(Ue) 240/415 V~ Rated Frequency 50 Hz Rated Insulation Voltage 660V Rated Impulse Voltage 4kV Dielectric Strength 2.5kV Utilization Category AC22A Protection IP20 Ambient Temperature -50C to +550C Mounting Clip on Din Rail(35mm*7.5mm) Vertical