Auto Switch/ Single Phase Preventor is used for three phase motor starter and three phase submersible starter. Auto Switch protects, control and monitors the three phase submersible pumps and motors. Single Phase Preventor is specially designed to suit the tough agricultural needs. The Auto Switch is easy to fit inside most motor panels. Auto Switch/ Single Phase Preventor is provided with switch for auto manual operations and is fitted with built-in timer for star-delta operation.