Push- Button Operated Auto Transformer Starters are totally enclosed in separate dust and vermin proof sheet steel enclosure that is suitable for floor mounting. These Auto Transformer Starters are suitable for 415/ 550 V AC, three phase squirrel cage induction motors in a range of up to 150kw/ 200hp. These Auto Transformer Starters are provided with 3-air break contactors, 1-thermal over-load relay to facilitate ease of operation. Push- Button Operated Auto Transformer Starters are designed to provide optimum performance for longer period of time.