transformer design using relay and contactors

[Rajan Shakti]

ok,lets say the transformer getting input voltages 380-400-440-480-660-690 V and out put is 230-440 v,the tappings provided for the incoming voltages but the incoming will be the same connection either it can be of any voltages,how can it be done by the use of relay and contactors for different set and range of voltages without any manual selector switch


Read more: http://www.electriciansforums.net/i...s/65547-transformer-design.html#ixzz29dZTlxdf