what is current path in 6 winding transformer
This is not a current transformer, if you apply an AC voltage to one winding, you can measure nearly the same voltage at all other windings. Current flows only through windings connected to a load. You can use only two windings or more. You may connect several windings in series or parallel, but you have to respect the winding direction. The dots are marking the winding direction. For a parallel connection, pin 1 may be connected to pin 2 and pin 4 to pin 5. For a serial connection, pin 4 and 2 are connected. The parallel connection is used for more current and less windings resistance, the serial connection for more voltage and higher resistance. You can use this transformer for a 1:1 ratio, but also 1:2, 1:3, 1:4, 1:5, 2:3.