3 phase supply to motor input voltage

[shami_jadoon]

 i have taken this screen shot from NI example of wind turbine with DFIG. i just need to ask one thing,
why ''1'' i applied to amplitude of power grid is applied, i mean 60 Hz frequency is clear to me that 3 phase power have 60 Hz frequency but what is mean by 1? is it power voltage current or what ? please help

[AnalogKid2DigitalMan]

I suspect it is voltage since it is being used as a multiplier for the voltage output terminal, what does the detailed help say?

-AK2DM

[shami_jadoon]

yes it is voltage but i dont understand that it has magnitude of ''1''. I mean voltage with one magnitude means what? it would be 440,200 etc. correct me if i wrong.