What is the voltage level of two phase machine in three phase?

From one phase to the next you should see 208 Volts.

From any phase to ground you should see 121 Volts.

You are very unlikely to come across a two-phase machine, as two-phase a.c. systems are archaic. A two-phase system has two phase voltages that are 90 degrees out of phase with each other, and was used many years' ago. These days, you have either single phase or three phase. So it's probably safe to say that there are no two-phase motors about, these days!