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its answer is YES because 220 is a phase voltage in three phase system and line voltage for three phase system is 220*1.732=381 or 380. thus motor runs.

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The above answer is wrong. Just because one leg to ground voltage is 220 volts on a 380 volt system does not allow the three phase motor to run off of one leg of a three phase system. A three phase motor is wound with three sets of coils which, if connected as above, the other two motor coils would not get energised.

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When a motor runs on 380V three phase, it is connected in star, which means that one end of each of the three motor windings are connected together to create a star point. The other end of each motor winding is connected to one of the three phases.

If you only have 220V supply, you can still run the motor, but then you need to use a current inverter (or drive) to divide the 220V supply into three phases and the motor MUST then be connected in DELTA. This is achieved by connecting the windings end to end.

Here is a diagram of a delta and a star (or Y) connection

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