The negative phase sequence in a
3-phase synchronous motor exists when the motor is
Underloaded
Overloaded
Supplied with unbalanced voltage
Hot
Supplied with unbalanced voltage
The
negative phase sequence in a 3-phase synchronous motor exists when the motor is
supplied with unbalanced voltage.
●The
flow of negative sequence currents in electrical machines are undesirable as
these currents generate high and possible unpredictable temperatures in a very
short time.
Hence,
the correct option is (C).
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