Question { 5063 }

Can VFD step up to 60 Hz if it is designed to receive 50 Hz
input?

Answer

VFD can be vary upto 80hz but we need to set the limits
into parameter settings.

Question { 7805 }

in VFD when freq is reduce the voltage will reduceor not if
it will reduced upto ...

Answer

I think in VFD When frequency increases voltage also
increased & vice versa

Question { Essar, 6069 }

what is softstarter? explain briefly where it is used?

Answer

Soft starter is made up of thyristor is used to limit the
starting current of heavy motor.it is basically used to
increase the life of motor.
Because at start due to high current there is possibility
of damaged of motor due to iron loss.so soft starter avoid
s this.