What is basic difference between Soft Starters And VFD
drives?
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Answer Posted / asif mansoori
VFD is a Drive (continuous controlled operation)
Soft Starter is a Starter (for Smooth Starting torque &
current)
VFD changes frequency applied to the motor and changes its
operating speed.
Soft Starter reduces applied voltage to the motor thereby
reducing the starting torque & hence reduced starting
current.
VFD changes both voltage & frequency.
Soft starter only changes voltage at the starting of motor
but doesn't change frequency.
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