As a supplier of both variable-speed
drives and soft starters, we’re often asked what the difference is between
the two. Without further ado, let’s answer this common question.
Soft starter
A soft starter is a device that allows an electric motor to
start with reduced voltage, meaning a smooth, gradual run-up to full speed.
This avoids sudden, rapid acceleration which causes huge inrush currents and
exerts potentially damaging mechanical stress on the motor.
Variable-speed drive
A variable-speed drive, on the other hand, is a larger
device that allows the motor’s speed to be controlled throughout its operation,
as well as during start-up. This is achieved by varying motor input frequency
and voltage – specified by the user via a control panel keypad.
Although soft starters are smaller and less expensive than
VSDs, drives provide precise speed control and provide energy savings of up to
50%. If your application requires motor speed to change on demand, then a
variable-speed drive is essential.
Gibbons supply and service ABB drives
for a huge range of industrial and commercial applications, including pumps,
fans and conveyors. For more information, contact our Drives Manager Alan
Roberts on 07966 468430 or email alan.roberts@gibbonsgroup.co.uk.
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