Danfoss VLT AutomationVTDrive FC322 Design Manual page 24

Automation VT Drive FC322 Design Guide
2.7.7 Star/delta Starter or Soft-starter not required
When larger motors are started, it is necessary in many countries to use equipment that limits the start-up current. In more traditional systems, a star/
delta starter or soft-starter is widely used. Such motor starters are not required if a frequency converter is used.
As illustrated in the figure below, a frequency converter does not consume more than rated current.
1 = VLT Automation VT Drive
2 = Star/delta starter
3 = Soft-starter
4 = Start directly on mains
MG.20.X1.22 - VLT
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2 Introduction to VLT Automation VT Drive
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