Forums » Electrical Engineering

Soft Starter over DOL Starter

    • 1 posts
    January 26, 2020 5:23 AM PST

    Hello,

    can somebody tell me the advantage of Soft Starter over DOL Starter

    • 71 posts
    February 29, 2020 7:00 PM PST

    Wilber - 

    I can't tell from your question what you level of knowledge.  If this is a serious question, you need to do a bit of homework.

    May I gently suggest:

    Start with looking at Across the line motor starting profiles - in particular inrush and locked rotor current.

    Then get specs for the different soft starts.  The application guides will give a picture for the modified motor starting profiles.  Hint: Look at the inrush/lock rotor current.

    However, if on the off chance you need a non-engineering answer:

    A soft start reduces the inrush, locked rotor current on exchange for lengthening the start time.