Search

Premium Membership

Save 15% on Pro Premium Plan with discount code: UX778 (expires on October 31st). Study specialized LV/MV/HV technical articles and papers.

Home / Download Center / Electrical Software Reviews / Calculate Size Of DOL and Star-Delta Starter Components
Calculate Size Of DOL and Star-Delta Starter Components
Calculate Size Of DOL and Star-Delta Starter Components

Easy way to calculate motor torque, fuse, CB, OL relay and contactor

For both DOL and Star-Delta Starter input fields are:

  1. System Voltage (V)
  2. Phase (1ph/3ph)
  3. Type of Motor (single phase, 3-phase induction, synchronous, wound rotor etc.)
  4. Motor Size (HP or kW)
  5. Motor Code (A, B, C… -H)
  6. Motor Efficiency (%)
  7. Motor RPM
  8. System P.F
  9. Application of Motor (motor load in household application, hermetic refrigerant comperssor motor etc.)

According to above inputs, following starters components are calculated:

Motor Torque / Current

  • Motor Rated Tourque (Full Load)
  • Motor Rated Tourque (Full Load)
  • Motor Starting Torque
  • Lock Rotor Current IL (Min)
  • Lock Rotor Current IL (Max)
  • Motor Starting Current
  • Motor Full Load Current (Line)
  • Motor Full Load Current (Phase)

Fuse (As per NEC 430-52)

  • Non-Time Delay Fuse (Max)
  • Time Delay Fuse (Max)

Circuit Breaker (As per NEC 430-52)

  • Instantaneous Trip Circuit Breaker (Max)
  • Inverse Time Circuit Breaker (Max)

Over Load Relay Setting

  • Relay Min (70% of FLC Phase)
  • Relay Max (120% of FLC Phase) or
  • Relay Setting (100% of FLC Line)

Contactor (for DOL starter)

  • Type of Contactor
  • Making / Breaking Capacity of Contactor:
  • Main Contactor (100% of FLC Line):

Contactor (for Star-Delta Starter)

  • Type of Contactor:
  • Making / Breaking Capacity of Contactor:
  • Main Contactor (58% of FLC Line):
  • Delta Contactor (58% of FLC Line):
  • Star Contactor (33% of FLC Line):

Transient Time Delay Setting (for Star-Delta Starter)

Software:Calculate Size Of DOL and Star-Delta Starter Components
Version:10.6.13
Developer:Jignesh Parmar
Size:274 KB
Price:Free
Download:Right here | Video Courses | Membership | Download Updates
Calculate Size Of DOL and Star-Delta Starter Components (Contactor Configuration Sheet)
Calculate Size Of DOL and Star-Delta Starter Components (Contactor Configuration Sheet)

Premium Membership

Get access to premium HV/MV/LV technical articles, advanced electrical engineering guides, papers, and much more! It will help you to shape up your technical skills in your everyday life as an electrical engineer.
More Information

31 Comments


  1. Mahmoud Okasha
    Oct 30, 2020

    Very Good program. but i prefer to put some legend for some definitions such as motor code.


  2. Nk
    Aug 28, 2020

    All files are protected, we cant edit it.


  3. MinCoi
    Nov 15, 2019

    Thanks you!


  4. Dheeraj
    Sep 07, 2019

    Thanks for it 😊 s very help full and very good information


  5. Sylvestr wamango
    Jun 24, 2019

    This is great i have learn alot so far …


  6. afzal
    Feb 19, 2019

    thanks for such a great work sir:)


  7. emmanuel ganalon
    Oct 19, 2018

    good day sir i have 10hp ,230v, 60hz, 3 phase motor drive for fan blower can you give me the exact capacity of magnetic contactor relay, overload relay, breaker, and fuse thank you….


  8. Parveen Kumar
    Mar 07, 2018

    very useful tool —————-thanks


  9. gendhul
    Nov 28, 2017

    very help full

    thanks


  10. ashok rao
    May 23, 2017

    Helpful


  11. j
    Nov 21, 2016

    This is great !


  12. Hayetom
    Oct 15, 2016

    Help full thank you !


  13. ali alizadeh
    Sep 29, 2016

    Thank You so much it is very helpful


  14. alwyn
    Nov 14, 2015

    Hi,
    Very useful tool………… thanks a lot…………


  15. Viral Zala
    Oct 04, 2015

    Really Very useful tool. Thanks a lot.

Leave a Reply to Nk

Tell us what you're thinking... we care about your opinion! Please keep in mind that comments are moderated and rel="nofollow" is in use. So, please do not use a spammy keyword or a domain as your name, or it will be deleted. Let's have a professional and meaningful conversation instead. Thanks for dropping by!

6  ×    =  forty two

Learn to Design Power Systems

Learn to design LV/MV/HV power systems through professional video courses. Lifetime access. Apply a 15% discount code EAB77 and enjoy learning!

Subscribe to Newsletter

Subscribe to our Weekly Digest newsletter and receive free updates on new technical articles, video courses and electrical guides.