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# Calculate Size Of DOL and Star-Delta Starter Components

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## 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)

• 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

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

11. j
Nov 21, 2016

This is great !

12. Hayetom
Oct 15, 2016

Help full thank you !

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.

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