# Design DOL / Star-Delta Starter

- Calculate Lock Rotor Current.
- Calculate Motor Starting Current.
- Calculate Motor Full Load Current.
- Calculate Non-time Delay/Time Delay fuse Size.
- Calculate Circuit Breaker Size.
- Calculate Overload Relay setting.
- Calculate Type of Contactor.
- Calculate Size of Main Contactor.
- Calculate Size of Star Contactor.
- Calculate Size of Delta Contactor.
- Standard Arrangement of Main and Auxiliary Contactor

### Like this:

Like Loading...

*Related*

**About Jignesh.Parmar**

Jignesh Parmar has completed M.Tech (Power System Control), B.E(Electrical) from Gujarat University. He has more than 13 years experience in Power Transmission-Power Distribution-Electrical energy theft detection-Electrical Maintenance-Electrical Projects(Planning-Designing-coordination-Execution). He is Presently associate with one of the leading business group as a Deputy Manager at Ahmedabad,India. He is Freelancer Programmer of Advance Excel and design useful Excel Sheets of Electrical Engineering as per IS,NEC,IEC,IEEE codes. He is technical Author for "Electrical Mirror" and "Electrical India" Magazines. He is Technical Blogger and Familiar with English, Hindi, Gujarati, French languages. He wants to Share his experience & knowledge and help technical enthusiasts to find suitable solutions and updating themselves on various Engineering Topics.

sir, i have read that a single phase motor will be only upto 2 HP….also DOL starters are use for 3 phase motors upto 5 HP…then why did u design a DOL starter for a single phase 3 HP motor??

Selection of all Parameter shown in Sheet are just Demo only..You can select it according to your requirements..

By the way Who told you that DOL is used up to 5HP only !!!!..any 1Phase motor are available up to 2HP only !!!!

Thanks for your great work, man..

what is the formula for Volatge regulation of 11KV distribution line .suppose we have 3MVA 33/11KV s/s and we have to give power supply to the 200KVA ,11/0.4 s/s for industrial load(Proposal ) and it is covered 0.2KM .so what is the volage regulation for that proposal point ?

New Post on this Topic will be released on tomorrow.

Thanks for your great work, sir

very helpfull

thanks for your information and very useful in electrical student

Thank you very much Sir for all these information in one stoke!!!! i m grateful to you.

Hi Sir,

Is the calculation on the blog or theres a download link? I cant seem to see the download link.

Obviously Download link is there…Just press “Free Downloading”

Hi,

I am willing to learn electrical. Basically i am instrumentation engineer. i am not able to find a right way to learn about electrical. Please guide me where should i start from.

Thanks & Regards,

S.Karthikeyan

u r realy great sir……….

very nice

Hi sir

thank you very much sir for all quastion & answer information in one stock……

i am GREATFULL to YOU.

sir ur calculation for dol & star delta download as deleted by user it showing.

pls tell me how to get this……..

what is the suitable relay for 15 hp star delta motor

please provide estimation and BOQ excel sheets and softwares

I have an air compressor that has a Wye Start Delta Run start up. While doig some current tests we noticed 40 Amps more leaving the contactore than coming in on the mains. I would like to send you an attachment to better explain what we are showing but when you add what is going out on the two conactors it is more than what is coming in on the main conductors (one set of three). Can I send you my drawing?