# Free tool to design Motor control Circuit - DOL Starter and Star-Delta

**URL:** <https://forumautomation.com/t/free-tool-to-design-motor-control-circuit-dol-starter-and-star-delta/974>\
**Category:** Software and Tools\
**Created:** [April 10, 2016, 4:54am UTC](https://forumautomation.com/t/free-tool-to-design-motor-control-circuit-dol-starter-and-star-delta/974 "2016-04-10T04:54:56Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![denizen](https://forumautomation.com/letter_avatar_proxy/v4/letter/d/848f3c/32.png) [@denizen](https://forumautomation.com/u/denizen)\
**Post date:** [April 10, 2016, 4:54am UTC](https://forumautomation.com/t/free-tool-to-design-motor-control-circuit-dol-starter-and-star-delta/974/1 "2016-04-10T04:54:56Z")

</div>

Tool to design DOL starter and Start to Delta.

This tools is an Microsoft Excel Spreadsheet.

Components used in DOL starter and Star- Delta Starter- Fuse Circuit Breaker Over load Relay setting Contactor

**DOL Starter & Star-Delta Converter- Tool**

Following information need to be entered to design DOL starter and Star - Delta

System Voltage Phase Type of Motor Motor Size Motor Code Motor Efficiency Motor RPM System P.F Application of Motor

Following Parameter are calculated with spreadsheet tool.

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

```

 ![DOL and Star-Delta starter designing tool](https://cdn.forumautomation.com/original/1X/cd4a5620e90bff8d380140fc510f8dfe49e720fd.jpg)

[DOL and Star-Delta Starter Desingning tool.xls](https://cdn.forumautomation.com/original/1X/77fe90e6fde0c2faa1ccadcce20d0875e58abc2d.xls) (288.5 KB)