Easy way to calculate motor torque, fuse, CB, OL relay and contactor
For both DOL and Star-Delta Starter input fields are:
- System Voltage (V)
- Phase (1ph/3ph)
- Type of Motor (single phase, 3-phase induction, synchronous, wound rotor etc.)
- Motor Size (HP or kW)
- Motor Code (A, B, C… -H)
- Motor Efficiency (%)
- Motor RPM
- System P.F
- 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 |
thank you, Great
Very Good program. but i prefer to put some legend for some definitions such as motor code.
All files are protected, we cant edit it.
Thanks you!
Thanks for it 😊 s very help full and very good information
This is great i have learn alot so far …
thanks for such a great work sir:)
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….
very useful tool —————-thanks
very help full
thanks
Helpful
This is great !
Help full thank you !
Thank You so much it is very helpful
Hi,
Very useful tool………… thanks a lot…………
Really Very useful tool. Thanks a lot.
how to download this excel formet
how we check the rating and size of cable use in system
thx buddy….awesom work hav done.
I have more information
it’s better that this calculator do with MATLAB software(GUI)/
Tnks very much!! that is simply and very usfull!
Please add me to this group.
Jignesh Parmar——— thank you ——- go ahead
Thanks. I need to download the software
Hi
Tanks a lot.I need your help to download the software, because I cant do it.
Thank You so much it is very helpful
thank you very much
that’s very good
5hanks a lot for the useful tool.
Very useful tool for every electrical engineer… special thanks to ” Jignesh Parmar”