Selection of main and branch circuit breakers
Spreadsheet calculates the following:
- Size and type of main MCCB, RCCB and ELCB for continious and non-continious load
- Sensitivity of MCCB, RCCB and ELCB
- Size of cable
- Size and type of sub-circuit MCCB and MCB for continious and non-continious load
- Total load
- Main and branch circuit current.
| Software: | Selection of MCCB, ELCB for main-branch circuit – MS Excel Spreadsheet |
| Version: | 22.8.2012  |
| Developer: | Jignesh Parmar |
| Size: | 147 Kb |
| Price: | Free |
| Download: | Right here | Video Courses | Membership | Download Updates |
Im a Electrical Engineer.I found your site very helpfull and has very useful contents.
DEAR SIR,
CAN YOU PLEASE SUGGEST A BOOK WHEREIN I CAN GET ALL THE IMPORTANT FORMULAE FOR ELECTRICAL ENGINEERING DESIGN CALCULATIONS READY HAND FOR PROJECT ENGINEERING RELATED TO ELECTRICAL SYSTEM DESIGN.
I AM A BE ELECTRICAL ENGINEER PRESENTLY RETIRED AGED 67 YEARS HAVING PUT UP AN INDUSTRIAL EXPERIENCE IN PROJECTS FOR 38 YEARS.
THANKS.
PARTHA
Thanks a lot for your sharing.
Very Nice.
How to increase the wire size?
It is a very good tool for the development of electrical circuits.
Please send me you application.
Thanks.
Im a Electrical Engineer.I found your site very helpfull and has very useful contents.
1. You should not include FUR (Future) load when sizing Over Current Protection Device (OCPD) for a specific load. The size of the OCPD should Be to protect the current load, otherwise the OCPD is NOT protected.
2. the NEC FLA of motor loads are HP driven and not KVA driven. Also the circuit trip amps can be up to 250% of the FLA. see NEC Table 430-250
Hi Jignesh,
I am working in a project where there are 12 nos. LV (415V) motors fed from MCC located about 1.1kM away from the motors. There are LCS located near the motors.understand from another project that in such long distance cases, when a stop signal is given from LCS, the contactor remains picked up due to the stored energy due to cable capacitance. Kindly advise some mitigation measures in this kind of situation to avoid mal-operation.
Regards
Debmalya
Really its very excellent and good explanation.
useless … the spreadsheet is not working ….
hi.pleaze pass???
Hi, How I can get a password for datasheets?
I don’t understand some symbol in calculator spreadsheet. Would you like to send me a table for these symbol. I hope your reply soon.
Thanks and best regards.
Sir,
The Selection of MCCB spreadsheet I can not select more than 120 sq mm cable size , so please update this sheet for other size of cable