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
- Calculate total load
- Calculate 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 | Get Download Updates | Get Premium Membership |
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
The excel file shown above is not calculating well for cable selection , i make test for 3 phase load with current 474 A , and i set cable size 10 mm^2 and excel sheet still give that cable design is O.K. ??!!!!
pleas how to open XLS file ,iam try do not open
may I have the password?
can i have the password plz? ty
tripping amp rating is wrong no decimal point ..
overall good work..
Sir, trying to work with the XL, can’t access, it’s pass word protected,
can i have the password
Hi,
I have downloaded this excel worksheet but I cannot access to it as it is being protected by a password can I have the password so I can start to use this excel work sheet?
Thank Ad very much!
Thanks alot
How to download this file
I down loaded the XL on MCCB selection but could not use as the message comes that it is write protected
Thanks a lots. Excellent !!!
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I agree, excellent explanation.
tnx , they are very useful