Selection Of MCCB, ELCB For Main-Branch Circuit (MS Excel Spreadsheet)

24 Comments

1. 
   James Khalil
   

   Oct 02, 2019

   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

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2. 
   Debmalya Dasgupta
   

   Sep 27, 2019

   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

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3. 
   Abdelkawy Almasry
   

   Sep 26, 2019

   Really its very excellent and good explanation.

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4. 
   biji mathew
   

   Jul 01, 2018

   useless … the spreadsheet is not working ….

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5. 
   mamad azad
   

   Mar 26, 2017

   hi.pleaze pass???

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6. 
   Roman Bogdanov
   

   Dec 29, 2016

   Hi, How I can get a password for datasheets?

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7. 
   Chanh
   

   Aug 25, 2016

   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.

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8. 
   Dharmendra
   

   May 21, 2016

   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

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9. 
   Ala Sharief
   

   May 14, 2016

   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. ??!!!!

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10. 
    ahmed abozied
    

    Feb 20, 2016

    pleas how to open XLS file ,iam try do not open

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11. 
    Hor Chin EK
    

    Oct 14, 2015

    may I have the password?

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12. 
    gaspar
    

    Aug 25, 2015

    can i have the password plz? ty

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13. 
    jose
    

    Jul 23, 2015

    tripping amp rating is wrong no decimal point ..
    overall good work..

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14. 
    kishore
    

    Aug 11, 2014

    Sir, trying to work with the XL, can’t access, it’s pass word protected,
    can i have the password

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15. 
    Kelvin Wong
    

    Jul 21, 2014

    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?

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16. 
    NPT Châu
    

    Jun 04, 2014

    Thank Ad very much!

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17. 
    Abdul Wahid
    

    Jun 03, 2014

    Thanks alot

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18. 
    sudhir
    

    Mar 27, 2014

    How to download this file

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19. 
    Patrick Weerasinghe
    

    Feb 10, 2014

    I down loaded the XL on MCCB selection but could not use as the message comes that it is write protected

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20. 
    henry02
    

    Oct 14, 2013

    Thanks a lots. Excellent !!!

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21. 
    nmr
    

    Jun 17, 2013

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22. 
    Edvard
    

    Nov 27, 2011

    I agree, excellent explanation.

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23. 
    Eagle2011
    

    Nov 27, 2011

    tnx , they are very useful

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