elec calc 3.7 and the C15-500 guide AFNOR update

This version elec calc 3.7 includes the technical developments both according to the standards NF C 15-100 and RGIE/AREI which are based on modifications brought to the AFNOR C15-500 guide. This guide takes into account the European TR50-480 referential. This version also improves the management of high voltage networks, the display of short circuits currents as well as the management of curve models with the display of energy limitation curves.

>> AFNOR C15-500 guide update

Cette mise à jour propose au concepteur de choisir au démarrage du projet la nouvelle norme (NF C 15-100 ou RGIE/AREI) 2015 pour son dossier. Elle entraîne certaines évolutions dans les calculs :

This update lets the designer choose at the beginning of a project the new 2015 standard (NF C 15-100 or RGIE/AREI). This brings some changes in the calculations:

  • Management of minimum and maximum values ​​of the upstream short-circuit power (high voltage portion) to be considered in the calculation of the min and max short circuit currents.
  • Evolution of ​​c min and c max power factor values according to IEC 60909 standard (and removal of the m load factor) and its impact on the calculation of HV and LV impedances
  • The influence of motors in the calculation of short circuit currents is now taken into account
  • Calcul du courant de défaut Ief max pour déterminer le pouvoir de coupure sous un pôle en TN (fiche F13 de la C15-100)
  • Lef max default current calculation to determine the break capacity under a TN pole (F13 page of the C15-100)
  • Adjustment of the coefficient k values ​​in the calculation of thermal constraints
  • Prise en compte de l’énergie limitée des appareils de protection
  • The limited power of protection devices is now taken into account

>> Enhancements

Management of high voltage networks with a capability to associate with one or more HV / LV transformers to the same high voltage network

  • The voltage vacuum can be entered to determine the nominal output current of the transformer
  • Display of min and max values of short-circuit and default currents.
  • Evolution of the curve models when displaying the start-up curves, the energy limitation curves (always with the ability to display the start-up motor curves and thermal cable constraints)
  • Export of equipment BOM to an exploitable file in the QDVTM software (formerly QUICK DEVISTM)

>> Part catalogs’ update

  • Integration of break capacity in a TN pole according to CEI 60747-2
  • ABB : Complements to cascading tables

» The version 3.7 is available for download from 19 April onwards for customers with a subscription :

Access the version 3.7

Catalogs’ updates can be downloaded independently:
On our website with a list of downloads by manufacturer (specifying your elec calc license number).
On the support portal, after creating your account and be selected as administrator of the elec calc license.




How to set all marks in manual – elecworks tips and tricks



When the project has been finished and manufactured, it is necessary to set it up as: “As built”, in order to avoid update marks automatically.


An “as built” project has the feature where all marks are not changed automatically, so the marks should be set in manual mode.

The marks can be related to:

  • Equipotentials / wire marks
  • Components
  • Cables
  • Terminals
  • ….

Currently, the only way to do this earlier, was through elecworks interface, by opening the properties of each entity one by one and set up the marking as manual.


There is another option, now. The first step is export the data to Excel file.

Export data excel elecworks

The template to use will be allobjects.xls.

Excel template elecworks

The spreadsheet created will have as many sheets as entities existing in the project.

Spreadsheet elecworks project

For this tip’s purpose, the field to change will be the manual mark in each sheet. It will be filled with “1” in all rows, in order to change the marking mode from automatic to manual.

Changing manual mark field elecworks

Note: From this excel file the descriptions or marks can be changed too and they will be updated in the project.

After changes has been done in the Excel file, the final step is to import the spreadsheet back to the project.

Import back elecworks project

For each type of entity, a tab will be shown with the changes to be done before the excel import to the project.

Tab shown changes elecworks

After checking all tabs, the process can be finished. Now, all marks are in manual mode.

Cable tab marks in manual elecworks
Manual marks setting elecworks


Import, export XLS is a big feature of elecworks but its benefits are not well known for the users. This is just an example about how to set a project in mode “as built” mode automatically, saving time, and avoiding future errors when the project is being reviewed.
Also, this feature (import- export xls) can be used for change descriptions, user data, marks, etc… in the same way as described in this tip.