Electrical grid engineering, selectivity of protection relays

Modeling of electrical grids and electro-technical study services

Engineering and high-voltage expertise

We offer our high-voltage expertise by imagining restoration, reliability improvement solutions in the form of preliminary surveys and bills of specifications.

Thanks to powerful calculation tools conceptualising electrical grids, we are able to carry out different electrotechnical studies:

Description of studies:

  • Short-circuit studies according to CEI 60909 standard
  • Selectivity of protection relays
  • Study of power flow and voltage plan
  • Dynamic stability study, for example: short circuit, load impact, source changeover
  • Charting [U;Q] and RTE protectability study for the connection of electricity generators
  • Formulation of regulation strategies in P and Q for electricity storage systems
  • Harmonic pollution study


  • CEI 60909
  • NFC 13-200


  • SKM PTW 32
  • EMTP
  • PSIM
  • DIgSILENT Power Factory


  • MASE Sud-Ouest
  • EFQM
  • AFAQ 9001

Other related services


High Voltage expertise

Electricity is now part of everyday life. If poorly controlled, it can trigger numerous incidents or accidents.


Protection and control engineering

Completely tailor-made Control Command and Protection systems, ensuring the scalability of your systems and compliance with standards


EMC Compliance

SCLE has its own Electromagnetic Compatibility laboratory accredited COFRAC, ISO 17025 standard


Power tests

An energy conversion platform, real energy efficiency laboratory


Hardware and software design

Let's build your equipment and software together


Electronic redesign and obsolescence management

Maximize the lifespan and performance of your electronic products

Our products

Our ranges of products and solutions adapted to electrical networks & rail transport networks.

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Do you have team spirit and the desire to participate in stimulating projects? U.S. too !

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Our certifications

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