High & Low Voltage Electricity

Define, ensure the reliability of, and secure the power supply for sites, industrial facilities, or systems.

 Need support?

We provide a full range of studies, calculations, and modeling services for electrical systems, aimed at defining, enhancing the reliability of, and securing the power supply for sites, industrial facilities, and systems. We support our clients from audit to implementation, addressing all their power supply needs: new projects, system overhauls, or reliability improvements. 

We can also carry out “turnkey” projects as part of electrical renovations.

Our expertise

  • Reliability audits for HV, HV/LV, and LV power supplies 

  • Project management for the renovation and reliability enhancement of HV and LV installations, backup power plants, and surge protection systems… 

  • Protection selectivity analysis 

  • Analysis of electrical network behavior (short circuits, load balancing; voltage levels, motor starting or transformer magnetization, harmonics, etc.)

  • Illuminance studies, FLJ

  • Pre-acceptance operations, commissioning 

  • Harmonic measurement

Sectors

  • Data Centers 

  • Hospitals, 

  • Pharmaceutical, 

  • Chemicals / Petrochemicals 

  • Energy & Environment 

  • Nuclear 

  • Oil & Gas 

  • Industry  

  • Life Sciences

  • Agri-food

  • Semiconductors / Microelectronics

Our Deliverables

  • Single-line diagram of MV/HV and LV distribution,

  • Reliability audit report,

  • Power balance sheets (normal power supply, backup power supply, UPS, etc.),  

  • Calculation notes, sizing (cables, protective devices, generator sets, etc.),  

  • Equipment layout plan, cable routing, etc.,

  • Detailed diagrams of main distribution boards and LV panels,

  • 3D model,

  • Operational analysis (HV/LV and LV distribution, generator set control center, surge protection distribution), 

  • Protection plan, selectivity study, protection settings sheet, 

  • Technical documentation (Preliminary Design, Detailed Design, Construction Documents, As-Built Drawings, etc.), study report, budget estimate, schedule…, 

  • Specifications for the construction bid, 

  • Building self-inspection or regulatory checklists 

  • Support and coordination with other disciplines: General Contracting/Structural Engineering, Roads and Utilities, HVAC, EIA.

Our software

  • ETAP 

  • ElecCalc  

  • CANECO ONE Suite 

  • SOLIDWORKS ELECTRICAL 

  • SEE Electrical Exper 

  • Microstation

  • AutoCAD 

  • PVsyst 

  • DIALUX

  • Revit

Group presence

The Snef Group operates across four continents—the Americas, Europe, Africa, and Oceania—in 30 countries and 80 cities, with a network spanning more than 100 international locations.