What is an industrial electrical project

Set of studies, calculations, specifications, and drawings that Scale and detail the electrical infrastructure of an industry, of delivery point To Last charge. It covers:

• Medium and low voltage: substation, transformers, QGBTs/QDLs, buses and cables;
  
  
• Protection and selectivity: circuit breakers, fuses, relays, adjustments and coordination;
  
  
• SPDA and grounding: protection against discharges and equipotential meshes;
  
  
• Lighting and technical sockets: efficiency and ergonomics;
  
  
• Backups: generator sets, UPS/Nobreaks, keying and parallelism when applicable;
  
  
• Automation/supervision: measurement, SCADA, sub-measurements and integration with the process;
  
  
• Energy efficiency and energy quality: VFDs, power factor, harmonics, and voltage drops.
  

Why invest (key benefits)

• Security and compliance: shock/fire risk reduction and regulatory compliance;
  
  
• trustworthiness: fewer shutdowns and batch losses due to electrical faults;
  
  
• effectivity: lower specific consumption (kWh/unit) and better use of demand;
  
  
• Scalability: infrastructure prepared for expansions and new equipment;
  
  
• Maintainability: organization, access and identification that reduce MTTR;
  
  
• Traceability: sub-measurements for cost management by area/line.
  

Stages of Development (MSE)

1. Demand analysis and assumptions
   Current/future loads, operating regime, critical condition, environment and interconnections with utilities (HVAC, steam, compressed air, automation).
   
   
2. Studies and calculations
   
   
   • Load flow and voltage drops;
     
     
   • Short circuit (MT/BT);
     
     
   • Coordination and selectivity (relay/circuit breaker settings);
     
     
   • Starting engines (current, voltage impact);
     
     
   • Power factor and harmonics (correction/mitigation).
     
     
3. Electrical architecture
   Definition of arrangement (radial, ring, double bus, redundancies), short levels, insulation classes, and protection philosophy.
   
   
4. Specifications and detailing (BIM)
   Unifilares, rails and beds, cable routing, bills of materials, logic diagrams, substation layout and electrical rooms, Memorials and assembly notebooks.
   
   
5. Construction, testing and commissioning
   FAT/SAT when applicable, functional tests, protection parameterization, As Built and maintenance plan.
   

Main components and good practices

• Substation/transformers: performance, thermal class, impedance and differential protection when necessary.
  
  
• Distribution in BT: buses designed by current and Icc; cables with thermal/voltage drop criteria; segregated routes (force, command, data).
  
  
• Protection: adjustments that guarantee selectivity (the nearest equipment fails first); documented curves and coordination.
  
  
• SPDA/Grounding: mesh with compatible target resistance; equipotentialization and bonding of carcasses/rails.
  
  
• Lighting: illuminance levels according to activity, controls, and efficient photometry.
  
  
• Power quality: FP correction (fixed/automatic), harmonic filters when necessary, transient analysis.
  
  
• Backups: UPS for critical loads; generators with reserve load, tank, and exhaust; safe transfer logic.
  
  
• Automation and measurement: IEDS/meters, gateways and SCADA for energy; demand reports, alarms, and history.
  

Integration with utilities and process

The electrical project must talk with HVAC, SPCI, compressed air, steam, chilled water and automation, providing for interlocks, load priorities, and start/stop procedures. BIM ensures compatibility between architecture, civil, mechanical/piping and electrical.

Standards and compliance (essential, without exaggeration)

• NR-10 (electricity safety);
  
  
• NBR 5410 (BT) and NBR 14039 (MT);
  
  
• SPDA/Grounding (NBR 5419 series and related).
  Other specific standards and requirements are considered depending on the segment and the customer.
  

Common mistakes and how to avoid

• Undersize cables/buses → calculations with peak and expansion scenarios;
  
  
• Ignore selectivity → documented studies and adjustments;
  
  
• No expansion plan → reservation of space/capacity and cable paths;
  
  
• Poor grounding → commission measurements and periodic reports;
  
  
• Lack of undermeasurement → hinders cost management and efficiency.
  

Indicators that improve with a good project

• Electrical availability and OEE;
  
  
• Specific consumption and power factor;
  
  
• Departure time and MTTR;
  
  
• Incidence of voltage drops and untimely disarms.
  

Conclusion

Um industrial electrical project Well designed makes it feasible continuous production, safety and efficiency, reduces costs and prepares the plant for the future - without surprises.

MSE Engenharia performs this service: of Conceptual to basic and executive in BIM, with studies (load flow, short circuit, selectivity), substation, MT/BT distribution, SPDA/grounding, lighting, UPS/generation, automation/SCADA and commissioning, in addition to multidisciplinary compatibility and license support.

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