Service

The Efacec Service unit has a team of more than 150 employees and a permanent presence in Portugal, Spain, Angola, Mozambique and Algeria.

The accumulated experience and competence allows us to provide services with the highest quality standards, certified according to ISO 9001: 2008, ISO 14001: 2004 and OHSAS 18001: 2007, ensuring adequate solutions to customers’ needs in:

  • Industrial facilities
  • Hydroelectric plants
  • Thermoelectric power plants
  • Small hydro power plants
  • Co-generation plants
  • Wind farms
  • Substations
  • Transformation stations

 

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  • Commissioning
    • Assembly of accessories
    • Oil and filler treatment
    • Electrical tests on active part and oil
    • Activation Assistance
  • Improvement and repair (on-site and in factory)
    • Replacement or enhancement of accessories
    • Replacement of active part components (winding, magnetic circuit, on and off voltage regulators)
    • Drying of the active part
    • Treatment or replacement of oil
    • Exterior painting
    • Pre-and post-intervention tests
  • Inspection / Revision of Load Regulators (on-site and in factory)
  • Passivation and Regeneration of Oil
  • Transformers Maintenance Management (multi-year contracts)
  • Design / Installation of Monitoring Systems
    • Online monitoring of various transformer parameters, including temperatures and gases dissolved in the oil and monitoring of crossings
    • Transformer performance analysis
  • On-site Diagnostic Tests
    • Measurement of insulation resistance
    • Measurement of transformation ratio
    • Measurement of ohmic resistance
    • Dynamic switching resistance measurement
    • Capacity and delta tangent measurement (dielectric losses)
    • Dielectric Frequency Response Measurement (FDS)
    • Excitation current measurement
    • Short-circuit impedance measurement
    • Verification of the auxiliary circuits of control and protection of the transformers
    • Collection of oil samples for testing in the Efacec laboratory:
      • Physical-chemical
      • Dissolved gas analysis (DGA)
      • Detection and quantification of PCBs / chlorine content
      • Determination of the amount of furan compounds
      • Passivator content (when applicable)
      • Corrosive sulphur detection
      • Particle Content
      • Frequency response analysis (FRA)
  • Distribution Transformers Improvement and Repair
    • Replacement or enhancement of accessories
    • Rewinding
    • Repair and supply of vats and lids
    • Treatment of dielectric oil
    • Tests
  • Commissioning of MV/HV Equipment
    • Assembly
    • Tests
    • Activation Assistance
  • Revamping of LV/MV/HV Facilities and Equipment
    • Replacement of circuit breakers and disconnectors
    • Replacement of transformers
    • Replacement of protections
    • Replacement of LV and MV switchgears
    • Turnkey solutions
  • MV/HV Equipment Repair and Improvement
    • MV/HV circuit breakers
    • MV/HV disconnectors
    • LV and MV switchgears
  • Multiannual and Multi-disciplinary Maintenance Contracts
    • Maintenance of electrical substations
    • Maintenance of wind farms
    • Maintenance of industrial facilities
    • Maintenance of transformation stations
  • Maintenance Management of LV/MV/HV Electrical Installations
    • Predictive maintenance
    • Preventive maintenance
    • Corrective Maintenance
  • Inspection with Multicopters (drones)
    • Visual inspection to detect the condition of the equipment in service
    • Visual inspection to detect the physical state of structures
    • Thermographic inspection for detection of hot spots
  • Expertise, Counseling and Training
    • Diagnosis of failure of electrical power systems equipment
    • Forensic analysis of defects
    • Advice of technical solutions adapted to the needs of customers
    • Selectivity studies
    • Test and parameterization of protection relays
    • Technical training
  • Repair/Maintenance of LV, MV Electric Motors and Alternators
    • Manufacture of coils in ResinRich or VPI system
    • Low and medium voltage winding
    • Repair and/or execution of rotor coils of synchronous machines
    • Repair/replacement of magnetic circuits
    • Repair or manufacture of rotor cages
    • Collectors for AC and DC electric motors
    • Repairing/replacing brushes and brush holders
    • Repair of shafts
    • Dynamic balancing
  • Design and Development of Protection and Control Systems for Motors and Alternators
    • Design, installation and testing of winding rotor motor starters
    • Design/installation of voltage regulators
    • Design/installation of excitation systems for synchronous machines
  • Maintenance Management of Motors and Alternators at Facilities (Multi-Annual Contracts)
  • On-site and Laboratory Electrical Testing
    • Insulation resistance
    • Absorption and polarization coefficients
    • Ohmic resistance
    • Inductance
    • Capacity
    • Magnetization
    • AC and DC dielectric strength
    • Tangent delta and off-line partial discharges
    • Current leakage
    • Shock wave
  • On-Site Mechanical Analysis
    • Measurement of vibrations
    • ODS Analysis – Operating Deflection Shape
    • Balancing
    • Alignments (Laser)
  • Insulation Condition Test of Rotating Machine Windings (EDA III)
  • Thermographic Inspection