Sectionneurs 120kV
Rectifier drawer upgrading
120kV Power breaker
Thyristors verification
Protection panel upgrade (After)
Rectifier
Disjoncteur avant remise à neuf
Protection panel upgrade (Before)
Rectifier control card upgrading
Power transformer
6MVA Power Transformer
6MVA Power transformer
Capacitor bank
25kV Switchgear
Thermographic inspection
Primary injection test
Switchgear design
Infrared picture
46MVA Power transformer
Time-current curve protection analysis
Protection relay
Mobile services units
Wave quality measurements
Industrial battery charger
6MVA Power Transformer
Breaker after refurbishing
Contact and insulation resistance mesurement
Busbar manufacturing

Field services - Transformer maintenance

Transformers play an essential role within electrical networks. Any breakdown or incorrect operation can quickly result in very large damage costs. MDL Énergie inc. has a large experience in preventive maintenance to ensure proper transformer operation and to make sure that the transformer life does not degrade prematurely. Listed below are some of the measurements and tests that can be performed as part of a transformer preventive maintenance program:

  • Transformer ratio measurement
  • Oil sampling and analysis
  • Cooling system test and inspection
  • Gas and pressure relay test and inspection
  • Auxiliary contact test
  • Grounding test
  • Winding, insulation and ground resistance measurement
  • Dielectric insulation and power factor measurement
  • Bushing and winding dissipation factor measurement
  • Test and inspection of alarm and trips
  • Frequency response measurement (FLRA)
46MVA Power transformer
46MVA Power transformer
6MVA Power Transformer
6MVA Power Transformer