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

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