DGA and Oil Quality Analysis

Regular testing of transformer and switchgear and cable oil can provide information on the electrical properties of its insulating medium, and helps to detect incipient fault in the equipment. The type of oil we can test: Mineral oil, Silicone oil, Cable oil, FR3 and Ester oil.

Dissolved Gas Analysis

Oil Quality Analysis

DGA of insulating oils gives a reliable information on the condition of the transformers, cables and load tap changers. Using DGA, we can accurately measure the concentrations of those nine tell-tale dissolved gases:

  • Hydrogen
  • Nitrogen
  • Methane
  • Ethane
  • Ethylene
  • Acetylene
  • Carbon monoxide
  • Carbon dioxide
  • Oxygen

The concentrations and ratios of these gases could indicate if transformer has Partial Discharge, Thermal Overheating or Arcing conditions. This would help customers plan for timely shutdown to prevent costly repairs and downtime.

Monitoring and maintaining oil quality is paramount to ensure continued reliable operation of your oil-filled equipment.

  • Oil Quality:
    • Dielectric Strength
    • Water Content
    • Particle Profile
  • Ageing
    • Acidity
    • Interfacial tension
    • Dielectric Dissipation Factor (DDF) & volume resistivity
  • Assessment on Paper Ageing
    • Furan Analysis
    • Degree of polymerization test
  • Physical and Chemical Properties
    • Colour and appearance
    • Corrosive sulphur
    • Inhibitor content
    • Passivator
    • Oil Quality Index No.
    • Polychlorinated biphenyls (PCBs)
    • Buccholz relay gas analysis
    • Metal in oil analysis
    • Fourier Transform Infra-Red (FTIR)

Comprehensive reports will be provided, which are also stored so that trends can be monitored easily. By regularly testing your equipment’s insulation oils and paper, we can alert you to the very early stages of deterioration or potential faults, before you suffer a costly outage.