Dissolved Gas Analysis Of Transformer Oil

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Transformer Oil Analysis
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AboutTransformer Oil Analysis

• Transformer oils are subject to electrical and
  mechanical stresses while a transformer or other
  electrical distribution equipment is in
  operation.
• The analysis of insulating oils provides
  information about the oil, but also enables the
  detection of other possible problems, including
  contact arcing, aging insulating paper and other
  latent faults and is an indispensable part of a
  cost-efficient electrical maintenance program.
• Though the failure risk of a transformer and
  other oil-filled electrical equipment is small,
  when failures occur, they inevitably lead to high
  repair costs, long downtime and possible safety
  risks. By accurately monitoring the condition of
  the oil, suddenly occurring faults can be
  discovered in time and outages can potentially be
  avoided.

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• Properties of Transformer or Insulating Oil
  
• Some specific parameters of transformer or
  insulating oil should be considered to determine
  the serviceability of that oil.
• Physical Parameters Colour and Appearance,
  Density, Inter Facial Tension, Viscosity, Flash
  Point and Pour Point.
• Chemical Parameters - Water Content, Corrosive
  Sulphur, Acidity, Sludge Content.
• Electrical Parameters Dielectric Strength,
  Specific Resistance, Dielectric Dissipation
  Factor.
• Dissolved gas analysis
• Furan analysis
• PCB analysis

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• The Furan and DGA tests are specifically not
  for determining the quality of transformer oil,
  but for determining any abnormalities in the
  internal windings of the transformer or the paper
  insulation of the transformer, which cannot be
  otherwise detected without a complete overhaul of
  the transformer.
• Dissolved Gas Analysis or DGA of Transformer Oil
• Dissolved gas analysis determines the
  concentrations of certain gases in the oil such
  as nitrogen, oxygen, carbon monoxide, carbon
  dioxide, hydrogen, methane, ethane, ethylene and
  acetylene The concentrations and relative ratios
  of these gases can be used to diagnose certain
  operational problems with the transformer, which
  may or may not be associated with a change in a
  physical or chemical property of the insulating
  oil.

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Sigma Test Research Centre

• Address BA-15, Mangolpuri Industrial Area
  Phase-II Delhi-110034(India)
• Ph No 91-11-49491414/15
• Fax [phone]
• Email info_at_sigmatest.org
• Email rahul_at_sigmatest.org
• Website www.sigmatest.org,
• http//www.sigmatest.org/Transformer-oil-Testing-I
  ndia.html
• Contact person Mr. Rahul GuptaMobile 91-
  9811565000