Oil Quality Test (OQT) and Dissolved Gas Analysis (DGA)

Oil Quality Test (OQT) and Dissolved Gas Analysis (DGA)

Dissolved Gas Analysis is a form of predictive maintenance to diagnose the state of oil type transformer by determining various properties and gas contents in oil. These parameters are compared with IEEE and IEC guidelines to determine the quality of oil.

We follow strict standards in oil collection and all testing is done by accredited laboratory.

Sample Reference Historical

 Date Sampled  N/A  N/A  N/A  22/12/12  26/11/13  02/07/14  23/01/15
 Lab Reference  N/A  N/A  N/A  S42012  S60813  S72314  S87315

Dissolved Gas Analysis

 Hydrogen (H2)  N/A  N/A  N/A  98  68  28  18
 Methane (CH4)  N/A  N/A  N/A  9  20  12  9
 Ethylene (C2H4)  N/A  N/A  N/A  < 1  < 1  2  1
 Ethane (C2H6)  N/A  N/A  N/A  24  24  20  16
 Acetylene (C2H2)  N/A  N/A  N/A  < 1  < 1  < 1  < 1
 Carbon Monoxide (CO)  N/A  N/A  N/A  504  410  161  119
 Carbon Dioxide (CO2)  N/A  N/A  N/A  2152  1960  2000  1071
 Oxygen (O2)  N/A  N/A  N/A  < 500  3787  6415  18717
 Nitrogen (N2)  N/A  N/A  N/A  35891  74145  31512  47252
 Gas by Volume  N/A  N/A  N/A  3.89%  8.04%  4.02%  6.72%
 Total Combustible Gases  N/A  N/A  N/A  635  522  223  163

Font Colour Code

Font-Colour-Code-GoodStandard Test Result Indicates Oil In Service Is In “Good” Category / DGA Indicates Gas Within Typical Concentration Values

Font-Colour-Code-FairStandard Test Result Indicates Oil In Service Is In “Fair” Category / DGA Indicates Rate Of Gas &/Or Gas Ratio Within Allowable Limit

Font-Colour-Code-PoorStandard Test Result Indicates Oil In Service Is In “Poor” Category / DGA Indicates Fault Gas

Hydrogen
Methane
Ethylene
Ethane
Acetylene
Carbon Monoxide
Carbon Dioxide
Oxygen
Nitrogen