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Transformer Oil Gas Analyzer (TOGA) GC System - SRI Instruments
Nitrogen 76.65ppm
Methane 70.6ppb
Carbon monoxide 207.4ppb
Carbon dioxide 518ppb
Ethylene 120.9ppb
Ethane 120.7ppb
Acetylene 86.7ppb
In the TOGA GC, the transformer oil sample is injected by peristaltic pump through a unique gas extraction loop. The
gas extraction loop consists of permeation membrane tubing encapsulated in a trap-heated glass tube. The
permeation tubing is plumbed to the sample inlet, the dual 10-port valves, and the waste/sample outlet. Solenoid valves
are included for purging the gas extraction chamber with helium between runs.
While the transformer oil is being pumped through the gas extraction loop, the
10-port electrically actuated valves are in the LOAD position. During this time,
the dissolved gases in the transformer oil permeate through the membrane, into
the extraction chamber. When the valves are switched to the INJECT position,
the contents of the loop are swept into the Silica Gel and Molecular Sieve 13X
columns.