Rogers Ratio Method

The Rogers Ratio method is another ratio method very similar to the Dornenburg method however only having the three ratios R1:CH₄/H₂, R2:C₂H₂/C₂H_4, R5:C₂H₄/C₂H₆. IEEE standard C57.104 has the following flowchart to explain the process.

Figure 1

Figure 2 below also taken from IEEE standard C57.104 provides a tabular list of the different conditions of the transformer based on the three ratios.

Figure 2

Use the following link to the "Analysis" section to get the Rogers Ratio diagnosis of the oil samples. Enter the oil sample under "Sample 5" to get the diagnosis.