Figure 13 Duval Triangles on the DGA Diagnostics Page
DGA Diagnostics
page shows the progression of selected data points from the past year
overlaid on top of Duval triangles:
•
Triangle 1
: Classic Duval triangle for DGA in oil-filled transformers using methane,
ethylene, and acetylene
•
Triangle 4
: Diagnosis of low-temperature faults in oil-filled transformers using hydrogen,
methane, and ethane
•
Triangle 5
: Diagnosis of low-temperature faults in oil-filled transformers using methane,
ethylene, and ethane
DGA monitor automatically selects the data points according to criteria described in section
Criteria for Data Points in DGA Diagnostics (page 24)
. The data points are listed in a table
below the triangles. Clicking a table row highlights the data point in the overlay and displays
the gas ratios as percentages.
3.1.3.1 Criteria for Data Points in DGA Diagnostics
DGA Diagnostics
view shows up to 24 data points from the past year. A data point that meets
selection criteria is automatically selected at roughly two week intervals. If less than one year
of data is available, all of the data is used.
OPT100 User Guide
M211858EN-E
24
Summary of Contents for Optimus OPT100
Page 1: ...M211858EN E User Guide Vaisala Optimus DGA Monitor for Transformers OPT100...
Page 24: ...Figure 11 Measurement Graph for 1 Day Rate of Change Values OPT100 User Guide M211858EN E 22...
Page 72: ...OPT100 User Guide M211858EN E 70...
Page 76: ...OPT100 User Guide M211858EN E 74...
Page 77: ......
Page 78: ...www vaisala com...
