Hot Spot Rise Over Top Oil; Winding Rise Time Constant - Advanced Power technologies TTC-1000 Instruction & Operation Manual

4.4.3 Hot Spot Rise over Top Oil

The Hot Spot Rise over Top Oil setting is either a number that can be obtained
from the transformer manufacturer, deduced from heat run data or estimated in
the range of 18 to 22 º C.
Programming WINDINGRISE from the front panel, press the
the setting 150 is displayed:
Press the YES button. The first digit will flash. Use the
scroll through the digits 0 – 9. Use the
digits. The currently active digit will flash. Press YES after you have entered all
digits.
For programming from a PC just type the Winding Rise @ Rated Load on the
"Enter:" line as follows:
This will program the hot spot rise to 20 degrees Celsius.

4.4.4 Winding Rise Time Constant

The Winding Rise Time Constant is the amount of time, in minutes, for the
winding hot spot temperature to reach 63 percent of its final value. A number of
factors including the volume and type of oil used and the mass of the transformer
are factors that influence this setting. Because calculating this value is
cumbersome, we recommend a setting from 5 to 10 minutes if the transformer
manufacturer has not provided the actual value.
Programming WINDING TC from the front panel, press the
the setting 151 is displayed:
Press the YES button. The first digit will flash. Use the
scroll through the digits 0 – 9. Use the
digits. The currently active digit will flash. Press YES after you have entered all
digits.
For programming from a PC just type the Winding TC on the "Enter:" line as
follows:
PRGM SETTING 150
WINDINGRISE=00
Enter:150/20
PRGM SETTING 151
WINDINGTC=000MIN
38
C
º
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or
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or buttons to scroll between the
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or
 
or buttons to scroll between the

arrow button until
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arrow buttons to

arrow button until

arrow buttons to
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