
V6.230 20131017
39
entered, “Enter Code:” will be displayed until Enter is pressed without data. To
start the scrolling again, simply type “+” followed by Enter.
4.3
Firmware Version from the Front Panel
The firmware version can be obtained from the front panel by pressing
the
or
arrow buttons until the following screen is displayed:
Where X’s give the version number of the installed firmware such as TTMV6.23.
4.4
Settings for Calculated Winding Temperature
Models equipped with the Aux CT inputs are supplied with split core CT’s for
each input which are snapped over the secondary leads from the bushing CT.
The first three CT inputs have settings for CT ratio, full load current, and hot spot
rise over top oil. The remainder are regular load set points. You may skip this
section if your model does not contain this feature. The winding hot spot
temperature is calculated using the measured load current and top oil
temperature along with certain settings including the primary CT ratio, hot spot
rise over top oil temperature at rated load, rated load current, winding rise time
constant and if the transformer cooling is directed FOA or FOW.
The ranges for these settings are:
Setting
Setting Range
Comments
CT Ratio
1:1 to 9999:1
Can be set to 0
Hot Spot Rise over Top Oil
0 to 99
C
18 to 22
C
Rated Load Current
0 to 65,535 A
Enter top rating
Winding Rise Time Constant
0 to 999 minutes Minimum 32msec
m Constant
0.8 or 1
Table 4.1: Setting Ranges
FIRMWARE VERSION
VER: TTMV X.XXXX
Содержание TTC-1000
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