CHAPTER 4: INTERFACES
745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
•
Currents/voltages:
–
I
, I
, I
, I
, and I
currents for windings 1, 2, and 3
a
b
c
n
g
–
Positive-, negative-, and zero-sequence currents for windings 1, 2, and 3
–
I
, I
, and I
differential and restraint currents
a
b
c
–
System frequency
–
Frequency decay rate
•
Harmonics:
–
Total harmonic distortion (THD)
–
Harmonic derating factor
•
Temperature:
–
Ambient temperature
–
Hottest-spot winding temperature
–
RTDs 1 through 12
•
Demand:
–
Current demand for Windings 1, 2, and 3
•
Others:
–
Analog inputs 1, 2, 3, and 4
–
Accumulated loss-of-life
–
Aging factor
–
Tap changer position
With EnerVista 745 Setup running and communications established,
select the Actual Values > Trending menu item to open the trending
window.
To prepare for new trending, select Stop to stop the data logger and
Reset to clear the screen.
Select the graphs to be displayed through the pull-down menu beside
each channel description.
Select the sample rate through the pull-down menu.
ADVANCED ENERVISTA 745 SETUP FEATURES
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