Advanced enerVista 745 Setup Features
745
Transformer Management Relay
Interfaces
http://www.GEindustrial.com/multilin
4–25
GE Multilin
7. From the window main menu bar, press the Preference button to open the
Comtrade Setup page to change the graph attributes.
8. The following window will appear:
Change the Color of each graph as desired, and select other options as
required, by checking the appropriate boxes. Click OK to store these graph
attributes, and to close the window.
9. The Waveform Capture window will reappear with the selected graph attributes
available for use.
Trending (Data Logger) The trending or data logger feature is used to sample and record up to eight actual
values at an interval defined by the user. Several parameters can be trended and
graphed at sampling periods ranging from 1 second up to 1 hour. The parameters
which can be trended by the enerVista 745 Setup software are:
• Currents/Voltages:
I
a
, I
b
, I
c
, I
n
, and I
g
currents for Windings 1, 2, and 3
Positive-, negative-, and zero-sequence currents for Windings 1, 2, and 3
I
a
, I
b
, and I
c
differential and restraint currents
System frequency
Frequency decay rate
• Harmonics:
Total harmonic distortion (THD)
Harmonic derating factor
• Temperature:
Ambient Temperature
Hottest-Spot Winding Temperature
RTDs 1 through 12
Preference button
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