GE 750, Quick Reference Manual

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Advanced EnerVista 750/760 Setup features
750/760 Quick Reference Guide 27
• Event Recorder : The event recorder captures contextual data associated with the last
512 events, listed in chronological order from most recent to the oldest.
• Oscillography : The oscillography waveform traces and digital states provide a visual
display of power system and relay operation data captured during specific triggered
events.
Waveform capture (trace memory)
The EnerVista 750/760 Setup software can be used to capture waveforms (or view trace
memory) from the 750/760 relay at the instance of a trip. A maximum of 512 cycles can be
captured and the trigger point can be adjusted to anywhere within the set cycles. A
maximum of 16 waveforms can be buffered (stored) with the buffer/cycle trade-off.
The following waveforms can be captured:
•
Phase A, B, and C currents ( I
a
, I
b
, and I
c
)
• Ground and Sensitive ground currents ( I
g
and I
sg
)
• Phase A-N, B-N, and C-N voltages ( V
a
, V
b
, and V
c
)
• Digital data for output relays and contact input states.
The following procedure describes the waveform capture feature.
1.
With EnerVista 750/760 Setup running and communications established, select the
Actual > Waveform Capture menu item to open the waveform capture setup
window:
Click on Trigger Waveform to trigger a waveform capture.
The waveform file numbering starts with the number zero in the 750/760; therefore,
the maximum trigger number will always be one less then the total number triggers
available.
2. Click on the Save to File button to save the selected waveform to the local PC. A new
window will appear requesting for file name and path. The file is saved as a CSV
(comma delimited values) file, which can be viewed and manipulated with compatible
third-party software.
Number of available files
Files to be saved or viewed Save waveform to a file