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CHAPTER 4: INTERFACES
489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL
4–33
4.6
Advanced EnerVista 489 Setup Features
4.6.1
Triggered Events
While the interface is in either on-line or off-line mode, data generated by triggered
specified parameters can be viewed and analyzed via one of the following:
•
Event Recorder
: The event recorder captures contextual data associated with the
last 256 events, listed in chronological order from most recent to the oldest.
•
Oscillography
: The oscillography waveform traces provide a visual display of
power system and relay operation data captured during specific triggered events.
4.6.2
Waveform Capture (Trace Memory)
The EnerVista 489 Setup software can be used to capture waveforms (or view trace
memory) from the 489 relay at the instance of a trip. A maximum of 128 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
)
• Neutral end A, B, and C currents (
I
neutral_a
,
I
neutral_b
, and
I
neutral_c
)
• Ground currents (
I
g
)
• Phase A-N, B-N, and C-N voltages (
V
a
,
V
b
, and
V
c
)
Z
With EnerVista 489 Setup running and communications established,
select the
Actual > Waveform Capture
menu item to open the
waveform capture setup window:
Z
Click on
Trigger Waveform
to trigger a waveform capture.
The waveform file numbering starts with the number zero in the 489; therefore, the
maximum trigger number will always be one less then the total number triggers
available.
Number of available files
Files to be saved or viewed
Save waveform to a file