Trace Memory - GE 750 Instruction Manual

CHAPTER 5: SETPOINTS
5.2.5

Trace Memory


TRACE MEMORY
Note
NOTE
750 FEEDER MANAGEMENT RELAY – INSTRUCTION MANUAL

PATH: SETPOINTS S1 RELAY SETUP
[]
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
The waveform capture feature is similar to a transient/fault recorder. It captures
oscillography/waveform data in response to a variety of system events. Data is captured
for the analog current and voltage inputs (Ia, Ib, Ic, Ig, Isg, Va, Vb, Vc, Vs) as well as digital
data for the output relays and input contact states. The trace memory data can be
downloaded to the EnerVista 750/760 Setup software for display and diagnostics
purposes. All data is stored in volatile RAM memory which means that the information is
lost when power to the relay is lost. The amount of data to capture and the trigger point
are configurable as described below.
• BUFFER ORGANIZATION: Selects the partitioning of waveform capture data storage.
The first number indicates the number of events that can be stored in memory. The
second number indicates the number of data samples captured per channel for each
event. Note that the relay captures 16 samples per cycle. When more waveform
captures are triggered than the allowable number of events selected by this setpoint,
the oldest data is discarded to make room for the new capture.
For example, 4 × 2048 indicates that the last three events with 2048 data samples per
channel (128 cycles) can be stored in memory. Note that one buffer must be reserved
for capturing the next event.
• TRIGGER POSITION: Selects the amount of data captured before the trigger point. For
example, if the
TRIGGER POSITION
to "2 × 4096", then there will be 1024 samples (64 cycles) captured before the trigger
point.
Changing any setpoint affecting trace memory operation clears any data that is currently
in the log.
The
TRIGGER ON <EVENT_TYPE>
waveform captures.

TRACE MEMORY
BUFFER ORGANIZATION:
16 x 512
TRIGGER POSITION:
25%
TRIGGER ON PICKUP:
Enabled
TRIGGER ON DROPOUT:
Disabled
TRIGGER ON TRIP:
Enabled
TRIGGER ON ALARM:
Enabled
TRIGGER ON CONTROL:
Enabled
is set to "25%" and the
setpoints select specific event types to trigger new
S1 RELAY SETUP
Range: 2 x 4096, 4 x 2048, 8
x 1024, 6 x 512
Range: 0 to 100% in steps of
1
Range: Enabled, Disabled
Range: Enabled, Disabled
Range: Enabled, Disabled
Range: Enabled, Disabled
Range: Enabled, Disabled
is set
BUFFER ORGANIZATION
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