GE Feeder Management Relay 750 User Manual

GE Multilin 750/760 Feeder Management Relay 5-11
5 SETPOINTS 5.2 S1 RELAY SETUP
5
5.2.5 TRACE MEMORY
PATH: SETPOINTS Ö S1 RELAY SETUP ÖØ TRACE MEMORY
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 750/
760PC 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 trig-
gered 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 × 1024 indicates that the last three events with 1024 data samples per channel (64 cycles) can be
stored in memory. Note that one buffer must be reserved for capturing the next event.
Changing this setpoint clears any data that is currently in memory.
• TRIGGER POSITION: Selects the amount of data captured before the trigger point. For example, if the
TRIGGER POSI-
TION is set to "25%" and the BUFFER ORGANIZATION is set to "2 × 2048", then there will be 512 samples (32 cycles) cap-
tured before the trigger point.
The TRIGGER ON <EventType> setpoints select specific event types to trigger new waveform captures
 TRACE MEMORY
 [ENTER] for more
BUFFER ORGANIZATION:
16 x 256
Range: 2 x 2048, 4 x 1024, 8 x 512, 16 x 256
TRIGGER POSITION:
25%
Range: 0 to 100% in steps of 1
TRIGGER ON PICKUP:
Enabled
Range: Enabled, Disabled
TRIGGER ON DROPOUT:
Disabled
Range: Enabled, Disabled
TRIGGER ON TRIP:
Enabled
Range: Enabled, Disabled
TRIGGER ON ALARM:
Enabled
Range: Enabled, Disabled
TRIGGER ON CONTROL:
Enabled
Range: Enabled, Disabled
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Courtesy of NationalSwitchgear.com

GE Feeder Management Relay 750 Specifications

General

Brand	GE
Model	Feeder Management Relay 750
Category	Protection Device
Language	English