GE TRANSFORMER MANAGEMENT RELAY 745 Instruction Manual page 142

5.7 S5 OUTPUTS
5
PATH: SETPOINTS S5 OUTPUTS
TRACE MEMORY
[ENTER] for more
Trace memory is the oscillography feature of the 745. All system inputs are synchronously digitized at a sampling rate of 64
times a power cycle. Upon occurrence of a user-defined trigger condition, the 16 cycles of oscillography waveforms are
captured into trace memory. The trigger condition is defined by a FlexLogic™ equation, and the number of pre-trigger
cycles of data captured is programmable.
This section contains the settings (including the FlexLogic™ equation) to configure trace memory triggering.
• NO. OF PRE-TRIGGER CYCLES: Enter the number of cycles of data, of the 16 cycles of waveform data to be cap-
tured, that are to be pre-trigger information.
5-92
Courtesy of NationalSwitchgear.com
Figure 5–46: SELF-TEST RELAYS SCHEME LOGIC
TRACE MEMORY
ð
NO. OF PRE-TRIGGER
ENTER
CYCLES: 12 cycles
ESCAPE
TRACE TRIG FLEXLOGIC
ESCAPE
01: Any Element PKP
MESSAGE
↓
OUTPUT 1 FLEXLOGIC
ESCAPE
10: END
MESSAGE
745 Transformer Management Relay
5.7.5 TRACE MEMORY
Range: 1 to 15 in steps of 1
Range: any FlexLogic™ input or gate
Range: any FlexLogic™ input or gate
5 SETPOINTS
GE Multilin