P.8.18
SEL-411L Relay Protection Manual Date Code 20151029
Oscillography, Events, and SER
Event Reports, Event Summaries, and Event Histories
Figure 8.8 contains selected data from the analog section of a 4-samples/cycle
event report for a fault on a line. The bracketed numbers at the left of the
report (for example, [11]) indicate the cycle number; Figure 8.8 presents
eleven cycles of 4-samples/cycle data.
The trigger row includes a > character following immediately after the
V1Mem column to indicate the trigger point. This is the dividing point
between the prefault or PRE time and the fault or remainder of the data
capture.
The row that the relay uses for the currents in the event summary is the row
with the largest current magnitudes; the relay marks this row on the event
report with an asterisk (*) character immediately after the V1Mem column.
The (*) takes precedence over the > if both occur on the same row in the
analog section of the event report.
Table 8.5 Event Report Metered Analog Quantities
Quantity Description
IA Instantaneous filtered line current, A-phase
IB Instantaneous filtered line current, B-phase
IC Instantaneous filtered line current, C-phase
IG Instantaneous filtered line current, residual (or ground)
VA Instantaneous filtered A-phase voltage
VB Instantaneous filtered B-phase voltage
VC Instantaneous filtered C-phase voltage
VS1 Instantaneous filtered synchronization Source 1 voltage
VS2 Instantaneous filtered synchronization Source 2 voltage
V1Mem Instantaneous memorized positive-sequence polarization voltage
Table 8.6 87L Event Report Analog Quantities (Sheet 1 of 2)
Quantity Description
IAL Filtered total local current phasor, Phase A
IBL Filtered total local current phasor, Phase B
ICL Filtered total local current phasor, Phase C
IQ Filtered total negative-sequence current phasor
IG Filtered total zero-sequence current phasor
IAR1 Terminal 1, filtered total remote current, Phase A
IBR1 Terminal 1, filtered total remote current, Phase B
ICR1 Terminal 1, filtered total remote current, Phase C
IQR1 Terminal 1, filtered total negative-sequence current
IGR1 Terminal 1, filtered total zero-sequence current
IAR2 Terminal 2, filtered total remote current, Phase A
IBR2 Terminal 2, filtered total remote current, Phase B
ICR2 Terminal 2, filtered total remote current, Phase C
IQR2 Terminal 2, filtered total negative-sequence current
IGR2 Terminal 2, filtered total zero-sequence current
IAR3 Terminal 3, filtered total remote current, Phase A
IBR3 Terminal 3, filtered total remote current, Phase B
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