9.12
SEL-787 Relay Instruction Manual Date Code 20150130
Analyzing Events
Event Reporting
Figure 9.4 and Figure 9.5 look in detail at an example of one cycle of A-phase
current (channel IA) data similar to what is shown in Figure 9.3. Figure 9.4
shows how the event report ac current column data relate to the actual sampled
waveform and rms values. Figure 9.5 shows how the event report current
column data can be converted to phasor rms values. Voltages are processed
similarly.
In Figure 9.4, note that any two rows of current data from the analog event
report, 1/4 cycle apart, can be used to calculate rms current values.
Logic Settings
ELAT := 4 ESV := 5 ESC := N EMV := N
SET01 := R_TRIG SV01T AND NOT LT01
RST01 := R_TRIG SV01T AND LT01
SET02 := R_TRIG SV02T AND NOT LT02 AND PB02
RST02 := R_TRIG SV02T AND LT02 AND PB02
SET03 := (PB03 AND R_TRIG SV02T) AND LT01 AND NOT (52A1 AND NOT LT02 OR 52A2 AND LT02)
RST03 := (R_TRIG SV02T OR SV03T) AND LT03
SET04 := (PB04 AND R_TRIG SV02T) AND (52A1 AND NOT LT02 OR 52A2 AND LT02)
RST04 := (R_TRIG SV02T OR SV04T) AND LT04
SV01PU := 3.00 SV01DO := 0.00
SV01 := PB01
SV02PU := 0.25 SV02DO := 0.00
SV02 := PB01 OR PB02 OR PB03 OR PB04
SV03PU := 0.00 SV03DO := 0.00
SV03 := LT03
SV04PU := 0.00 SV04DO := 0.00
SV04 := LT04
SV05PU := 0.25 SV05DO := 0.25
SV05 := (PB01 OR PB02 OR LT03 OR LT04) AND NOT SV05T
OUT101FS:= Y OUT101 := HALARM OR SALARM
OUT102FS:= N OUT102 := 0
OUT103FS:= N OUT103 := TRIPXFMR
=>
Figure 9.3 Example Standard 15-Cycle Analog Event Report 1/4-Cycle Resolution (Sheet 4 of 4)
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