Sel SEL-787 - Figure 4.68 Display Point Settings; Figure 4.69 Front-Panel Display-Both HV and LV Breakers Open; Table 4.55 Entries for the Four Strings

4.100
SEL-787 Relay Instruction Manual Date Code 20150130
Protection and Logic Functions
Front-Panel Settings (SET F Command)
show: TRFR 1 HV BRKR: CLOSED. We also want similar displays for the LV
breaker.
After connecting a form a (normally open) auxiliary contact from the HV
circuit breaker to Input IN101 and a similar contact from the LV circuit breaker
to Input IN102 of the SEL-787, we are ready to program the display points,
using the following information for the HV breaker (LV breaker similar):
➤ Relay Word bit—IN101
➤ Alias—TRFR 1 HV BRKR:
➤ Set String—CLOSED (the form a [normally open] contact
asserts or sets Relay Word bit IN101 when the circuit breaker is
closed)
➤ Clear String—OPEN (the form a [normally open] contact
deasserts or clears Relay Word bit IN101 when the circuit
breaker is open)
Name, Alias, Set String, and Clear String
When all four strings have entries, the relay reports all states.
Figure 4.68 shows the settings for the example, using the SET F command.
Use the > character to move to the next settings category.
Figure 4.69 shows the display when both HV and LV breakers are open (both
IN101 and IN102 deasserted). Figure 4.70 shows the display when the HV
breaker is closed, and the LV breaker is open (IN101 asserted, but IN102 still
deasserted).
Figure 4.69 Front-Panel Display—Both HV and LV Breakers Open
Table 4.55 Entries for the Four Strings
Name Alias Set String Clear String
IN101 TRFR 1 HV BRKR CLOSED OPEN
=>>SET F TERSE <Enter>
Front Panel
General Settings
DISPLY PTS ENABL (N,1-32) EDP := 4 ? > <Enter>
•
•
•
Target LED Set
TRIP LATCH T_LED (Y,N) T01LEDL := Y ? > <Enter>
Display Point Settings (maximum 60 characters):
(Boolean): Relay Word Bit Name, "Alias", "Set String", "Clear String"
(Analog) : Analog Quantity Name, "User Text and Formatting"
DISPLAY POINT DP01 (60 characters)
DP01 := RID,"{16}"
? IN101,"TRFR 1 HV BRKR:",CLOSED,OPEN <Enter>
DISPLAY POINT DP02 (60 characters)
DP02 := TID,"{16}"
? IN102,"TRFR 1 LV BRKR:",CLOSED,OPEN <Enter>
DISPLAY POINT DP03 (60 characters)
DP03 := IAV, "IAV CURR {5} A"
? END <Enter>
Save changes (Y,N)? Y <Enter>
Settings Saved
=>>
Figure 4.68 Display Point Settings
TRFR 1 HV BRKR:= OPEN
TRFR 1 LV BRKR:= OPEN