Sel SEL-451-5, Manual

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Schweitzer Engineering Laboratories, Inc. SEL-451 Data Sheet
11
The LCD is controlled by the navigation pushbuttons
(
Figure 14 ), automatic messages the relay generates, and pro-
grammable analog and digital display points. The rotating
display scrolls through the bay screen, alarm points, display
points, and metering screens. Each display remains for an
adjustable time (1–15 seconds) before the display continues
scrolling. Any message generated by the relay because of an
alarm condition takes precedence over the rotating display.
Close-up views of the front panel of the SEL-451 are
shown in
Figure 12 , Figure 13 , and Figure 14 . The front
panel includes a 128 x 128 pixel, 3" x 3" LCD screen;
LED target indicators; and pushbuttons with indicating
LEDs for local control functions. The asserted and deas-
serted colors for the LEDs are programmable. Configure
any of the direct-acting pushbuttons to navigate directly
to an HMI menu item, such as events, bay display, alarm
points, display points, or the SER.
Status and Trip Target LEDs
The SEL-451 includes programmable target LEDs, as
well as programmable direct-action control pushbut-
tons/LEDs on the front panel. These LEDs and pushbut-
tons are shown in
Figure 12 and Figure 13 . Default
Target LED assignments are explained in Table 2 .
The SEL-451 features a versatile front panel that you can
customize to fit your needs. Use SEL
OGIC
control equa-
tions and slide-in configurable front-panel labels to
change the function and identification of target LEDs and
operator control pushbuttons and LEDs. The blank slide-in
label set is included with the SEL-451. Label sets can be
printed from a laser printer using templates supplied with the
relay or hand labeled on supplied blank labels.
Figure 12 Factory-Default Status and Trip Target LEDs
(8 Pushbutton, 16 Target Option)
Figure 13 Factory-Default Status and Trip Target LEDs
(12 Pushbutton, 24 Target Option)
Figure 14 Front-Panel Display and Pushbuttons
ENABLED
TRIP
INST
TIME
COMM
SOTF
NEG-SEQ
79 RESET
79 CYCLE
79 LOCKOUT
A FAULT
B FAULT
C FAULT
GROUND
LOP
VAY ON
VBY ON
VCY ON
03/15/01 GROUP 1
00:00:05.387
EVENT: BCG T
LOCATION: 48.47
FREQ: 60.00
SHOT: 3P=1
BK1 OPEN
BK2 CLOSED
EVENT SUMMARY 10002
Table 2 Description of Factory-Default Target LEDs
Target LED Function
ENABLED
Relay powered properly and self-tests okay
TRIP Indication that a trip occurred
INST High-speed rip
TIME Time-delayed trip
COMM
Communications-assisted trip
SOTF
Switch-onto-fault trip
RECLOSER
79 RESET
79 CYCLE
79 LOCKOUT
Ready for reclose cycle
Control in cycle state
Control in lockout state
PHASE
A, B, C
GROUND
Phases involved in fault
Ground involved in fault
LOP
Loss-of-potential condition
VOLTAGES
VAY ON, VBY
ON, VCY ON
VAZ ON
a
, VBZ
ON
a
, VCZ ON
a
a
Only available in 24-LED models.
VY phase filtered instantaneous voltages
applied
VZ phase filtered instantaneous voltages
applied
BKR FAIL
a
Breaker Failure trip
BKR MAINT
a
Breaker maintenance needed
EXT TRIP
a
External trip detected
51 TIMING
a
51 element picked up and timing
IRIG LOCKED
a
IRIG synchronization detected