Sel 411L - Page 589

P.7.21
Date Code 20151029 Protection Manual SEL-411L Relay
Front-Panel Operations
Front-Panel Menus and Screens
By default, three SER events are shown per screen. You can change this to five
per screen by setting front-panel setting SER_PP to Y. This will cause the
element name and state information to be shown on the same line, with the
element name truncated to ten characters and the state truncated to eight
characters.
Breaker Monitor
The relay features an advanced circuit breaker monitor. Select BREAKER
MONITOR
screens from the MAIN MENU to view circuit breaker monitor alarm
data on the front-panel display.
Figure 7.25 shows sample breaker monitor display screens. The
BKR n ALARM
COUNTER
screen displays the number of times the circuit breaker exceeded
certain alarm thresholds (see Circuit Breaker Monitor on page P.9.1).
If you have two circuit breakers, have set NUMBK := 2, and have enabled the
monitoring of both breakers (SET M), the alarm submenu in Figure 7.25
appears first. Use the navigation pushbuttons to choose either
Circuit
Breaker 1
or Circuit Breaker 2. Press ENT to view the selected circuit
breaker monitor information. An example of the
Circuit Breaker 1 ALARM
COUNTER
screen for a single-pole tripping circuit breaker is shown on the right
side of Figure 7.25.
Figure 7.25 BREAKER MONITOR Report Screens
Relay Elements
(Relay Word Bits)
You can view the RELAY ELEMENTS screen to check the state of the Relay Word
bits in the relay. The relay has two unique manual-scrolling features for
viewing these elements:
➤ Accelerated navigation
➤ Search
These Relay Word bit scrolling features make selecting elements from among
the many relay targets easy and efficient. Figure 7.26 shows an example of the
RELAY ELEMENTS screen. If an alias exists for an element, the alias name is
displayed instead of the element name. The asterisk (*) in Figure 7.26
indicates that this Relay Word bit position is reserved for future use.
BREAKER 1
BREAKER 2
BKR ALARM SUBMENU
BKR 1 ALARM COUNTER
ALARM COUNT
MECH. OP. TIME 0
ELEC. OP. TIME 0
BKR INACTIVITY 0
POLE SCATTER 0
POLE DISCREPANCY 0
MOTOR RUNTIME 0
CURRENT
INTERRUPTED 0
LAST RESET:
03/15/2001 00:01:00