Schweitzer Engineering Laboratories SEL-487V - Monitoring, Metering, and Sequencer

Schweitzer Engineering Laboratories, Inc. SEL-487V Data Sheet
11
Alarm Points
You can display messages on the SEL-487V front-panel
LCD that indicates alarm conditions in the power system.
The relay uses alarm points to place these messages on
the LCD.
Figure 12 shows a sample alarm points screen. The relay
is capable of displaying up to 66 alarm points. The relay
automatically displays new alarm points while in
manual-scrolling mode and in autoscrolling mode. The
alarm points message is user-configurable through SER
settings and can be triggered using inputs,
communications, or conditional logic using powerful
SEL
OGIC control equations. The asterisk next to the
alarm point indicates an active alarm. The inactive
alarms can be cleared using the front-panel navigation
buttons.
Figure 12 Sample Alarm Points Screen
Auxiliary Trip/Close Pushbuttons and
Indicating LEDs
Optional auxiliary trip and close pushbuttons (see
Figure 19 and Figure 20) and indicating LEDs allow
breaker control independent of the relay. The auxiliary
trip/close pushbuttons are electrically separate from the
relay, operating even if the relay is powered down. Make
the extra connections at Terminals 201 through 208. See
Figure 21 through Figure 22 for a rear-panel view.
Figure 13 shows one possible set of connections.
The auxiliary trip/close pushbuttons incorporate an arc
suppression circuit for interrupting dc trip or close
current. To use these pushbuttons with ac trip or close
circuits, disable the arc suppression for either pushbutton
by changing jumpers inside the SEL-487V. The
operating voltage ranges of the breaker CLOSED and
breaker OPEN indicating LEDs are also jumper selectable.
Figure 13 Universal Sequencer Capacitor Bank Staging
Universal Sequencer
The Universal Sequencer provides for the automatic
sequencing of as many as three capacitor bank stages.
The Universal Sequencer accumulates either time in
service or an analog quantity and prioritizes bank
insertion to the bank with the lowest accumulated value.
Bank removal can prioritize banks with the highest or
lowest accumulated value or by a predetermined sequence.
Trip/Close
Trip/Close
Trip/Close
52
52
52
SEL-487V