P.12.17
Date Code 20151029 Protection Manual SEL-411L Relay
Bay Control
Bay Control Front-Panel Operations
Figure 12.8 Screens for Circuit Breaker Selection
Single-Pole Tripping
With this type of breaker, the individual poles operate independently, and
normal operation is for one pole to be open for a short period, while the other
two poles are closed. However, it is possible that one (or more) poles may fail
to complete a particular operation, resulting in a pole-discrepancy condition.
For example, if the breaker is issued a CLOSE command, two poles may
close but one pole may remain open. If this condition lasts for longer than
1.5 seconds, the HMI displays the pole discrepancy screen shown in
Figure 12.9 (c) so that the operator can immediately identify the offending
<BAYNAME> <BAYNAME>
TRIP BREAKER
CLOSE BREAKER
STATUS
<BECTLNM>
PRESS TO ACTIVATE
BAY not in
LOCAL Control!
Cannot issue
controls.
Press Enter with breaker
highlighted
Highlighted
(breaker
example)
(a) Bay Screen
(c) LOCAL bit NOT asserted
(b) Breaker Control Screen
If LOCAL
bit asserted
If LOCAL bit
NOT asserted
After message timeout,
screen (a) is displayed
m = 1–3
n = 01–10
e = 1–2
<BAY 1>
BUSNAM1
<DmHMIN>
BUSNAM2
ESCNAVIG
I:99999 A
V:99999 kV
P:99999 MW
Q:99999 MV
<DnHMIN>
<DnHMIN>
<BmHMINM>
<DnHMIN>
To Next Page
Loading...
