Schweitzer Engineering Laboratories SEL-421-4 - Page 953

5.21
Date Code 20171006 Instruction Manual SEL-400 Series Relays
Control
Bay Control Front-Panel Operations
Figure 5.12 HMI Disconnect Operation Initiation
BAYNAME
OPEN DISCONNECT
CLOSE DISCONNECT
CLOSE COMMAND ISSUED
OPEN
DmCTLNM
IN PROGRESS
(d) Disconnect Control Screen
(c) Disconnect Control Screen
After three seconds,
screen (b) is displayed
Down button pressed
BAYNAME
OPEN DISCONNECT
CLOSE DISCONNECT
*NOT ALLOWED*
OPEN
DmCTLNM
NO LOCAL CONTROL
BAYNAME
OPEN DISCONNECT
CLOSE DISCONNECT
OPEN
DmCTLNM
PRESS TO ACTIVATE
(b) Disconnect Control Screen
BAYNAME
OPEN DISCONNECT
CLOSE DISCONNECT
OPEN
DmCTLNM
PRESS TO ACTIVATE
(a) Disconnect Control Screen
89OPN1
asserted
89OPN1
asserted
If 89CCM1
asserts, screen
(c) is displayed
89OIP1 asserted
and 89AL1 deasserted
If 89CCM1 does
not assert,
screen (d) is
displayed
Press ENTER with CLOSE
DISCONNECT highlighted