ABB REX 521 Technical Reference Manual, Standard Configurations page 87

1MRS 751802-MUM Protection Relay
Technical Reference Manual, Standard Configurations
Auto-reclosure function, O->I
Number of reclosures
Initiation mode
AR1, AR2, AR3, AR4 starting line operation
mode
AR1 AR2, AR3, AR4 start delay
Dead time
Synchro-check
Discriminating time td
Operation accuracy
The AR function is initiated internally from the protection functions or externally
with the digital inputs. The initiation signals are selected in the input SWGRP.
Activation and alarm signals can be routed to the output relays via the output
SWGRP selection.
The re-open (ROPEN) signal is connected directly to the HSPO1. The reclose signal
is routed to the close signal which can be connected to the output relays. The reclose
signal is depended on the interlocking scheme chosen for the control (COCB)
function. (See Fig. 7.1.10.-2.) Note that the open and the trip signal always overrides
the reclose and the close signal.
Sometimes it can be useful to get indications on the display cleared after a successful
auto-reclosing. This can be done by selecting O->1 in input SWGRP Reset
indications. By default this option is disabled.
Note that CB open and CB close have been disabled in the REX 521 via the auto-
reclose function.
Input SWGRP
O->I 3I> Start
O->I 3I>> Start
O->I 3I>>> Start
.
.
Initiation signals
.
DI1...DI9
Ext. start
O->I Trip 3I>
O->I Trip 3I>>
O->I Trip 3I>>>
.
.
.
DI1...DI9
Ext. trip
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0...5
Trip
Start
No operation
AR shot initiated
Initiation of AR shot blocked
0...10.00 s
0.20...300.00 s
Not in use; ARSYNC in use
0...30.00 s
±1% of setting value or ±30 ms
O-->I
AR1
DEFTRIP
AR2
LOCKOUT
AR3
ROPEN
AR4
RCLOSE
SHOT1
DI1...DI9
ARINH
SHOT2
DI1...DI9
ARON
SHOT3
SHOT4
CB pos. open
CBOPEN
SHOT5
CB pos. close
CBCLOSE
AR1TRIP
Reset AR2TRIP
RESET
AR3TRIP
AR4TRIP
CB FAIL
DEFTRIP
LOCKOUT
TRDUE
TDDUE
ACTIVE
SHOT_ALARM
REX 521
Output SWGRP
O->1 Active
SHOT1
SHOT2
SHOT3
SHOT4
SHOT5
TRDUE
TDDUE
ACTIVE
O->1 Alarm 1
AR1TRIP
AR2TRIP
AR3TRIP
AR4TRIP
CBFAIL
DEFTRIP
LOCKOUT
SHOT_ALARM
O->1 Alarm 2
AR1TRIP
AR2TRIP
AR3TRIP
AR4TRIP
CBFAIL
DEFTRIP
LOCKOUT
SHOT_ALARM
Autorclose
87