GE P444 - Page 352

P
44x/EN PL/Hb6
Programmable Logic
(PL) 6
-32 MiCOM 40 Agile
P442, P444
Ordinal English Text Description Source
234 A/R Lockout
Autorecloser locked-out (no autoreclosure possible
until reset),
If protection operates during the reclaim time, after the
final reclose attempt, the relay will be driven to lockout
and the autoreclose function will be disabled until the
lockout condition is reset. This will produce an alarm:
A/R Lockout. Then, the DDB:'BAR' input will block the
autorecloser and cause a lockout if a reclose cycle is in
progress. Lockout will also occur if the CB energy is
low and the CB fails to close. Once the autorecloser is
locked out, it will not function until a Reset Lockout or
CB Manual Close command is received (depending on
the Reset Lockout method chosen in CB Monitor
Setup).
NOTE: Lockout can also be caused by the CB
condition monitoring functions maintenance lockout,
excessive fault frequency lockout, broken current
lockout, CB failed to trip and CB failed to close, manual
close no check synchronism and CB unhealthy.
Set to 1 = 'A/R Enable'
AND [ ('BAR' =1 (see internal logic)
OR '
A/R lockout shot> (AR lockout by number of shots)
OR
(No CB Healthy at the end of Inhibit Window (setting))
OR
(No 'CB discrepancy' (opto input or internal by CBAux
if present in PSL) at the end of 1P Dead time1)
OR
Trip 1P or3P maintained / still present at the end
of the1P or 3P Dead time) or after discrimination
time-delay if a 3-pole trip occurs during a 1-Pole AR
Cycle ]
At 0: AR activated
Reset to 0 = ('Reset 1P Trip' OR 'Reset 3P Trip') AND
(End of reclaim time) AND Reset (BAR) AND Reset
(A/R lockout shot>) AND Reset (No CB Healthy) AND
Reset (No Discrepancy)
PSL (OUT)
Autorecloser
229 A/R Reclaim
Internal autoreclose reclaim in progress (reclaim time
timeout in progress).
If it is assigned to an opto input in the PSL and when
energised, the DDB:‘A/R Reclaim’ signal will start the
internal logic TOR enable (External AR logic applied).
The DDB indicates the reclaim time following a
particular autoreclose shot is timing out. The DDB:'AR
Reclaim' output would be energised at the same
instant as any Cycle outputs are reset. ‘A/R Reclaim’
may be used to block low-set instantaneous protection
on autoreclosure, when it has not been time-graded
with a downstream protection. This technique is
commonly used when the downstream devices are
fuses, and fuse saving is implemented. This avoids
fuse blowing for transient faults.
‘A/R reclaim’ can be connected to Main2 for cycle in
progress external information. It initiates the internal
TOR logic
PSL (OUT)
Autorecloser