Settings P54x/EN ST/La4
MiCOM P543, P544, P545, P546
(ST) 4-59
ST
1.3.21.2 Auto-reclose function (P544/P546)
The MiCOM P544/P546can be set to initiate auto-reclose for fault clearances by Zone 1
trips, pha trips, distance aided tri zones, Aided DEF,
D ison, p earth overcu rip On Reclose (TOR).
T as
v
T ws the y settings for the se fu n, which m be set in
c e Circ eaker Control setti under main u. The av ble setting
r
Setting
se differential
irectional compar
ps, other distance
rrent protection and Thase and
his is configured in the settings (shown here after). Other protection functions such
oltage, frequency, thermal etc. will block auto-reclose.
he following sho
onjunction with th
rela
uit Br
auto-reclo
ngs
nctio
Men
ust
aila
anges and factory defaults are shown:
range
Menu text ult setting size Defa
Min. Max.
Step
Num CBs CB1 Only
CB1 only, CB2 only, Both
CB1 & CB2
Setting defines which CB(s) are active for the specific installation: CB1 only, CB2 only or
both CB1 & CB2.
Lead/Foll AR Mode L3P F3P
L1P F1P, L1P F3P, L3P F3P, L1/3P F1/3P,
L1/3P F3P, Opto.
Setting determines which auto-reclose modes are permitted for leader /follower circuit
breakers.
The auto-reclose scheme provides single phase or three phase auto-reclosing of a feeder
switched by two circuit breakers. The two circuit breakers are normally arranged to
reclose sequentially with ignated the ‘L reclosing after a set one, des eader’ circuit breaker,
dead time followed, if th B remains cl ircuit breaker, e leader C osed, by the second c
designated the ‘Follower’ circuit breaker after a further delay (follower time).
L1P F1P : both leader and follower are configured for single phase auto-reclosing.
L1P F3P : the leader is configured for single phase auto-reclosing, whilst the follower is
configured for three phase auto-reclosing.
L3P F3P : both leader a r are configu ee ph to-reclosind followe red for thr ase au ng.
L1/3P F1/3P : both leader and follower are configured for either single phase or three
phase auto-reclosing.
L1/3P F3P : the leader is configured for single phase or three phase auto-reclosing, while
the follower is configured for three phase auto-reclosing only.
Opto : the auto-reclosing mode of the leader and follower are controlled by opto input
signals (Opto) mapped via DDBs (1497) Lead AR 1P, (1498) Lead AR 3P, (1409)
Follower AR 1P, and (1410) Follower AR 3P.
AR Mode AR 3P
AR 1P, AR 1/3P, AR 3P,AR
Opto
If the Num CBs setting (cell 4950 {above} in the AUTORECLOSE column) is set to CB1
Only, or CB2 Only, then this setting determines which auto-reclose modes are permitted
for the circuit breaker : single phase (AR 1P) only, both single phase and three phase (AR
1/3P), three phase only (AR 3P), or the auto-reclosing mode is controlled by opto input
signals (Opto) mapped (1497) Lead d AR 3P. via DDBs AR 1P and (1498) Lea
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