Application Notes P54x/EN AP/La4
MiCOM P543, P544, P545 & P546
(AP) 6-81
AP
5.4.8 GROUP 1 AUTORECLOSE menu:
In the GROUP 1 AUTORECLOSE column, the following should be set :-
Num CBs (49 50): set Both CB1&CB2;
Lead/Foll ARMode (49 53): set L 1/3P, F 3P;
Leader Select By (49 55): set Menu;
Select Leader (49 56): set Sel Leader CB1;
BF if LFail Cls (49 57): set Enabled;
AR Shots (49 59): set 2;
Multi Phase AR (49 5C): set Allow Autoclose;
Discrim Time (49 5D): set 0.5 sec (set as per application requirements);
CB IS Time (49 60): set 5 sec (this requires the circuit breaker to have been in the
closed position for at least 5 seconds before fault occurrence will enable auto-reclose
initiation. It is designed to prevent auto-reclosure for a fault immediately after manual
circuit breaker closure (switch on to fault));
CB IS Memory Time (49 61): set 0.5 sec;
DT Start by Prot (49 62): set Protection Reset (measured dead time starts when
protection resets);
3PDTStart WhenLD (49 63): set Disabled;
DTStart by CB Op (49 64): set Disabled;
SP AR Dead Time (49 67): set 0.5 sec (typical);
3P AR DT Shot 1 (49 68): set 0.3 sec (or as per application requirements and
considerations at circuit breaker location);
3P
AR DT Shot 2 (49 68): set 60 sec (or as per application requirements and
considerations at the circuit breaker location);
Follower Time (49 6C): set 5 se” (typical);
SPAR ReclaimTime (49 6D): set 180 sec (or as required to suit circuit breaker duty
cycle);
3P AR ReclaimTime (49 6E): set 180 sec (or as required to suit circuit breaker duty
cycle);
AR CBHealthyTime (49 6F): set 0.3 sec;
AR CheckSyncTime (49 70): set 0.3 sec;
Z1 AR (49 72): set Initiate AR;
Diff AR (49 73): set Initiate AR;
Dist Aided AR (49 74): set Initiate AR;
All other protection inputs (Z2T AR (49 72) onwards) : set Block AR;
CB1L SC all (49 A6): set Enabled;
CB1L SC Shot 1 (49 A7): set Enabled;
CB1L SC ClsNoDly (49 A8): set Disabled;
CB1L SC CS1 (49 A9): set Enabled;
CB1L SC CS2 (49 AA): set Disabled;
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