Areva MiCOM P441, Technical Manual

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Application Notes P44x/EN AP/E33
MiCOM P441/P442 & P444 Page 147/220
FIGURE 105
To inhibit the discrimination timer logic (fixed logic) ; the value should be equal to the 1P
cycle dead time. (1P Dead Time 1).
AR Enable
Indicates that the autoreclose function is in service. (See Figure 90)
AR SPAR Enable
Single pole AR is enabled. (See Figure 88)
AR TPAR Enable
Three poles AR is enabled. (See Figure 89)
AR Lockout
If protection operates during the reclaim time, following 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, AR Lockout. Secondly, the DDB: BAR input
will block autoreclose and cause a lockout if autoreclose 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. (See Figure 79 & Figure
80)