Alstom MiCOM P546 - 3.6.9.3 InterMiCOM64 application example - distance blocking; 3.6.9.4 InterMiCOM64 application example - directional earth Fault (DEF) POR permissive overreach; 3.6.9.5 InterMiCOM64 application example - directional earth fault (DEF) blocking; 3.6.9.6 InterMiCOM64 application example - delta directional POR permissive overreach

Application Notes P54x/EN AP/La4
MiCOM P543, P544, P545 & P546
(AP) 6-71
AP
3.6.9.3 InterMiCOM
64
application example - distance blocking
 Dist dly (50Hz) = 25 ms + MUX
 Dist dly (60Hz) = 22 ms + MUX
 tREV. Guard = 25 ms + MUX
3.6.9.4 InterMiCOM
64
application example - directional earth Fault (DEF) POR permissive overreach
 DEF dly = zero
 tREV. Guard = 50 ms + MUX
3.6.9.5 InterMiCOM
64
application example - directional earth fault (DEF) blocking
 DEF dly = 25 ms + MUX
 tREV. Guard = 35 ms + MUX
3.6.9.6 InterMiCOM
64
application example - delta directional POR permissive overreach
 Delta dly = zero
 tREVERSAL GUARD = 40 ms + MUX
3.6.9.7 InterMiCOM
64
application example - delta directional blocking
 Delta dly = 14 ms + MUX
 tREVERSAL GUARD = 25 ms + MUX
Note: When adding any multiplexer delays, the maximum response time of
the multiplexed link should be assumed. This should include any
addition for rerouting in self-healing networks.
3.6.10 Fallback mode for InterMiCOM
64
bits
On temporary loss of the InterMiCOM
64
channel, the user may select to latch the last healthy
signal for a period of time, or to fallback to a chosen default value.
For Intertripping schemes, reverting to a default state of 0 is recommended;
For Blocking schemes set, reverting to a default state of 1 is recommended;
For Permissive applications, latching the last healthy received state is recommended.