P54x/EN PL/La4 Programmable Logic
(PL) 7-34
MiCOM P543, P544, P545 & P546
PL
DDB no. English text Source Description
864 IA< Start Undercurrent
A phase undercurrent level detector pickup
(detects low current). It is used for breaker
failure in models with one CT input and also it
is used for fault record reset (as the sum CTs
in models with two CTs)
865 IB< Start Undercurrent
B phase undercurrent level detector pickup
(detects low current). It is used for breaker
failure in models with one CT input and also it
is used for fault record reset (as the sum CTs
in models with two CTs)
866 IC< Start Undercurrent
C phase undercurrent level detector pickup
(detects low current). It is used for breaker
failure in models with one CT input and also it
is used for fault record reset (as the sum CTs
in models with two CTs)
867 CB1 IA< Start Undercurrent
A phase undercurrent level detector pickup
(detects low current in CT1). It is used for
breaker failure in models with two CT inputs
P544 and P546 only
868 CB1 IB< Start Undercurrent
B phase undercurrent level detector pickup
(detects low current in CT1). It is used for
breaker failure in models with two CT inputs
P544 and P546 only
869 CB1 IC< Start Undercurrent
C phase undercurrent level detector pickup
(detects low current in CT1). It is used for
breaker failure in models with two CT inputs
P544 and P546 only
870 CB2 IA< Start Undercurrent
A phase undercurrent level detector pickup
(detects low current in CT2). It is used for
breaker failure in models with two CT inputs
P544 and P546 only
871 CB2 IB< Start Undercurrent
B phase undercurrent level detector pickup
(detects low current in CT2). It is used for
breaker failure in models with two CT inputs
P544 and P546 only
872 CB2 IC< Start Undercurrent
C phase undercurrent level detector pickup
(detects low current in CT2). It is used for
breaker failure in models with two CT inputs
P544 and P546 only
873 ISEF< Start Undercurrent
SEF undercurrent level detector pickup
(detects low current in CT SEF)
874 to 875 Not used
876 Z1X Active Zone 1 Extension Scheme
Zone 1 extension active - zone 1 is operating
in its reach extended mode
877 TOC Active Trip on Close
Trip on close functions (either SOTF or TOR)
active. These elements are in-service for a
period of time following circuit breaker closure
878 TOR Active Trip on Close
Trip on re-close protection is active - indicated
TOC delay timer has elapsed after circuit
breaker opening, and remains in-service on
auto-reclosure for the duration of the trip on
close window
879 SOTF Active Trip on Close
Switch on to fault protection is active - in
service on manual breaker closure, and then
remains
in-service for the duration of the trip on close
window
880 SysChks Inactive (CB1) Check Sync
System checks inactive (output from the check
synchronism, and other voltage checks)
881 CS1 Enabled (CB1) PSL Check sync. stage 1 enabled
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