Alstom MiCOM P54 Series - Page 632

P54x/EN PL/La4 Programmable Logic
(PL) 7-98 MiCOM P543, P544, P545 & P546
DDB #744
Zone 1 N Start
DDB #748
Zone 2 N Start
DDB #752
Zone 3 N Start
DDB #760
Zone 4 N Start
DDB #777
IN>1 Start
DDB #778
IN>2 Start
DDB #779
IN>3 Start
DDB #780
IN>4 Start
1
Any Ground Start >> page 7
DDB #1013
Phase Select N
DDB #522
Any Trip
&
DDB #036
Input L5
DDB #1013
Phase Select N
DDB #522
Any Trip
Pulse
10
0
&
1
DDB #959
Started Phase N
DDB #444
Reset Relays/LED
DDB #781
ISEF>1 Start
DDB #782
ISEF>2 Start
DDB #783
ISEF>3 Start
DDB #784
ISEF>4 Start
Any Ground Start >> page 7
Any Ground Start >> page 7
Any Phase Start >> page 7
DDB #756
Zone P N Start
>> page5 Any Phase Start
N Phase Start >> page 7 then page 8 then page 9
This logic ensures correct N
indications for faults involving
ground. The pulse prevents pole
scatter affecting the N
indication.
This logic clears all latched indications
at the start of Any Trip
This reset
controls: Reset
latched relays,
Reset latched
LEDs.
&
DDB #1385
AR In Service
PL