Shots Exceeded Logic; Ar Initiation Logic; Blocking Instantaneous Protection For Selected Trips; Figure 140: Shots Exceeded Logic - GE MiCOM P40 Agile Technical Manual

P14D
7.2.4

SHOTS EXCEEDED LOGIC

Main Protection Start
SC Count >= Main Shots
SEF Protection Start
SC Count >= SEF Shots
V00504

Figure 140: Shots Exceeded logic

7.2.5

AR INITIATION LOGIC

Auto Mode (int)
Lockout Alarm
Main Protection Trip
Main Protection Start
Main High Shots
SEF Protection Trip
SEF Protection Start
SEF High Shots
Sequence Co -ord
Enabled
Disabled
CB in Service
Autoreclose Inhibit
AR Restart
DAR Complete
Lockout Alarm
Reclaim Complete
Non Auto Mode
Autoreclose Disabled
Live Line Mode
V00505

Figure 141: AR initiation logic

7.3

BLOCKING INSTANTANEOUS PROTECTION FOR SELECTED TRIPS

Instantaneous protection may be blocked or not blocked for each trip in an Autoreclose cycle. This is selected
using the Trip (n) Main and Trip (n) SEF settings, where n is the number of the trip in the autoreclose cycle. These
allow the instantaneous elements of phase, earth fault and SEF protection to be selectively blocked for a CB trip
sequence. For example, if Trip 1 Main is set to No Block and Trip 2 Main is set to Block Inst Prot, the
instantaneous elements of the phase and earth fault protection will be available for the first trip but blocked
afterwards for the second trip during the Autoreclose cycle. The logic for this is shown below.
P14D-TM-EN-8
S
&
Q
R
&
S
Q
R
&
1
&
1
&
&
1 S
Q
R
S
Q
R
1
1
Number of Shots
Number SEF Shots
Increment on falling
edge
SC Counter
Reset
Chapter 13 - Autoreclose
Main High Shots
SEF High Shots
Autoreclose Start
DAR in Progress
Autoreclose Initiate
AR in Progress
AR SeqCounter 0
AR SeqCounter 1
AR SeqCounter 2
AR SeqCounter 3
AR SeqCounter 4
SC Count > 4
SC Count >= Main Shots
SC Count >= SEF Shots
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