Siemens 7SR11

7SR11 & 7SR12 Description Of Operation
©2012 Siemens Protection Devices Limited Chapter 1 Page 56 of 76
4.1.5 P/F Shots sub-menu
This menu allows the Phase fault trip/reclose sequence to be parameterized:-
79 P/F Prot’n Trip1 The first protection Trip in the P/F sequence can be set to either Inst or Delayed.
79 P/F Deadtime 1 Sets the first Reclose Delay (Dead time) in the P/F sequence.
79 P/F Prot’n Trip2 The second protection Trip in the P/F sequence can be set to either Inst or Delayed.
79 P/F Deadtime 2 Sets the second Reclose Delay (Dead time) in the P/F sequence.
79 P/F Prot’n Trip3 The third protection Trip in the P/F sequence can be set to either Inst or Delayed.
79 P/F Deadtime 3 Sets the third Reclose Delay (Dead time) in the P/F sequence.
79 P/F Prot’n Trip 4 The fourth protection Trip in the P/F sequence can be set to either Inst or Delayed.
79 P/F Deadtime 4 Sets the fourth Reclose Delay (Dead time) in the P/F sequence.
79 P/F Prot’n Trip5 The fifth and last protection Trip in the P/F sequence can be set to either Inst or
Delayed.
79 P/F HighSet Trips to Lockout Sets the number of allowed HighSet trips. The relay will go to Lockout on the
last HighSet Trip. This function can be used to limit the duration and number of high
current trips that the Circuit Breaker is required to perform, if the fault is permanent
and close to the Circuit Breaker then there is no point in forcing a number of Delayed
Trips before the Relay goes to Lockout – that sequence will be truncated.
79 P/F Delayed Trips to Lockout Sets the number of allowed Delayed trips, Relay will go to Lockout on the last
Delayed Trip. This function limits the number of Delayed trips that the Relay can
perform when the Instantaneous protection Elements are externally inhibited for
system operating reasons - sequences are truncated.
4.1.6 E/F Shots sub-menu
This menu allows the Earth Fault trip/reclose sequence to be parameterized:-
As above but E/F settings.
4.1.7 SEF Shots sub-menu
This menu allows the Sensitive Earth trip/reclose sequence to be parameterized:-
As above but SEF Settings, Note: - SEF does not have HighSets
4.1.8 Extern Shots sub-menu
This menu allows the External Protection auto-reclose sequence to be parameterized:-
79 P/F Prot’n Trip1 Not Blocked/Blocked - Blocked raises an output which can be mapped to a Binary
output to Block an External Protection’s Trip Output.
79 P/F Deadtime 1 Sets the first Reclose Delay ( Deadtime) for the External sequence.
79 P/F Prot’n Trip2 Not Blocked/Blocked - Blocked raises an output which can be mapped to a Binary
Output to Block an External Protection’s second Trip output.
79 P/F Deadtime 2 Sets the second Reclose Delay ( Deadtime) in the External sequence.
79 P/F Prot’n Trip3 Not Blocked/Blocked - Blocked raises an output which can be mapped to a Binary
output to Block an External Protection’s third Trip Output.
79 P/F Deadtime 3 Sets the third Reclose Delay (Deadtime) in the External sequence.
79 P/F Prot’n Trip4 Not Blocked/Blocked - Blocked raises an output which can be mapped to a Binary
output to Block an External Protection’s fourth Trip Output.
79 P/F Deadtime 4 Sets the fourth Reclose Delay (Deadtime) in the External sequence.
79 P/F Prot’n Trip5 Not Blocked/Blocked - Blocked raises an output which can be mapped to a Binary
output to Block an External Protection’s fifth Trip Output.