Siemens 7SR224 - 4.1.4 P;F SHOTS Sub-Menu; 4.1.5 E;F SHOTS Sub-Menu; 4.1.6 SEF SHOTS Sub-Menu

(1) Description of Operation 7SR224
©2009 Siemens Protection Devices Limited Page 45 of 66
4.1.4 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.
4.1.5 E/F SHOTS sub-menu
This menu allows the Earth Fault trip/reclose sequence to be parameterized:-
As above but E/F settings.
4.1.6 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