Siemens SIPROTEC 7UT613 series Manual page 296

2 Functions
"No Trip no Flag"
Statistical Counters
296
The recording of indications masked to local LEDs, and the maintenance of spontane-
ous indications, can be made dependent on whether the device has issued a trip com-
mand. Fault event information is then not output when one or more protection func-
tions have picked up due to a fault but no tripping of the 7UT613/63x resulted because
the fault was removed by another device (e.g. on a different feeder). The information
is thus limited to faults on the protected line (so-called "no trip – no flag" feature).
Figure 2-122 Logic diagram of the no–trip–no–flag feature (trip-dependent alarms)
The number of trips initiated by the device 7UT613/63x are counted.
Furthermore, the current interrupted for each pole and each measuring location is ac-
quired, provided as an information and accumulated in a memory. The criterion for the
acquisition and accumulation of the current levels is that a trip command has been
output by any protection function.
The counter and memory levels are secured against loss of auxiliary voltage. They
can be set to zero or to any other initial value. For further information please refer to
the SIPROTEC 4 System Description.
7UT613/63x Manual
C53000-G1176-C160-2