[ausloeselogik-mit-1be-121102-st, 1, en_GB]
Figure 2-124 Storage and termination of the trip command (simplified)
Reclosure Interlocking
After tripping the circuit breaker by a protection function the manual reclosure must often be blocked until the
cause for the protection operation is found.
Using the user-configurable logic functions (CFC) an automatic reclosure interlocking function can be created.
The default setting of 7UT6x offers a pre-defined CFC logic which stores the trip command of the device until
the command is acknowledged manually. The CFC block is illustrated in the Appendix E.6 Pre-defined CFC
Charts. The internal output
G-TRP Quit
must be additionally assigned to the tripping output relays which are
to be sealed.
Acknowledgement is done via binary input
>QuitG-TRP
. With default configuration, press function key F4 at
the device front to acknowledge the stored trip command.
If the reclosure interlocking function is not required, delete the allocation between the internal single-point
indication
G-TRP Quit
and the source “CFC” in the configuration matrix.
NOTE
The internal single-point indication
G-TRP Quit
is not affected by the setting option Block relay of
the protection functions. If this indication is allocated to a trip relay, this relay will be actuated in case of a
trip of the protection functions, even if Block relay is set for that function.
“No Trip no Flag”
The recording of annunciations masked to local LEDs, and the maintenance of spontaneous indications, can
be made dependent on whether the device has issued a trip command. Fault event information is then not
output when one or more protection functions have picked up due to a fault but no tripping of the 7UT6x
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).
[logikdia-kommandoabhaengigen-meld-121102-st, 1, en_GB]
Figure 2-125 Logic diagram of the no–trip–no–flag feature (trip-dependent annunciations)
Statistical Counters
The number of trips initiated by the device 7UT6x are counted.
Furthermore, the current interrupted for each pole and each measuring location is acquired, 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.
Functions
2.20 Function Control
272 SIPROTEC 4, 7UT6x, Manual
C53000-G1176-C230-5, Edition 09.2016
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