Siemens siprotec 7SA6, Руководство пользователя

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Installation and Commissioning
8-56
7SA6 Manual
C53000-G1176-C156-2
checked will disappear. The communication and consistency test has now been
completed.
G If the fault message of the interface being checked does not disappear, however,
the fault must be found and eliminated. Table 8-11 lists messages that indicate such
faults.
Table 8-27 Messages announcing inconsistency
Checking further
Links If all devices involved in the topology communicate properly and all parameters are
consistent, the message FNo. 3464 "
Topol complete
" appears.
If there is a ring topology (only when connected with a 7SA522), the message FNo.
3457 "
Ringtopology
" must also appear after closing the ring.
However, if you've got a ring topology which only issues the message "
Chaintopol-
ogy
" instead of "
Ringtopology
", the protection data communication is functionable,
but the ring has not yet been closed. Check the missing link as described above in-
cluding the consistency test until all links to the ring have been made.
Now, there may be no more fault messages of the protection data interfaces.
8.3.6 Tests for the Circuit Breaker Failure Protection
If the device provides a breaker failure protection and if this is used, the integration of
this protection function in the system must be tested under practical conditions.
Due to the variety of application options and the available system configurations, it is
not possible to make a detailed description of the necessary tests. It is important to
consider the local conditions and the protection and plant drawings.
It is advised to isolate the circuit breaker of the tested feeder at both sides, i.e. to keep
the busbar isolator and the line isolator open, in order to ensure operation of the break-
er without risk.
FNo Setting Meaning / Measures
3233 DT inconsistent "Device table has inconsistent numbers": the indexing of the
devices is inconsistent (missing numbers or one number
used twice, see Section 6.4.2
3234 DT unequal "Device tables are unequal": the ID-numbers of the devices
are unequal (see Section 6.4.2)
3235 Par. different Parametrization different: different functional parameters were set
for the devices. They have to be equal at all ends.
Caution!
Also for tests on the local circuit breaker of the feeder a trip command to the surround-
ing circuit breakers can be issued for the busbar. Therefore the tripping of the sur-
rounding circuit breakers (busbar) must be deactivated, e. g. by switching off the cor-
responding control voltages.Nevertheless ensure that trip remains possible in case of
a real primary fault if parts of the power plant are in service.