3.3 Commissioning
411
7SA522 Manual
C53000-G1176-C155-3
– And if the device configuration is also consistent, i.e. the prerequisites for setting
the function scope (Section 2.1.1), Power System Data 1 (2.1.3.1), Power
System Data 2 (2.1.5.1) topology and protection data interface parameters (Sec-
tion 2.4.2) have been considered, the fault message, i.e. FNo. 3229 ´3,'DWD
IDXOWµ or FNo. 3231 ´3,'DWDIDXOWµ for the interface just checked will
disappear. The communication and consistency test has now been completed.
– If the fault message of the interface being checked does not disappear, however,
the fault must be found and eliminated. Table 3-15 lists messages that indicate
such faults.
Table 3-15 Messages on Inconsistencies
Checking Further
Links
If more than two devices have been linked, that is if the object to be protected has
more than two ends, or, if two devices have been linked via both protection data inter-
faces to create redundancy, repeat all checks for every possible link as described
above including the consistency check.
If all devices involved in the topology communicate properly and all parameters are
consistent, the message FNo.3464 ´7RSROFRPSOHWHµ appears.
If there is a ring topology (only in connection with a 7SA522), the message FNo. 3457
´5LQJWRSRORJ\µ must also appear after closing the ring.
However, if you are employing a ring topology, which only issues the indication
´&KDLQWRSRORJ\µ instead of ´5LQJWRSRORJ\µ, the protection data communica-
tion is functionable, but the ring has not yet been closed. Check the missing links as
described above including the consistency test until all links to the ring have been
made.
Finally, there should be no more fault messages of the protection data interfaces.
3.3.6 Tests for Circuit Breaker Failure Protection
General If the device is equipped with the breaker failure protection and this function is used,
the integration of this protection function into the system must be tested under practi-
cal conditions.
Because of the manifold application facilities and various configuration possibilities of
the power plant it is not possible to give detailed description of the necessary test
steps. It is important to observe local conditions and protection and system drawings.
Before starting the circuit breaker tests it is recommended to insulate at both ends the
feeder which is to be tested, i.e. line disconnectors and busbar disconnectors should
be open so that the breaker can be operated without risk.
FNo. LCD Text Meaning/Measures
3233 “DT inconsistent” “Device table inconsistent”: The indexing of the devices
is inconsistent (missing numbers or one number used
twice, see Section 2.4.2)
3234 “DT unequal” “Device table unequal”: the ID-numbers of the devices
are unequal (see Section 2.4.2 )
3235 “Par. different” “Parameterization different”: Different functional parame-
ters were set for the devices. They have to be equal at
both ends:
To Next Page
Loading...
Need help?
General
