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Mounting and Commissioning
3.3 Commissioning
It must be noted that the binary inputs used for the circuit breaker auxiliary contacts must be assigned sepa-
rately for the CB-test. This means it is not sufficient that the auxiliary contacts are allocated to the binary inputs
FNo. 351 to 353, 379 and 380 (according to the possibilities of the auxiliary contacts); additionally, the corre-
sponding FNo. 366 to 368 or 410 and/or 411 must be allocated (according to the possibilities of the auxiliary
contacts In the CB-test only the latter ones are analysed. See also Section „Detection of the Circuit-Breaker
Position" in Chapter 2. Furthermore, the ready state of the circuit breaker for the CB-test must be indicated to
the binary input with FNo. 371.
3.3.14
Switching Test of the Configured Operating Equipment
Switching by Local Command
If the configured operating devices were not switched sufficiently in the hardware test already described, all
configured switching devices must be switched on and off from the device via the integrated control element.
For this the feedback information of the CB position injected via binary inputs should be read out at the device
and compared with the actual breaker position.
The switching procedure is described in the SIPROTEC 4 System Description. The switching authority must
be set in correspondence with the source of commands used. With the switching mode, you can choose
between locked and unlocked switching. In this case, you must be aware that unlocked switching is a safety
risk.
Switching from a Remote Control Centre
If the device is connected to a remote substation via a system (SCADA) interface, the corresponding switching
tests may also be checked from the substation. Please also take into consideration that the switching authority
is set in correspondence with the source of commands used.
3.3.15
Triggering Oscillographic Recording for Test
In order to be able to test the stability of the protection during switchon procedures also, switchon trials can also
be carried out at the end. Oscillographic records obtain the maximum information about the behaviour of the
protection.
Prerequisite
Along with the capability of storing fault recordings via pickup of the protection function, the 7VK61 also has the
capability of capturing the same data when commands are given to the device via the service program DIGSI,
the serial interface, or a binary input. For the latter, event „>Trig.Wave.Cap." must be allocated to a binary
input. Triggering of the recording then occurs, for example, via the binary input when the protection object is
energized.
An oscillographic recording that is externally triggered (that is, without a protective element pickup or device
trip) is processed by the device as a normal oscillographic recording, and has a number for establishing a se-
quence. However, these recordings are not displayed in the fault indication buffer, as they are not fault events.
226
SIPROTEC, 7VK61, Manual
C53000-G1176-C159-3, Release date 05.2009
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