Switching Test Of The Configured Operating Equipment; Triggering Oscillographic Recording For Test - Siemens SIPROTEC 4 7VK61 Manual

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 No. 351 to 353, 379 and/or 380 (according to the possibilities of the auxiliary contacts); additionally,
the corresponding No. 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 analyzed. See also Section
test. Furthermore, the ready state of the circuit breaker for the CB test must be indicated to the binary input
with No. 371.

Switching Test of the Configured Operating Equipment

3.3.14
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.
The feedback information of the CB position injected via binary inputs should be read out and compared with
the actual breaker position.
For devices with graphic display this is easy to do with the control display.
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 verify the reliability of the protection relay even during inrush processes, closing tests can be
carried out to conclude the commissioning process. Oscillograhpic records provide the maximum information
about the behavior of the protection relay.
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 DIGSI software, the
serial interface, or a binary input. For the latter, the information
binary input. In this case, a fault record is triggered e.g. via binary input when the protected object is ener-
gized.
Such a test fault record triggered externally (i.e. not caused by pickup of a protection function) is processed
like a normal oscillographic record, i.e. a fault log with number is generated which univocally identifies an
oscillographic record. However, these recordings are not displayed in the trip log as they are not fault events.
Start Test Measurement Recording
To trigger test measurement recording with DIGSI, click on Test in the left part of the window. Double click in
the list view the Test Wave Form entry (see
SIPROTEC 4, 7VK61, Manual
C53000-G1176-C159-5, Edition 05.2018
>Trig.Wave.Cap. must be allocated to a
Figure 3-27).
Mounting and Commissioning
3.3 Commissioning
2.8.2 Circuit breaker trip
221