Siemens SIPROTEC 7UT613 series User Manual

3.3 Commissioning
397
7UT613/63x Manual
C53000-G1176-C160-2
Termination of the
Checks
All temporary measures taken for testing must be undone. This is to ensure that all
switching devices of the system are in the correct state, that interrupted trigger con-
nections are restored and that control voltages are activated. Setting values that may
have been changed for the tests, must be corrected and protective functions that were
switched, must be set to the intended switching state (ON or OFF).
3.3.8 Symmetrical, Primary Current Tests on the Protected Object
If secondary test equipment is connected to the device, it must be removed; any ex-
isting test switches should be in normal operating position.
Note
It should be expected that tripping occurs if connections were wrong.
The measured quantities of the following tests can be read out from the PC using a
web browser via the WEB monitor. This provides comfortable read-out possibilities for
all measured values with visualisation using phasor diagrams.
If you choose to work with the Web-monitor, please note the Help files referring to the
Web-monitor. The IP address required for the browser depends on the port used for
connecting the PC:
• for connection at the front: operator interface IP address 141.141.255.160
• Connection to the rear service interface: IP address 141.143.255.160
The transmission speed is 115 kBaud.
The following descriptions refer to read-out of measured values with DIGSI. All mea-
sured values can be read out from the device.
Preparation of Sym-
metrical Current
Tests
At first commissioning, current checks must be performed before the protected object
is energised for the first time. This ensures that the differential protection is operative
as a short-circuit protection during the first excitation of the protected object with volt-
age. If current checks are only possible with the protected object under voltage (e.g.
power transformers in networks when no low-voltage test equipment is available), it is
imperative that a backup protection, e.g. time overcurrent protection, be commis-
sioned before, which operates at least at the feeding side. The trip circuits of other pro-
tection devices (e.g. Buchholz protection) must remain operative as well.
If more than 2 measuring locations are present for the main protected object, the test
must be repeated such that each possible current path through the protected object
has been part of a test. It is not necessary to test every possible current path. Thus, it
is advised to start with measuring location M1 of the main protected object and to
check this measuring location against all others. If a side has more than one measur-
ing location, each location must be included in a test. The other measuring locations
remain current-free.
If further three-phase protected objects are present, these are tested individually ac-
cording to their topology.
The test setup varies dependent of the application.

Siemens SIPROTEC 7UT613 series Specifications

General

Brand	Siemens
Model	SIPROTEC 7UT613 series
Category	Protection Device
Language	English