Secondary Check - Siemens SIPROTEC 7UT613 series Manual

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3.3.6 Secondary Tests
7UT613/63x Manual
C53000-G1176-C160-2
Table 3-25 Indications on matching factors
No.
30060 General: Magnitude matching factor at the indicated measuring location 2.1.4
to
30064
30065 General: Magnitude matching factor of 3-phase voltage input
5733 Differential protection: Magnitude matching factor of the indicated mea-
to suring location (3-phase protected objects)
5737
5721 Differential protection: Magnitude matching factor of the indicated mea-
to suring location (1-phase busbar protection)
5732
5738 Differential protection: Magnitude matching factor of the indicated aux-
to iliary 1-phase measuring location
5741
Earth fault differential protection 1: Magnitude matching factor of the
starpoint current
Earth fault differential protection 2: Magnitude matching factor at the in-
dicated measuring location
Earth fault differential protection 2: Magnitude matching factor of the
starpoint current
Checking the individual protection functions of the characteristic curves or pick-up
values is not required since these are part of the firmware programs which are moni-
tored continuously. Analogue inputs are checked at the primary commissioning at the
protective object (Section 3.3 under „Symmetrical Current Tests on the Protective Ob-
ject"). Verification of connections, i.e. coupling with the plant, also takes place there.
Measured quantities deviation between the protective functions and phases can be
excluded.
Secondary checks can never replace the primary checks described below, as connec-
tion errors cannot be included. They can however be used as theoretical test of the
setting values. Should you want to perform a secondary test, please observe the fol-
lowing hints.
When performing tests with secondary test equipment, attention must be paid that no
other measuring values are applied and that the trip command to the circuit breakers
are interrupted.
The tests should be done with the current setting values of the device. If these are not
(yet) available, the test should be done with the preset values.
Description
3.3 Commissioning
see
section
2.1.4
2.1.4
2.1.4
2.1.4
2.1.4
2.1.4
2.1.4
389