Setting Notes - Siemens SIPROTEC 7UT613 series Manual

2.22.7.2 Setting Notes

General
Configuration Set-
tings
7UT613/63x Manual
C53000-G1176-C160-2
Blocking an overcurrent time protection time function can thus be done after detection
of inrush currents. The detection of inrushes is functional part of the time overcurrent
protection, as per Section 2.4.2.
A dynamic cold load pickup can be achieved by twice creating a flexible protective
function (time overcurrent protection) with different pickup values. Depending on the
dynamic cold load pickup according to section 2.6 one of the functions is released and
the other one blocked.
You can combine overcurrent, undercurrent, direction and task frequency of the
network decoupling or for load shedding. Criteria for under and overexcitation or reac-
tive power control can be derived from reactive power measurement.
Flexible Functions can only be created by a PC with DIGSI. Up to 20 flexible functions
for protection or monitoring are possible. Each function can be individually configured
by means of the options described below.
Please note that the available functions depend on the ordered device version as well
as the configured assignments in accordance with 2.4.1. Voltage-controlled functions
are only possible, for example, if measured voltages are connected to the device
which have been assigned in accordance with section 2.4.1.
The required flexible functions must have been set during configuration of the func-
tional scope (section 2.1.3).
During setting, please follow the sequence as described below. In DIGSI the tabs (set-
ting sheets) should be edited from left to right.
The configuration settings can be executed for each desired flexible function. These
settings are fixed and are not influenced by the setting group change-over. In contrast
to this, the group of the function settings as described in the following next subsection
can be executed for each setting group. Therefore, together with other protection and
monitoring function, a setting group change-over can be carried out during operation.
Firstly, a rough selection must be made with regard to the measured value(s) to be
evaluated by the flexible functions. Please note that where the polarity of measured
values is important (power), the actual connections as well as the respective settings
must also be taken into consideration. This applies both to the current polarity for the
involved current measuring locations in accordance with section 2.1.4 and the respec-
tive CT data as well as the definition of signs in accordance with section 2.1.6 (address
1107 P,Q sign).
Only those of the following options appear, which compute with the existing measured
values and the set protected object. Select the following:
• Current measuring location / side, if three-phase currents of a measuring loca-
tion or side must be evaluated (also applicable to single-phase transformer). This
applies to the evaluation of individual phase currents as well as three-phase cur-
rents of calculated values, for example symmetrical components (positive, negative
and zero sequence network).
• Current I1..I12, if single-phase currents for single-phase busbars must be evaluat-
ed. Only 9 currents are possible for 7UT613 and 7UT633.
2.22 Additional Functions
317