2.1 General
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7UT613/63x Manual
C53000-G1176-C160-2
As different connections are possible, you must now specify in the device how the con-
nected 1-phase voltage should be interpreted. This is done at address 263 VT U4
TYPE. Set Udelta transf. if the voltage assigned acc. to address 262 is a dis-
placement voltage. It can also be any phase-to-earth voltage (e.g. UL1E
transform.), or a phase-to-phase voltage (e.g. UL12 transform.). If U4 is con-
nected to a voltage which is assigned to no side or measuring location, set Ux
transformer.
2.1.4.2 General Power System Data (Power System Data 1)
General The device requires some plant and power system data in order to be able to adapt its
functions accordingly, dependent on the actual application. The data required include
for instance rated data of the substation and the measuring transformers, polarity and
connection of the measured quantities, if necessary features of the circuit breakers,
and others. There are also certain parameters common to all functions, i.e. not asso-
ciated with a specific protection, control or monitoring function. These data can only
be changed from a PC running DIGSI and are discussed in this section.
Rated Frequency The rated frequency of the power system is set under address 270 Rated
Frequency. The available rated frequencies are 50 Hz, 60 Hz and 16,7 Hz.
Phase Sequence Under address 271 PHASE SEQ. the presetting for clockwise rotation L1 L2 L3 can
be changed if a power plant has an anticlockwise rotation L1 L3 L2. The phase se-
quence has no influence on the vector group conversion of the differential protection
as long as the identical phase rotation is present on all sides of the protected object.
This setting is irrelevant for single-phase application and is not accessible.
Figure 2-10 Phase rotation
Temperature Unit The temperature of the hot-spot temperature calculation can be displayed in Celsius
or Fahrenheit. This applies in particular for the output of the hot-spot temperature if
you are using the overload protection with hot-spot calculation. Set the desired tem-
perature unit in address 276 TEMP. UNIT. Changing temperature units does not
mean that setting values which are linked to these temperature units will automatically
be converted. They have to be re-entered into their corresponding valid addresses.
Object Data with
Transformers
Transformer data are required if the device is used for differential protection for trans-
formers, i.e. if the following was set with the configuration of the protection functions
(functional scope) under address 105 PROT. OBJECT = 3 phase transf. or 1
phase transf. or Autotr. node. In cases other than that, these settings are not
available.
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