Siemens SIPROTEC 4 7UT6 Series Manual page 292

Functions
2.22 Auxiliary Functions
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Side 1 to Side 5: Select the respective side where three-phase evaluation of the currents is desired. Only
those sides are possible which have been defined in accordance with the configuration in SectionGen-
eral. For 7UT612 only 2, and for 7UT613 or 7UT633 a maximum of 3 sides is possible.
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Measuring location 1 bis Measuring location 5: If you do not wish to process the currents of a side of
the main protected object, but those of a three-phase measuring location (assigned or not assigned to
the main protected object), please specify them here. For 7UT612 only 2, and for 7UT613 or 7UT633 a
maximum of 3 measuring locations is possible.
Furthermore, it can be determined how the currents shall be processed. The respective phase currents can be
evaluated jointly or individually or by means of the symmetrical component calculated from the three phase
currents (the latter does not apply to single-phase CT):
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IL1..IL3: The phase currents are individually evaluated (e.g. with regard to overcurrent) and processed:
Pickup, delays, commands. The setting values (pickup value, delay times) are however combined.
•
IL1 or IL2 or IL3: Only the selected current will be evaluated (IL2 not applicable to single-phase CT). The
flexible function thus evaluates only the selected phase current here. Each current to be evaluated
requires a separate flexible function, however, each can be set and delayed individually.
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3I0 or I1 or I2: The selected symmetrical component is calculated and evaluated from the three phase
currents (not applicable to single-phase CT).
If you have selected the 1-phase currents for busbar protection from the pre-selection above, (I1..I12), it is
determined which of the currents must be used for the evaluation of the flexible functions.
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Current Transformer 1 or Current Transformer 2 or ... or Current Transformer 12: The current of the
corresponding current measuring input is evaluated. For 7UT612 you can select only from 7, and for
7UT613 and 7UT633 only from 9 possible currents.
If you have selected the 1-phase currents at the additional measuring inputs from the pre-selection, (current
IX1..I1X2), it is determined which of the currents must be used for the evaluation of the flexible functions.
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Auxiliary transformer X1 or Auxiliary transformer X2 or ... or Auxiliary transformer X4: The current of
the corresponding auxiliary measuring input is evaluated. For 7UT612 only 2, and for 7UT613 and
7UT633 only 3 auxiliary single-phase measuring inputs are possible. For 7UT635, only 1 single-phase
auxiliary measuring input is possible if 5 three-phase inputs have been configured.
If you have chosen voltages from the pre-selection (voltage), this determines exactly which of the measured
or calculated voltages must be used for the evaluation of the flexible functions. Voltage functions are only
possible if the device has voltage inputs.
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UL1E..UL3E: The phase-ground voltages are individually evaluated (e.g. with regard to overvoltage) and
processed: The setting values (pickup value, delay times) are however combined.
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UL1E or UL2E or UL3E: Only the selected voltage is evaluated. The flexible function thus evaluates only
the selected phase-phase voltage here. Should you wish to monitor phase-phase voltages, a separate
flexible function must be parameterised per phase-ground voltage to be evaluated. It can be set and
delayed individually.
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UL12..UL31: The phase-phase voltages are individually evaluated (e.g. with regard to overvoltage) and
processed: The setting values (pickup value, delay times) are however combined.
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UL12 or UL23 or UL31: Only the selected phase-phase voltage is evaluated. The flexible function thus
evaluates only the selected phase-phase voltage here. Should you wish to monitor phase-phase voltages,
a separate flexible function must be parameterised per phase-phase voltage to be evaluated. Each can be
set and delayed individually.
•
U0 or U1 or U2: The selected symmetrical component is calculated and evaluated from the three phase
voltages (not applicable to single-phase transformer).
If you have chosen one of the power functions from the pre-selection above (active power forward, active
power reverse, reactive power forward, reactive power reverse, power factor), a corresponding value is
calculated from the phase voltages and the voltages assigned to the currents. Power functions are only
possible if the device has voltage inputs.
Set the measuring type for the power functions. Please note that this option has a respectively higher oper-
ating time due to the averaging over 16 periods. Short trip times are possible with this option as the power is
determined over one period only. If also small active or reactive power must be calculated from bigger appa-
292 SIPROTEC 4, 7UT6x, Manual
C53000-G1176-C230-5, Edition 09.2016