Siemens SIPROTEC 7UT613 series Manual page 319

7UT613/63x Manual
C53000-G1176-C160-2
Furthermore, it can be determined how the currents shall be processed. The respec-
tive phase currents can be evaluated jointly or individually or by means of the symmet-
rical component calculated from the three phase currents (the latter does not apply to
single-phase CT):
• IL1..IL3: The phase currents are individually evaluated (e.g. with regard to overcur-
rent) 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.
• 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.
• CT1 or CT2 or ... or CT 12: The current of the respective current measuring input is
evaluated. In case of 7UT613 and 7UT633, only the 9 possible currents are avail-
able for selection.
If you have selected the 1-phase currents at the additional measuring inputs from the
pre-selection, (current IZ1..I1Z2), it is determined which of the currents must be used
for the evaluation of the flexible functions.
• Auxiliary transformer AUX1 or Auxiliary transformer AUX2 or ... or Auxiliary
transformer AUX4: The current of the respective additional measuring input is
evaluated. Only 3 additional measuring inputs are possible for 7UT613 and
7UT633. Only 1 single-phase additional measuring input is possible for 7UT635, 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.
• 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.
• UL1E or UL2E or UL3E: Only the selected voltage is evaluated. The flexible func-
tion thus evaluates only the selected phase-phase voltage here. Should you wish
to monitor phase-phase voltages, a separate flexible function must be parameter-
ised per phase-ground voltage to be evaluated. It can be set and delayed individu-
ally.
• 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.
• 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 pa-
rameterised 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 re-
verse, power factor), a corresponding value is calculated from the phase voltages
2.22 Additional Functions
319