ABB REG670 - Monitored Data

Name Values (Range) Unit Step Default Description
tPRCrv4 0.005 - 3.000 - 0.001 0.500 Param PR for customized inverse reset
time curve for step 4
tTRCrv4 0.005 - 100.000 - 0.001 13.500 Param TR for customized inverse reset
time curve for step 4
tCRCrv4 0.1 - 10.0 - 0.1 1.0 Param CR for customized inverse reset
time curve for step 4
Table 183: NS4PTOC Non group settings (basic)
Name Values (Range) Unit Step Default Description
GlobalBaseSel 1 - 12 - 1 1 Selection of one of the Global Base Value
groups
8.5.6 Monitored data
Table 184: NS4PTOC Monitored data
Name Type Values (Range) Unit Description
IOp REAL - A Operating current level
UPol REAL - kV Polarizing voltage level
UPOLIANG REAL - deg Polarizing angle between
voltage and current
8.5.7 Operation principle
Four step negative sequence overcurrent protection NS4PTOC function has the
following three “Analog Inputs” on its function block in the configuration tool:
1. I3P, input used for “Operating Quantity”.
2. U3P, input used for “Polarizing Quantity”.
3. I3PDIR, input used for "Directional finding"
These inputs are connected from the corresponding pre-processing function blocks in
the Configuration Tool within PCM600.
8.5.7.1 Operating quantity within the function
Four step negative sequence overcurrent protection NS4PTOC function always uses
negative sequence current (I2) for its operating quantity. The negative sequence
current is calculated from three-phase current input within the IED. The pre-
processing block calculates I2 from the first three inputs into the pre-processing block
by using the following formula:
1MRK502052-UEN B Section 8
Current protection
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Technical manual