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 97: 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
7.5.6 Monitored data
PID-4151-MONITOREDDATA v4
Table 98: 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
7.5.7 Operation principle
GUID-8923EC0B-A5BA-431B-9699-EB67E2637560 v3
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.
7.5.7.1 Operating quantity within the function
GUID-8F0A5BDE-AC98-4188-9085-42A8DF00C476 v3
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:
1MRK 506 382-UEN A Section 7
Current protection
Line distance protection REL650 2.2 IEC 211
Technical manual
To Next Page
Need help?
General
