might occur instead of maximum exporting power and the relevant Vmin voltage for this
condition.
8.10.4.2 Minimum operate currents
FRPSPDIS (21) has two current setting parameters, which blocks the respective phase-to-
ground loop and phase-to-phase loop if the RMS value of the phase current (ILn) and
phase difference current (ILmILn) is below the settable threshold.
The threshold to activate the phase selector for phase-to-ground (IMinPUPG) is set to the
default value or a level to securely detect a single line-to-ground fault at the furthest reach
of the phase selection. It is recommended to set IMinPUPP to double value of
IMinPUPG.
The threshold for opening the measuring loop for phase-to-ground fault (3I0Enable_PG)
is set securely detect single line-to-ground fault at remote end on the protected line. It is
recommended to set INBlockPP to double value of 3I0Enable_PG.
8.11 Phase selection, quad, fixed angle, load encroachment
FDPSPDIS (21)
8.11.1 Identification
8.11.1.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Phase selection, quad, fixed angle, load
encroachment
FDPSPDIS
SYMBOL-DD V1 EN
21
8.11.2 Application
The operation of transmission networks today is in many cases close to the stability limit.
The ability to accurately and reliably classify the different types of fault, so that single pole
tripping and autoreclosing can be used plays an important role in this matter. Phase
selection with load encroachment function FDPSPDIS (21) is designed to accurately
select the proper fault loop in the distance measuring function depending on the fault type.
1MRK 506 369-UUS - Section 8
Impedance protection
Line distance protection REL670 2.2 ANSI 347
Application manual
To Next Page
Loading...
