The resistive boundary RLdRev for load encroachment characteristic in reverse
direction can be calculated in the same way as RLdFwd, but use maximum importing
power that might occur instead of maximum exporting power and the relevant Vmin
voltage for this condition.
8.10.4.2
Minimum operate currents
GUID-5B4DF48C-48ED-433D-92D8-B146E8A8A7E0 v1
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)
IP12400-1 v4
8.11.1 Identification
8.11.1.1 Identification
M14850-1 v6
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-US
21
8.11.2 Application
M13138-3 v3
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
1MRK 504 163-UUS A Section 8
Impedance protection
Transformer protection RET670 2.2 ANSI 359
Application manual
To Next Page
Loading...
