Minimum Operate Currents; High Speed Distance Protection Zmfpdis (21); Identification; Application - ABB RELION 670 SERIES Applications Manual

1MRK 506 369-UUS -
8.11.3.3
8.12
8.12.1
8.12.2
Line distance protection REL670 2.2 ANSI
Application manual
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.

Minimum operate currents

FDPSPDIS (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
securely detect a single phase-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 3I0BLK_PP to double value of 3I0Enable_PG.

High speed distance protection ZMFPDIS (21)

Identification

Function description
High speed distance protection zone

Application

The fast distance protection function ZMFPDIS in the IED is designed to provide sub-
cycle, down to half-cycle operating time for basic faults. At the same time, it is specifically
designed for extra care during difficult conditions in high-voltage transmission networks,
like faults on long heavily loaded lines and faults generating heavily distorted signals.
These faults are handled with utmost security and dependability, although sometimes with
a reduced operating speed.
Impedance protection
IEC 61850 IEC 60617
identification identification
ZMFPDIS
S00346 V1 EN
Section 8
ANSI/IEEE C37.2
device number
21
355