ABB REL670 2.2 IEC - Minimum Operate Currents

8.11.3.3 Minimum operate currents
M13142-334 v5
FDPSPDIShas two current setting parameters which blocks the respective phase-
to-earth 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-earth (IMinOpPE) is set to
securely detect a single phase-to-earth fault at the furthest reach of the phase
selection. It is recommended to set IMinOpPP to double value of IMinOpPE.
The threshold for opening the measuring loop for phase-to-earth fault
(INReleasePE) is set securely detect single line-to-earth fault at remote end on the
protected line. It is recommended to set INBlockPP to double value of
INReleasePE.
8.12 High speed distance protection ZMFPDIS
GUID-CC4F7338-2281-411D-B55A-67BF03F31681 v4
8.12.1 Identification
GUID-8ACD3565-C607-4399-89D2-A05657840E6D v3
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
High speed distance protection zone ZMFPDIS
S00346 V1 EN-US
21
8.12.2 Application
IP14961-1 v2
GUID-2F952D87-6BEB-4425-B823-DF8511B9E742 v3
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.
8.12.2.1 System earthing
GUID-EB5B5594-AA81-4FC5-BBC0-7627A8609A23 v1
The type of system earthing plays an important role when designing the protection
system. Some hints with respect to distance protection are highlighted below.
Solidly earthed networks
GUID-6B0F02F4-18ED-415E-8D48-0A1648F7CE00 v2
In solidly earthed systems, the transformer neutrals are connected directly to earth
without any impedance between the transformer neutral and earth.
Section 8 1MRK 506 369-UEN B
Impedance protection
332 Line distance protection REL670 2.2 IEC
Application manual