8.3.3.11 Setting of timers for distance protection zones
SEMOD55087-147 v6
The required time delays for different distance protection zones are independent of
each other . Distance protection zone 1 can also have a time delay, if so required
for selectivity reasons. Time delays for all zones can be set in a range of 0 to 60
seconds. The tripping function of each particular zone can be inhibited by setting
the corresponding Operation parameter to Off. Different time delays are possible
for the phase-to-earthtPE and for the phase-to-phase tPP measuring loops in each
distance protection zone separately, to further increase the total flexibility of a
distance protection.
8.4 Full-scheme distance measuring, Mho
characteristic ZMHPDIS
SEMOD154227-1 v4
8.4.1 Identification
SEMOD154447-2 v2
Function description IEC 61850
identification
IEC 60617 identification ANSI/IEEE
C37.2 device
number
Full-scheme distance protection, mho
characteristic
ZMHPDIS
S00346 V1 EN-US
21
8.4.2 Application
SEMOD154444-1 v1
8.4.2.1 Functionality
SEMOD154453-4 v6
Transmission and sub-transmission networks are being extended and often become
more and more complex, consisting of a high number of multi-circuit and/or multi
terminal lines of very different lengths. These changes in the network will normally
impose more stringent demands on the fault clearing equipment in order to
maintain an unchanged or increased security level of the power system.
Full-scheme distance measuring, mho characteristic function (ZMHPDIS) in the
IED is designed to meet basic requirements for application on transmission and
sub-transmission lines (solid earthed systems) although it also can be used on
distribution levels.
1MRK 506 369-UEN B Section 8
Impedance protection
Line distance protection REL670 2.2 IEC 235
Application manual
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