Sel 411L - Table 3.95 Mho Phase Distance Element Settings; Table 3.96 Mho Phase Distance Elements Relay Word Bits

P.3.187
Date Code 20151029 Protection Manual SEL-411L Relay
Protection Functions
Mho Phase Distance Elements
The -1 relay has three independent zones of high-speed mho phase distance
protection. The high-speed mho phase distance protection operates for phase-
to-phase, phase-to-phase-to-ground, and three-phase faults. The first three
zones of mho phase distance protection (Zone 1, Zone 2, and Zone 3) are for
high-speed operation; typical detection time is less than one cycle.
Table 3.95 shows the mho phase distance element settings.
Table 3.96 shows the mho phase distance elements Relay Word bits.
Table 3.95 Mho Phase Distance Element Settings
Name Description Range
Default
(5 A)
E21MP Mho phase distance zones N, 1–5 3
Z1MP Zone 1 reach () OFF (0.25–320)/I
NOM
6.24
Z2MP Zone 2 reach () OFF, (0.25–320)/I
NOM
9.36
Z3MP Zone 3 reach () OFF, (0.25–320)/I
NOM
1.87
Z4MP Zone 4 reach () OFF, (0.25–320)/I
NOM
OFF
Z5MP Zone 5 reach () OFF, (0.25–320)/I
NOM
OFF
Table 3.96 Mho Phase Distance Elements Relay Word Bits
Relay Word Bit Description
MAB1 Zone 1 mho A-B phase element
MBC1 Zone 1 mho B-C phase element
MCA1 Zone 1 mho C-A phase element
Z1P Zone 1 phase distance element
M1P Zone 1 mho phase element
MAB2 Zone 2 mho A-B phase element
MBC2 Zone 2 mho B-C phase element
MCA2 Zone 2 mho C-A phase element
Z2P Zone 2 phase distance element
M2P Zone 2 mho phase element
MAB3 Zone 3 mho A-B phase element
MBC3 Zone 3 mho B-C phase element
MCA3 Zone 3 mho C-A phase element
Z3P Zone 3 phase distance element
M3P Zone 3 mho phase element
MAB4 Zone 4 mho A-B phase element
MBC4 Zone 4 mho B-C phase element
MCA4 Zone 4 mho C-A phase element
Z4P Zone 4 phase distance element
M4P Zone 4 mho phase element
MAB5 Zone 5 mho A-B phase element
MBC5 Zone 5 mho B-C phase element
MCA5 Zone 5 mho C-A phase element
Z5P Zone 5 phase distance element
M5P Zone 5 mho phase element