P54x/EN ST/La4 Settings
(ST) 4-14
MiCOM P543, P544, P545, P546
ST
Setting range
Menu text Default setting
Min. Max.
Step size
Z3 Ph Status Enabled
Enabled or Disabled or Enable n CH d o
Fail
As per Z1, but applicable to Zone 3.
Z3 Phase Reach 250% 10% 1000% 10%
Setting entry as percentage of the line impedance that sets Zone 3 forward reach in ohms.
Z3 Ph Offset Enabled
Enabled or Disabled or Enabled on CH
Fail
To enable (activate) or able (turn off) or (only in the case tha ifferential
aults.
ase characteristic is offset (partly reverse directional), thus not
If Z3 Gnd Offset’ is disabled, Z3 Mho characteristic becomes
dis enable t d
protection communication channel is lost) Zone 3 offset reach for phase f
By default, Z3 Mho ph
memory/cross polarized. ‘
memory/cross polarized like all other zones.
Z3 Rev Reach 10% 10% 1000% 1%
Setting entry as percentage of the line impedance that sets Zone 3 reverse reach in ohms.
ZP Ph Status Enabled
Enabled or Disabled or Enabled on CH
Fail
As per Z1, but applicable to Zone P.
ZP Ph Dir. Forward Forward/ Reverse
To directionalize Zone P forward or reverse.
ZP Phase Reach 200% 10% 1000% 10%
Setting entry as percentage of the line impedance that sets Zone P forward or reverse
reach in ohms.
Z4 Ph Status Enabled
Enabled or Disabled or Enabled on CH
Fail
As per Z1, but applicable to Zone 4.
Z4 Phase Reach 150% 10% 1000% 10%
Setting entry as percentage of the line impedance that sets reverse Zone 4 reach in ohms.
GROUND DISTANCE
Ground Chars. Mho Disabled or Mho or Quad 21G char.
Setting to disable (turn off) ground distance protection or to set Mho or Quad operating
characteristic: ANSI 21G.
The chosen setting is applicable to all ground distance zones.
Quad Resistance Proportional Common or Proportional
Setting to define the mode of resistive reach coverage. If ‘Common’ mode is selected, all
verage. If ‘Proportional’ mode is
to the % reach set for the
ground distance zones will have the equal resistive co
selected, the zones will have resistive coverage according
zone, multiplied by the ‘Fault Resistance’ R
G
setting.
This setting is visible only when ‘Simple’ setting mode and quad characteristic are set.
Fault Resistance 10/In Ω 0.05/In Ω 500/In Ω 0.01/In Ω
Setting used to specify the fault arc resistance that can be detected for faults phase -
ground. The set value determines the right hand side of the quadrilaterals.
This setting is visible only when ‘Simple’ setting mode and quad characteristic are set.
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