Settings P54x/EN ST/La4
MiCOM P543, P544, P545, P546
(ST) 4-13
ST
Setting range
Menu text
Min.
Default setting
Max.
Step size
Setting Mode Simple Simple or Advanced
Setting
Mode
Setting to select setting mode for Distance protection, depending on type of application
and user preferences.
‘Simple’ mode:
‘Simple’ setting mode is the default setting mode, suitable for the majority of applications.
Instead of entering distance zone impedance reaches in ohms, zone settings are simply
entered in terms of percentage of the protected line data specified in the ‘GROUP x LINE
PARAMETERS/Line Impedance’ setting. The setting assumes that the residual
compensation factor is equal for all zones. The relay auto calculates the required reaches
from the percentages. The calculated zone reaches are available for viewing but a user
can not alter/change the value as long as ‘Simple’ mode setting remains active.
Advanced setting mode:
‘Advanced’ setting mode allows individual distance ohmic reaches and residual
compensation factors to be entered for each zone. When ‘Advanced’ mode is selected, all
‘percentage’ settings that are associated to ‘Simple’ setting mode in the column GROUP x
DISTANCE SETUP will be hidden and the Distance zone settings need to be entered for
each zone in the ‘GROUP x DIST. ELEMENTS’ column.
PHASE DISTANCE
Phase chars. Mho Disabled or Mho or Quad 21P char.
Setting to disable (turn off) phase distance protection or to set Mho or Quad operating
characteristic: ANSI 21P.
The chosen setting is applicable to all phase distance zones.
Quad Resistance Proportional Common or Proportional
Setting to define the mode of resistive reach coverage. If ‘Common’ mode is selected, all
phase distance zones will have the equal resistive coverage. If ‘Proportional’ mode is
selected, the zones will have resistive coverage according to the % reach set for the
zone, multiplied by the ‘Fault Resistance’ R
PH
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 between
phases. 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.
Z1 Ph Status Enabled
Enabled or Disabled or Enabled on CH
Fail
To enable (activate) or disable (turn off) or enable (only in the case that differential
protection communication channel is lost) Z1 for phase faults.
This setting is invisible if ‘Phase Char.’ is disabled.
Z1 Phase Reach 80% 10% 1000% 10%
Setting entry as percentage of the line impedance that sets Zone 1 reach in ohms.
Z2 Ph Status Enabled
Enabled or Disabled or Enabled on CH
Fail
As per Z1, but applicable to Zone 2.
Z2 Phase Reach 120% 10% 1000% 10%
Setting entry as percentage of the line impedance that sets Zone 2 reach in ohms.
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