Settings P54x/EN ST/La4
MiCOM P543, P544, P545, P546
(ST) 4-15
ST
Setting range
Menu text Default setting
Min. Max.
Step size
Z1 Gnd Status Enabled
Enabled or Disabl ableed or En d on CH
Fail
To enable (activate) or (turn off) or case tha ential
f ‘Ground Char.’ is disabled.
disable enable (only in the t differ
protection communication channel is lost) Zone 1 for ground faults.
This setting is invisible i
Z1 Ground Reach 80% 10% 1000% 10%
Setting entry as percentage of the line impedance that sets Zone 1 reach in ohms.
Z2 Gnd Status Enabled
Enabled or Disabled or Enabled on CH
Fail
As per Z1, but applicable to Zone 2.
Z2 Ground Reach 120% 10% 1000% 10%
Setting entry as percentage of the line impedance that sets Zone 2 reach in ohms.
Z3 Gnd Status Enabled
Enabled or Disabled or Enabled on CH
Fail
As per Z1, but applicable to Zone 3.
Z3 Ground Reach 250% 10% 1000% 10%
Setting entry as percentage of the line impedance that sets Zone 3 forward reach in ohms.
Z3 Gnd Offset 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) Zone 3 offset reach for g
By default, Z3 Mho ground characteristic is offset (partly reve
round faults.
rse directional), thus not
rized Offset’ is teristic becomes memory/cross pola . ‘If Z3 Gnd disabled, Z3 Mho charac
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 Gnd Status Enabled
Enabled or Disabled or Enabled on CH
Fail
As per Z1, but applicable to Zone P.
ZP Gnd Dir. Forward Forward/ Reverse
To directionalize ZP forward or reverse.
ZP Ground Reach 200% 10% 1000% 10%
Setting entry as percentage of the line imped s Zone P forward or reverse ance that set
reach in ohms.
Z4 Gnd Status Enabled
Enabled or Disabled or Enabled on CH
Fail
As per Z1, but applicable to Zone 4.
Z4 Ground Reach 150% 10% 1000% 10%
Setting entry as percenta line impedan s. ge of the ce that sets reverse Zone 4 reach in ohm
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