Settings P54x/EN ST/La4
MiCOM P543, P544, P545, P546
(ST) 4-25
ST
Setting range
Menu text Default setting
Min. Max.
Step size
tZP Gnd. Delay 0.4 s 0 s 10 s 0.01 s
Time delay for ZP ground element.
Zone 4 Tripping Phase and Ground
Disabled, Phase only, Ground only, or
Phase and Ground
Setting to select for which types of fault Zone 4 elements will be applied.
tZ4 Ph. Delay 1 s 0 s 10 s 0.01 s
Time delay for Z4 phase element.
tZ4 Gnd. Delay 1 s 0 s 10 s 0.01 s
Time delay for Z4 ground element.
AIDED SCHEME 1
Aid. 1 Selection Disabled
Disabled, PUR, PUR Unblocking, POR,
POR Unblocking, Blocking 1, Blocking 2,
Prog. Unblocking or Programmable
Selection of the generic scheme type for aided channel 1.
equivalent to PUTT (permissive underreach tr
Note: POR is equivalent to POTT (permissive overreach transfer trip), PUR is
ansfer trip).
Aid 1 Distance Phase and Ground
Dis Phase O roundabled, nly, G Only, or
Ph rounase and G d
Setting to select whether elements sho lected as per the
d
b e tripping on ies.
distance uld key the scheme se
previous setting. If set to Disabled, no distance zones interact with this aided scheme, an
asic schem ly appl
Aid. 1 Dist. Dly 0 s 0 s 1 s 0.002 s
Trip time delay for Aided 1 Distance schemes.
Unblocking Delay 0.05 s 0 s 0.1 s 0.002 s
Time delay after Loss of Guard until unblocking occurs. After the set delay, the relay will
r though an aid nal has been rec from the end.
espond as ed sig eived remote
This setting is visible only when PUR Unblocking, POR Unblocking or Programmable
Unblocking schemes are chosen.
Aid. 1 DEF Enabled Disabled or Enabled
Setting to select whether d be mapped to Aided scheme 1.
( ble where a P heme sel as been made).
a DEF scheme shoul
ermissive UnderreachiNot applica ng sc ection h
Aid. 1 DEF Dly 0 s 0 s 1 s 0.002 s
Time delay for Aided 1 DEF tripping.
Aid. 1 DEF Trip 3 Pole 1 or 3 Pole
Setting that defines the tripping mode for Aided
visible on ripping mode unde
Mode is set to 1 and 3 pole.
1 DEF.
r GROUP x LINE PARAMETERS/TripThis setting is ly if t
Aid. 1 Delta Enabled Disabled or Enabled
Setting to select whethe elta directional com ld be ma
ive Underreaching scheme selection has been made).
r a D parison scheme shou pped to
Aided scheme 1.
(Not applicable where a Permiss
Aid. 1 Delta Dly 0 s 0 s Aid. 1 Delta Dly 0 s
Time delay for Aided 1 Delta tripping.
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