Settings P54x/EN ST/La4
MiCOM P543, P544, P545, P546
(ST) 4-27
ST
Setting range
Menu text Default setting
Min. Max.
Step size
AIDED SCHEME 2
All the settings are similar to AIDED SCHEME 1 above. Elements are mapped to the
second scheme when they are wished to run independent of Aided Scheme 1.
Trip On Close
SOTF Status Enabled Pole Dead Disabled, Enabled Pole Dead, Enabled
ExtPulse, En Pdead + Pulse
Setting that enables
note
( or disables (tu rotection logic which
ic detection logic
ing both
turns on) rns off) a special p
can apply upon line energization. SOTF = Switch on to Fault.
Note: SOTF can be enabled in three different manners:
1. Enabled Pole Dead. By using pole dead log
2. Enabled ExtPulse. By using an external pulse
3. En Pdead + Pulse. By us
SOTF Delay 110 s 0.2 s 1000 s 0.2 s
The SOTF Delay is a pick up time delay that starts after
CB is then closed after the set time delay has expired, SOTF
opening all 3 poles of a CB. If the
protection will be active.
SOTF provides enhanced protection for manual closur (not for
auto-
This setting is visible only if Pole Dead or Pdead + Pul ect e SOTF.
e of the breaker
reclosure).
se are sel ed to enabl
SOTF Tripping 000001
Bit 0 = Zone 1, Bit 1 = Zone 2,
Bit 2 = Zone 3, Bit 3 = Zone P,
Bit 4 = Zone 4, Bit 5 = Current No Volt
Logic Settings that determine the Distance zones that are allowed to operate
upon line energization. If, for example, Bit 1 is set to 1 (High),
waiting f usual tZ2 time delay should a fa ithin Z2
p ‘Currents No Volt’ option for fast fault clearance upon
SOTF ing is 3 phase and auto-reclose will be blocked.
instantaneously
operate without
Z2 will
upon CBor the ult lie w
closure. It also allows a user to ma
line energization. tripp
TOR Status Enabled Disabled or Enable d
Setting that enables (turns on) or disables (turns off) special protection following
hen se be
expired, read o R = Trip on
auto-reclosure. W
y for applicati
t Enabled, TOR will
on when an auto-recl
activated after the ‘TOC Delay’ has
se shot occurs. TO
(auto)Reclose.
TOR Tripping 000001
Bit 0 = Zone 1, Zone 2,Bit 1 =
Bit 2 = Zone 3, Zone P,Bit 3 =
Bit 4 = Zone 4, Bit 5 = Current No Volt
Logic Settings that deter e Distance zone t are allow
n. If, for example, Bit 1 is set to 1 (High), Z2 will
delay should a fault lie within Z2 upon CB
lows a s N on
perma ing -reclose will be
mine th s tha ed to operate
instantaneously upon line energizatio
operate without waiting for the usual tZ2 time
closure. It also al
line reclosure on a
user to map ‘Current
nent fault. TOR tripp
o Volt’ option for fast fault clearance up
is 3 phase and auto
blocked.
TOC Reset Delay 0.5 s 0.1 s 2 s 0.1 s
The TOC Reset Delay is a user settable
available. The time window starts ti
time window during which TOC protection is
ming upon CB closure and it is common for SOTF and
Once th r expires after a essful (re) e, all prot
rev
TOR protection.
erts to normal.
is time succ closur ection
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