Settings P54x/EN ST/La4
MiCOM P543, P544, P545, P546
(ST) 4-49
ST
Setting range
Menu text Default setting
Min. Max.
Step size
CTS Time Delay 5 s 0 s 10 s 1 s
Setting that determines the operating time-delay of the element upon detection of
transformer supervisio
a current
n condition. The setting is common for both CTS algorithms. The
f CTS de is not disabled setting is visible i Mo
CTS VN< Inhibit 5 V 0.5 V 22 V 0.5 V
This setting is used to inhibit the current transformer supervision element should the zero
xcee ing. The sett rd’ or ‘S rd’ + ‘I
hose
sequence voltage e
Diff’ CTS Mode is c
d this sett
n.
ing is visible if ‘Standa tanda
CTS N> Set 0.1 x n 0.08 x n 4 x n 0.01 x n
This setting determines el of zero seque rrent tha e prese
rd’
is ch
the lev nce cu t must b nt for a valid
current transformer supervision condition. The setting is visible if ‘Standard’ or ‘Standa
+ ‘I Diff’ CTS Mode osen.
CTS i1> 0.1*In 0.05*In 4.0*In 0.01*In
Setting that determines if the circuit is loaded. If the positive sequence current calculated
by the relay exceed this value, the relay declares load condition at relay end. The setting
tandard’ + ‘I Diff’ CTS Mode is set. is visible if ‘I Diff’ or ‘S
CTS i2/i1> 0.05 0.05 1 0.01
Setting above which an asymmetrical fault condition or a CT problem is declared. The
setting is visible if ‘I Diff’ or ‘Standard’ + ‘I Diff’ CTS Mode is set.
CTS i2/i1>> 0.4 0.05 1 0.01
Setting above which a CT failure is declared provid t CTS i2 eshold at any
to the differential zone relay has not been exceed. The setting is
ard’ + ‘I Diff’ CTS Mode is set.
ing tha /i1> thr
other CT set connected
Diff’ or ‘Standvisible if ‘I
1.3.20 S . function)
The MiCOM P54x has tage Check tion tha be set
indep
1.3.20.1 S ck sy on
) (P543/P54
T set
i
ystem checks (check sync
a two s Synchronization func t can
endently.
ystem checks (che nc. functi
5)
he MiCOM P543/P545 has a two stage Check Synchronization function that can be
ndependently.
Setting range
Menu text Default setting
Min. Max.
Step size
VOLTAGE MONITORING
Live Voltage 32 V
1 V 132 V 0.5 V
Sets the minimum voltag bove which a lin cogne threshold a e or bus is to be re ized as
being ‘Live’.
Dead Voltage 13 V
1 V 132 V
0.5 V
Sets the voltage threshold below which a line or bus to be recognized as being ‘Dead’.
CHECK SYNC.
Stage 1 Enabled Enabled or Disabled
Setting to enable or disable the first stage check sync. element.
CS1 Phase Angle 20° 0° 90° 1°
Sets the maximum phase angle difference between the line and bus voltage for the first
stage check sync. element phase angle criteria to be satisfied.
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