Alstom MiCOM P54 Series, Technical Manual

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P54x/EN ST/La4 Settings
(ST) 4-12
MiCOM P543, P544, P545, P546
ST
Setting range
Menu text Default setting
Min. Max.
Step size
kZm Mutual Set 1 0 10
Setting of the mutual compensation factor kZm magnitude is calculated as a ratio:

kZm

= ZM
0
/3Z
1
where,
ence mutual impedance for the protected line or cable. ZM
0
= zero sequ
Z
1
= positive sequence impedance for the protected line or cable.
Setting kZm is visible if ‘Mutual Comp’ is enabled.
kZm Mutual Angle
0

-180

90

1

Setting of the mutual compensation angle (in degrees) is calculated as:

kZm
1
Angle setting

kZm is visible if ‘Mutual Comp’ is en
=

ZM
0
/3Z
abled.
Mutual Cut-off 0 2 0.01
Only in models with Distance option
. Setting used to eliminate the mutual compensation
replica in case when the ratio of neutral current of the parallel line to the neutral current of
the protective line (I
MUTUAL
/IN) exceeds the setting. This setting is visible only if ‘Mutual
Comp’ is enabled.
Phase Sequence Standard ABC
Standard ABC, Reverse
ACB Phase
Rotation
This setting is used to select whether the 3 phase quantities (V and I) are rotating in the
standard ABC sequence, or whether the rotation is in reverse ACB order. The appropriate
selection is required to ensure that all derived sequence comp
ulted phase
flagging/targeting are correct.
onents and fa
CB1Tripping Mode 3 Pole 3 pole, 1 and 3 pole Trip Mode
This setting is used to select the tripping mode. The selection
pole
allows single
pole tripping for single phase to ground faults, whilst selection verts any trip
command(s) to three pole tripping.
1 and 3
3 pole
con
CB2Tripping Mode 3 Pole 3 pole, 1 and 3 pole Trip Mode
This setting is used to select the tripping mode. The selection
1 and 3 pole
allows single
pole tripping for single phase to ground faults, whilst selection
3 pole
converts any trip
command(s) to three pole tripping.
Line Charging Y 2.00 mS 0.00 mS 10.00 mS 0.1 mS
Setting for protected lines’ total susceptance in either primary or se
depending on the
Setting Values
reference chosen in the CONF
condary terms,
IGURATION column.
d culate the comp sated overv >1 Funct’ The set value is use to cal en oltage if ‘V1 Cmp
setting is enabled under
GROUP x VOLT PROTECTION
.
1.3.2 D
T
SETUP
is used to:


characteristic (Mho or Quad) for phase and ground measuring loops


ch phase and ground zone independently by simply
impedance (taken as the

Other settings related to application of the “Basic” distance scheme
istance setup (only for models with distance option)
he column
GROUP x DISTANCE
Select the Distance setting mode (Simple or Advanced)
Select the operating
independently
Enable or Disable each phase and ground zone independently
Define the reach (in Ohms) for ea
setting the percentage required reach with reference to the line
100% reference basis)