Alstom MiCOM P546 - Page 128

P54x/EN ST/La4 Settings
(ST) 4-50 MiCOM P543, P544, P545, P546
ST
Setting range
Menu text
Min. Max.
Default setting Step size
CS1 Slip Control Frequency Frequency/Both/Timer/None
Setting that determines whether slip control is by slip frequency only, frequen r
timer only criteria to satisfy the first stage check sync. conditions.
mer o ncy + timer is selected, the combination of pha gl
timer settings determines an effective maximum slip frequency, calculated as:
2 x A
cy + timer o
If slip control by ti r freque se an e and
T x 360
Hz. for Check Sync. 1, or
Whe
re:
A = Phase angle setting ()
T = Slip timer setting (seconds)
CS1 Slip Freq. 50 mHz 10 mHz 1 Hz 10 mHz
Sets the maximum frequency difference between the line and bus voltage for the first
stage check sync. elem uency to be satisfied. ent slip freq
CS1 Slip Timer 1 s 0 s 99 s 0.01 s
Minimum operating time-delay setting for the first stage check sync. element.
CS2 Status Enabled Enabled or Disabled
Setting to enable or disa cond stage cheble the se ck sync. element.
CS2 Phase Angle 20° 0° 90° 1°
Sets the maximum phase angle difference between the line and bus voltage for the
second stage check sync. element phase angle criteria to be satisfied.
CS2 Slip Control Frequency Frequency/Both/Timer/None
Setting that determines whether slip control is by slip frequency only, frequency + timer or
timer only criteria to satisfy the CS1 conditions.
If Sli Timer or er is se , the com n of P
and Timer settings determines an effective maximum slip frequency, calculated as:
p Control by Frequency + Tim lected binatio hase Angle
A
T x 360
Hz. for Check Sync. 2, or
gle settin
setting (
re for decreasing angles of slip,
rcuit bre always clo lim ed by .
Where:
A = Phase an
T = Slip timer
g ()
seconds)
Unlike Check Sync. 1, Check Sync. 2 only permits closu
therefore the ci aker should se within the its defin Check Sync
2.
CS2 Slip Freq. 50 mHz 10 mHz 1 Hz 10 mHz
Slip frequency setting for the second stage check sync. element.
CS2 Slip Timer 1 s 0 s 99 s 0.01 s
Setting for the second stage Check Sync. slip timer.
CS Undervoltage 54 V 10 V 132 V 0.5 V
Sets an undervoltage threshold above which the line and bus voltage must be to satisfy
the Check Sync. condition if selected in the ‘CS Voltage Block’ cell.