P54x/EN ST/La4 Settings
(ST) 4-54
MiCOM P543, P544, P545, P546
ST
Setting range
Menu text Default setting
Min. Max.
Step size
CB2 CS1 Vdiff 6.5 V
1 V 120 V 0.5 V
Check Synch Voltage differential setting decides that stage 1 System Check Synchronism
logic for CB2 is blocked if Vdiff> is one of the selected options in setting CB2 CS Volt.Blk
(48 9 C), and voltage magnitude difference between line and bus 2 voltage is above this
setting.
CB2 CS1 SlipCtrl Enabled Enabled or Disabled
Setting to enable or disable blocking of synchronism check stage 1 for reclosing CB2 by
excessive frequency difference (slip) between line and bus voltages (refer to setting
CB2 CS1 SlipFreq).
CB2 CS1 SlipFreq 50 mHz 5 mHz 2 Hz 5 mHz
If CB2 CS1 Slip Ctrl is enabled, synchronism check stage 1 is blocked for reclosing CB2 if
measured frequency difference between line and bus voltages is greater than this setting.
CB2 CS2 Status Disabled Enabled or Disabled
Setting to enable or disable the stage 2 synchronism check elements for auto-reclosing
and manual closing CB2.
CB2 CS2 Angle 20° 0° 90° 1°
Maximum permitted phase angle between Line us 2 volt s for second and B age stage
synchronism check element to reclose CB2.
CB2 CS2 Vdiff 6.5 V
1 V 120 V 0.5 V
Check Synch Voltage d ntial setting decid stage 2 System Check sm iffere es that Synchroni
logic for CB2 is blocked if Vdiff> is one of the selected options in setting CB2 CS Volt.Blk
(48 9 C), and voltage magnitude difference between line and bus 2 voltage is above this
setting.
CB2 CS2 SlipCtrl Enabled Enabled or Disabled
Setting to enable or disable blocking of synchronism check stage 2 for reclosing CB2 by
excessive frequency difference (slip) between line and bus voltages (refer to setting
CB2 CS2 SlipFreq)
CB2 CS2 SlipFreq 50 mHz 5 mHz 2 Hz 5 mHz
If CB2 CS2 Slip Ctrl is enabled, synchronism check stage 2 is blocked for reclosing CB2 if
measured frequency difference between line and bus voltages is greater than this setting.
CB2 CS2 Adaptive Disabled Enabled or Disabled
Setting to enable or disabl losing wit roe Adaptive CB c h System Check Synch nism stage
2 closing for CB2: logic uses set CB2 CI Time to issue CB2 close and at such a comm
time that the predicted phase angle difference when CB2 main contacts touch is as close
as possible to 0 degrees. If adaptive closing is di d, the logic issues CB2 sable close
command as soon as p ngle comes withi limit at CB ngle. hase a n set 2CS2 A
CB2 Cl Time 50.0 ms 10.0 ms 0.5 s 1.0 ms
This sets CB2 closing time, from receipt of CB2 clo e command u cts touch s ntil main conta
MAN SYS CHECKS
Num CBs CB1 only CB1 only, CB2 only, CB1 & CB2
This setting is only visible if the CB Control by cell (Cell 0701 under CB CONTROL
column) is ‘Enabled’.
If visible, the setting dictates which of the circuit breakers (CB1 only, CB2 only, or both
CB1 & CB2) can be ma closed. nually
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