P54x/EN ST/La4 Settings
(ST) 4-32
MiCOM P543, P544, P545, P546
ST
Setting range
Menu text Default setting
Min. Max.
Step size
>3 Status
Disabled
Disabled, Enabled, Enabled VTS, Enabled
Ch Fail, En VTSorCh Fail, En VTSandCh
Fail
Setting that defines third stage overcurrent operating status. Depending of this setting, I>
will be enabled permanently or in case of Vo
3
ltage Transformer Supervision (fuse fail)
n case of c nication channel a combi (and /or) . operation, or i ommu fail, or nation of both
>3 Directional
Non-directional
Non-directional
Directional Fwd
Directional Rev
N/A
This setting de
element.
termines the direction of measurement for the third stage overcurrent
>3 Current Set 10 x n 0.08 x n 32 x n 0.01 x n
Pick-up setting for third stage overcurrent element.
>3 Time Delay
0 s 0 s 100 s 0.01 s
Setting for the operating time-delay for third stage overcurrent element.
>3 Status
Disabled
Disabled, Enabled, Enabled VTS, Enabled
Ch Fail, En VTSorCh Fail, En VTSandCh
Fail
Setting that defines fourth stage overcurrent operating status. Depending of this setting,
abled perm or in case of Vo ransform ervision e fail) I>3 will be en anently ltage T er Sup (fus
operation, or in case of communication channel fail, or a combination (and /or) of both.
>3 Directional
Non-directional
Non-directional
Directional Fwd
Directional Rev
N/A
This setting de
element.
termines n of measurethe directio ment for the fourth stage overcurrent
>3 Current Set 10 x n 0.08 x n 32 x n 0.01 x n
Pick-up setting for fourth stage overcurrent element.
>3 Time Delay
0 s 0 s 100 s 0.01 s
Setting for the operating time-delay for fourth stage overcurrent element.
> Char. Angle
30° –95° +95° 1°
Setting for the relay cha ic angle used fo ectiona ion. The setting is racterist r the dir l decis
visible only when ‘Directional Fwd’ or ‘Directional Rev’ is set.
> Blocking
00001111
Bit 0 = VTS Blocks >1, Bit 1 = VTS Blocks
>2, Bit 2 = VTS Blocks >3, Bit 3 = VTS
Blocks >4, Bits 5 to 7 are not used.
Logic Settings that determine whether blocking signals from VT supervision affect certain
overcurrent stages.
VTS Block – only affects directional overcurrent protection. With the relevant bit set to 1,
operation of the Voltage Transformer Supervision (VTS), will block the stage. When set to
0, the stage will revert to Non-directional upon operation of the VTS.
If I> Status is set ‘Enabled VTS’, no blocking should be selected in order to provide fault
clearance by overcurrent protection during the VTS condition.
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