Appendix B -Settings and Signals
MENU TEXT COL ROW DEFAULT SETTING AVAILABLE OPTIONS
DESCRIPTION
En VTSorCh Fail
En VTSandCh Fail
Setting that defines fourth stage overcurrent operating status. Depending of this setting, IN>4 will be enabled permanently or in case of
Voltage Transformer Supervision (fuse fail) operation, or in case of communication channel fail, or a combination (and /or) of both.
IN>4 Direction 38 4E Non-Directional
Directional Fwd
Directional Rev
This setting determines the direction of measurement for the earth fault overcurrent element.
IN>4 Current Set 38 51 10
From 0.08*I1 to 32*I1 in steps of 0.01*I1
[Courier Number (current)]
Pick-up setting for fourth stage earth fault overcurrent element.
IN>4 Time Delay 38 52 0
From 0 to 200 in steps of 0.01
[Courier Number (time-seconds)]
Setting for the operating time-delay for fourth stage earth fault overcurrent element.
IN> Blocking 38 54 0x00F
VTS Blocks IN>2
VTS Blocks IN>3
VTS Blocks IN>4
Logic Settings that determine whether blocking signals from VT supervision affect certain earth fault overcurrent stages.
VTS Block - only affects directional earth fault 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 IN> Status is set ‘Enabled VTS’, no blocking should be selected in order to provide earth fault clearance by earth fault overcurrent
protection during VTS condition.
IN> Char Angle 38 56 -60
From -95 to 95 in steps of 1
[Courier Number (angle)]
Setting for the relay characteristic angle used for the directional decision. The setting is visible only when ‘Directional Fwd’ or ‘Directional
Rev’ is set.
IN> Polarisation 38 57 Zero Sequence
Neg Sequence
Setting that determines whether the directional function uses zero sequence or negative sequence voltage polarizing.
IN> VNpol Set 38 59 1
From 0.5*V1 to 40*V1 in steps of 0.5*V1
[Courier Number (voltage)]
Setting for the minimum zero sequence voltage polarizing quantity for directional decision. Setting is visible only when ‘Zero Sequence’
polarization is set.
IN> V2pol Set 38 5A 1
From 0.5*V1 to 25*V1 in steps of 0.5*V1
[Courier Number (voltage)]
Setting for the minimum negative sequence voltage polarizing quantity for directional decision. Setting is visible only when ‘Negative
Sequence’ polarization is set.
IN> I2pol Set 38 5B 0.08
From 0.08*I1 to 1.0*I1 in steps of 0.01*I1
[Courier Number (current)]
Setting for the minimum negative sequence current polarizing quantity for directional decision. Setting is visible only when ‘Negative
Sequence’ polarization is set.
This column contains settings for Aided DEF
DEF Status 39 02 Enabled
Enabled
To enable (activate) or disable (turn off) the Directional Earth Fault element that is used in an aided scheme (= ground overcurrent pilot
scheme). This setting is invisible if disabled in ‘CONFIGURATION’ column.
DEF Polarizing 39 03 Zero Sequence
Neg Sequence
Setting that defines the method of DEF polarization. Either zero, or negative sequence voltage can be taken as the directional reference.
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