GE MiCOM P40 - Page 864

Appendix B -Settings and Signals
P446SV
B118
P446SV-TM-EN-1
MENU TEXT COL ROW DEFAULT SETTING AVAILABLE OPTIONS
DESCRIPTION
When Zero Sequence is selected, this arms the Virtual Current Polarizing.
DEF Char. Angle 39 04 -60
From -95 to 95 in steps of 1
[Courier Number (angle)]
Setting for the relay characteristic angle used for the directional decision.
DEF VNpol Set 39 05 1
From 0.5*V1 to 40*V1 in steps of 0.5*V1
[Courier Number (voltage)]
Setting that must be exceeded by generated neutral displacement voltage VN (= 3.Vo) in order for the DEF function to be operational.
As Virtual Current Polarizing will be in force when Zero sequence polarizing is used, this setting will normally have no relevance. If the relay
phase selector (delta sensitivity typically 4% In) detects the faulted phase, this will artificially generate a large VNpol, typically equal to Vn
(phase-ground). Only if the phase selector cannot phase select will this setting be relevant, as VNpol will then measure true VN.
The setting is invisible if ‘Neg. Sequence’ polarization is set.
DEF V2pol Set 39 06 1
From 0.5*V1 to 25*V1 in steps of 0.5*V1
[Courier Number (voltage)]
Setting that must be exceeded by generated negative sequence voltage V2 in order for the DEF function to be operational.
The setting is invisible if ‘Zero Sequence’ polarization is set.
DEF FWD Set 39 07 0.08
From 0.05*I1 to 1.0*I1 in steps of 0.01*I1
[Courier Number (current)]
Setting the forward pickup current sensitivity for residual current (= 3.Io).
DEF REV Set 39 08 0.04
From 0.03*I1 to 1.0*I1 in steps of 0.01*I1
[Courier Number (current)]
Setting the reverse pickup current sensitivity for residual current (= 3.Io).
GROUP 1: SEF/REF
PROT'N
3A 00
This column contains settings for SEF/REF
SEF/REF Options 3A 01 SEF Enabled
SEF Enabled
Wattmetric SEF
Hi Z REF
[Indexed String]
Setting to select the type of sensitive earth fault protection function and the type of high-impedance function to be used.
ISEF>1 Function 3A 2A DT
Disabled
DT
IEC S Inverse
IEC V Inverse
IEC E Inverse
UK LT Inverse
IEEE M Inverse
IEEE V Inverse
IEEE E Inverse
US Inverse
US ST Inverse
IDG
[Indexed String]
Setting for the tripping characteristic for the first stage sensitive earth fault element.
ISEF>1 Direction 3A 2B Non-Directional
Non-Directional
Directional Fwd
Directional Rev
[Indexed String]
This setting determines the direction of measurement for the first stage sensitive earth fault element.
ISEF>1 Current 3A 2E 0.05
From 0.005*I3 to 0.1*I3 in steps of 0.00025*I3
[Courier Number (current)]
Pick-up setting for the first stage sensitive earth fault element.
ISEF>1 IDG Is 3A 2F 1.5
From 1 to 4 in steps of 0.1
[Courier Number (decimal)]
This setting is set as a multiple of ISEF> setting for the IDG curve (Scandinavian) and determines the actual relay current threshold at which
the element starts.
ISEF>1 Delay 3A 31 1
From 0 to 200 in steps of 0.01
[Courier Number (time-seconds)]
Setting for the time delay for the first stage definite time element.
ISEF>1 TMS 3A 32 1
From 0.025 to 1.2 in steps of 0.005
[Courier Number (decimal)]
Setting for the time multiplier to adjust the operating time of the IEC IDMT characteristic.