Restricted Earth Fault Protection; Negative Sequence Overcurrent Protection; Npsoc Directional Parameters - GE MiCOM P40 Agile Technical Manual

Chapter 22 - Technical Specifications
Pick-up
Drop-off
Repeatability
Pick-up
Drop-off
Repeatability
3.4

RESTRICTED EARTH FAULT PROTECTION

Pick-up
Drop-off
Operating time
High pick-up
High operating time
Repeatability
Pick-up
Drop-off
Operating time
High pick-up
High operating time
Repeatability
3.5

NEGATIVE SEQUENCE OVERCURRENT PROTECTION

IDMT pick-up
DT pick-up
Drop-off (IDMT + DT)
IDMT operate
Disengagement
DT operate
DT Reset
3.5.1

NPSOC DIRECTIONAL PARAMETERS

Directional boundary pick-up (RCA +/-90%)
474
SEF CosΦ accuracy
Setting +/-5% for angles RCA+/-60°
0.9 x setting
+/- 2%
SEF SinΦ accuracy
Setting +/-5% for angles RCA+/-60° to RCA+/-90°
0.9 x setting
+/- 2%
High Impedance Retricted Earth Fault (REF) accuracy
Setting formula +/- 5%
0.95 x Setting formula +/-5%
< 60 ms
Setting +/- 10%
< 30 ms
< 15%
Low Impedance Retricted Earth Fault (REF) accuracy
Setting formula +/- 5%
0.9 x Setting formula +/-5%
< 60 ms
Setting +/- 5%
< 30 ms
< 15%
1.05 x Setting +/-5%
Setting +/- 5%
0.95 x Setting +/-5%
+/- 5% or 60 ms, whichever is greater (1.05 – <2) Is
+/- 5% or 40 ms, whichever is greater (2 – 20) Is
< 40 ms
+/- 2% or 70 ms, whichever is greater (1.05 – <2) Is
+/- 2% or 50 ms, whichever is greater (2 – 20) Is
Setting +/- 5%
+/- 2°
P14D
P14D-TM-EN-8