Phase Overcurrent Directional Parameters; Earth Fault Protection; Earth Fault Directional Parameters - GE P4A Technical Manual

P54A/B/C/E
IDMT operate
IEEE reset
DT operate
DT reset
Repeatability
Characteristic UK
Characteristic US
Note:
*Reference conditions: TMS = 1, TD = 7, I> = 1A, operating range = 2-20In
3.4.1

PHASE OVERCURRENT DIRECTIONAL PARAMETERS

Directional boundary pickup (RCA +/-90%)
Directional boundary hysteresis
Directional boundary repeatability
3.5

EARTH FAULT PROTECTION

IDMT pick-up
DT pick-up
Drop-off (IDMT and DT)
IDMT Operate
IEEE reset
Repeatability
DT operate
DT reset
Note:
Reference conditions: TMS = 1, TD = 1, IN> = 1A, operating range = 2-20In.
3.5.1

EARTH FAULT DIRECTIONAL PARAMETERS

Directional boundary pick-up (RCA +/- 90°)
Hysteresis
VN> pick-up
VN> drop-off
Directional boundary pick-up (RCA +/- 90°)
P54xMED-TM-EN-1
Accuracy
+/-5% of expected operating time or 40 ms, whichever is greater*
+/-5% or 40 ms, whichever is greater
+/-2% of setting or 40 ms, whichever is greater
Setting +/-5%
<5%
IEC 60255-3 1998
IEEE C37.112 1996
Accuracy
+/-2°
< 2°
<2%
Accuracy
1.05 x Setting +/-5%
Setting +/-5%, or 20 mA, whichever is greater
0.95 x setting +/-5%
+/-5% or 40 ms, whichever is greater*
+/-10% or 40 ms, whichever is greater
< 5%
+/-2% or 50 ms, whichever is greater
+/- 5% or 50 ms, whichever is greater
Zero Sequence Polarising accuracy
+/-2°
<3°
Setting+/-10%
0.9 x Setting +/-10%
Negative Sequence Polarising accuracy
+/-2°
Chapter 22 - Technical Specifications
513