GE P24DM - Earth Fault Directional Parameters; Sensitive Earth Fault Protection

Measured and Derived
DT Pick-up Setting +/- 5%
Drop-off (IDMT and DT) for IN1 0.95 x Setting +/-5%
Drop-off (IDMT and DT) for IN2 0.9 x Setting +/-5%
IDMT operate
+/- 5% or 60 ms, whichever is greater (1.05 – 2) Is
+/- 5% or 40 ms, whichev
er is greater (2 – 20) Is
Disengagement < 40 ms
DT operate
+/- 2% or 70 ms, whichever is greater (1.05 – 2) Is
+/- 2% or 50 ms, whichever is greater (2 – 20) Is
DT reset Setting +/- 5%
Repeatability +/- 2.5% (measured), +/-5% (derived)
3.2.1 EARTH FAULT DIRECTIONAL PARAMETERS
Zero Sequence Polarising accuracy
Directional boundary pick-up (RCA +/- 90°) +/-2°
Hysteresis <3°
VN> pick-up Setting+/-10%
VN> drop-off 0.9 x Setting +/-10%
Negative Sequence Polarising accuracy
Directional boundary pick-up (RCA +/- 90°) +/-2°
Hysteresis <3°
VN2> pick-up Setting+/-10%
VN2> drop-off 0.9 x Setting +/-10%
IN2> pick-up Setting+/-10%
IN2> drop-off 0.9 x Setting +/-10%
3.3 SENSITIVE EARTH FAULT PROTECTION
IDMT pick-up 1.05 x Setting +/-5%
DT Pick-up Setting +/- 5%
Drop-off (IDMT + DT) 0.95 x Setting +/-5%
IDMT operate
+/- 2% or 70 ms, whichever is greater (1.05 - <2) Is
+/- 2% or 50 ms, whichev
er is greater (2 - 20) Is
Disengagement < 40 ms
DT operate
+/- 2% or 70 ms, whichever is greater (1.05 - <2) Is
+/- 2% or 50 ms, whichever is greater (2 - 20) Is
DT reset Setting +/- 5%
Repeatability +/- 5%
Note:
SEF claims apply to SEF input currents of no more than 2 x In. For input ranges above 2 x In, the claim is not supported.
P24xM Chapter 21 - Technical Specifications
P24xM-TM-EN-2.1 435