3.5 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 +/- 5% or 40 ms, whichever is greater
DT operate +/- 2% or 60 ms, whichever is greater
DT reset Setting +/- 5%
Repeatability +/- 5%
Note:
Refer
ence conditions: TMS = 1, TD = 1, IN> setting = 1 A with operating range of 2-20In.
3.5.1 SEF DIRECTIONAL PARAMETERS
Wattmetric SEF accuracy
Pick-up for P = 0 W ISEF > +/-5% or 5 mA
Pick-up for P > 0 W P > +/-5%
Drop-off for P = 0 W 0.95 x ISEF> +/- 5% or 5 mA
Drop-off for P > 0 W 0.9 x P> +/- 5% or 5 mA
Boundary accuracy +/-5% with hysteresis < 1°
Repeatability +/- 5%
SEF CosΦ accuracy
Pick-up Setting +/-5% for angles RCA+/-60°
Drop-off 0.9 x setting
Repeatability +/- 2%
SEF SinΦ accuracy
Pick-up Setting +/-5% for angles RCA+/-60° to RCA+/-90°
Drop-off 0.9 x setting
Repeatability +/- 2%
3.6 RESTRICTED EARTH FAULT PROTECTION
High Impedance and Low Impedance
Pick-up Setting formula +/- 5%
Drop-off 0.8 x Setting formula +/-5%
Operating time < 60 ms
High set pick-up Setting +/- 10%
High set operating time < 30 ms
Repeatability < 15%
Chapter 23 - Technical Specifications P14x
538 P14xEd1-TM-EN-1
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