3.7 NEGATIVE SEQUENCE OVERCURRENT 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%
3.7.1 NPSOC DIRECTIONAL PARAMETERS
Directional boundary pick-up (RCA +/-90%) +/-2°
Directional boundary hysteresis < 2°
Directional boundary repeatability < 2%
3.8 CIRCUIT BREAKER FAIL AND UNDERCURRENT PROTECTION
I< Pick-up Setting +/- 5% or 20 mA, whichever is greater
I< Drop-off 100% of setting +/- 5% or 20 mA, whichever is greater
Timers +/- 2% or 50 ms, whichever is greater
Reset time < 35 ms
3.9 BROKEN CONDUCTOR PROTECTION
Pick-up Setting +/- 2.5%
Drop-off 0.95 x Setting +/- 2.5%
DT operate +/- 2% or 40 ms, whichever is greater
Reset time <25 ms
3.10 THERMAL OVERLOAD PROTECTION
Thermal alarm pick-up Calculated trip time +/- 10%
Thermal overload pick-up Calculated trip time +/- 10%
Cooling time accuracy +/- 15% of theoretical
Repeatability <5%
Note:
Operating time measured with applied current of 20% above thermal setting.
P14x Chapter 23 - Technical Specifications
P14xEd1-TM-EN-1 539
To Next Page
Loading...
Need help?
General
