Ormazabal ekor.rps - Neutral overcurrent protection

IG-150-EN version 04; 03/10/16
56
Protection functions. Description and settings General instructions
ekor.rps
4.1.5. Settings ranges of the instantaneous characteristic (high level) (6 tables)
Setting Min Max Step Notes
Enable
YES/NO/pick up
Phase instantaneous trip [A]
0.02 40.00 0.01 With standard ratings
0.1 200.0 0.01 With specied ratings
Additional time [s]
0.00 60.00 0.01
These settings can be found in the console on the screen “instantaneous overcurrent prot. (HIGH1)”. INSTANT PHASES box (HIGH).
Table 4.3. Settings ranges of the instantaneous characteristic
The characteristics of the times are the same as in the
previous paragraph.
4.2. Neutral overcurrent protection
4.2.1. General description
In neutral earthed installations, the neutral overcurrent
protection has the same possible characteristics as the
described for phase overcurrent, and independent settings
(function 50N/51N).
4.2.2. Setting ranges of the timed characteristic (6 tables) (normal and HIGH2)
Setting Min Max Step Notes
Enable
YES/NO/pick up/YES+drop
Pick up [A]
0.010 20,000 0.001 With standard ratings
0.1 200.0 0.01 With specied ratings
Curve type
Denite time
Normal curve, very inverse, extrem. inverse, etc.
User curve
Time index
0.05
0.5
1.09
30.0
0.01
0.1
For IEC curves
For ANSI curves
Denite time [s]
0.0 600.0 0.01
These settings can be found in the console on the screen “overcurrent protection(1)”. NEUTRAL TIME SETTING box.
Table 4.4. Setting ranges of the timed characteristic
The remarks about curves and accuracy are the same as the
ones quoted for phases.