Sices D-PRO, Technical Manual

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36 D-PRO Protection relay Technical Manual
Type: Alarm
Measuring: IB0-IB1-IB2 Phase current low part
Iaux or Itor Auxiliary current or toroid current (51N)
Related parameters: P.0101 Genset phases number
P.0102 Genset nominal voltage
P.0351 Curve selection (51 Protection)
P.0352 Maximum current threshold
P.0353 Maximum current delay
P.0354 Curve selection (51N Protection)
P.0355 Neutral maximum current threshold
P.0356 Neutral maximum current delay
P.0357 Curve selection (51V Protection)
P.0358 Maximum current threshold (% restrained overcurrent)
P.0359 Maximum current delay (% restrained overcurrent)
To disable:
P.0353=0; P.0356=0; P.0359=0
The parameters P.0351
– P.0354 – P.0357 allow to choose the curve to use for the protection
among the following:
•
0 = SICES
– Extremely inverse
•
1 = IEC
– Extremely inverse
•
2 = IEC
– Very inverse
•
3 = ANSI
– Extremely inverse (not implemented yet)
Current threshold reduction
Genset voltage (% nom)
40%
Cu
rr
e
n
t t
h
re
sh
o
ld
20%
60%
80%
100%
120%
0%
0%
40%
20% 60% 80%
100% 120%