ABB REJ 523, Техническое справочное руководство

Страница: 30 / 68

REJ 523 Technical Reference Manual
ABB Substation Automation
Products and Systems
MRS750940-MUM
30
4.1.3.4 Technical data of protection functions
Table 4.1.3.4-1 Stages I> and I>>
Feature Stage I>
1)
Stage I>>
1)
Start current
•
at definite-time characteristic 0.30...5.00 x I
n
0.30...35.0 x I
n
and
∞
•
at inverse-time characteristic
2)
0.30...2.50 x I
n
Start time, typical 55 ms 30 ms
Time/current characteristic
•
definite-time
•
operate time t> 0.05...300 s 0.04...300 s
•
inverse definite minimum time
(IDMT) characteristic as per
IEC 60255-4 and BS 142
Extremely inverse
Very inverse
Normal inverse
Long-time inverse
•
special type inverse
characteristic
RI-type inverse
RD-type inverse
•
time multiplier k 0.05...1.00
Retardation time 30 ms 30 ms
Reset ratio, typical 0.96 0.96
Operate time accuracy at
definite-time mode
±
2 % of set value or
±
25 ms
±
2 % of set value or
±
25 ms
Accuracy class index E at
inverse-time mode 5
Operation accuracy
•
0.3...0.5 x I
n
±
5 % of set value
±
5 % of set value
•
0.5...5.0 x I
n
±
3 % of set value
±
3 % of set value
•
5.0...35.0 x I
n
±
3 % of set value
1)
Note!
Operation of the low-set stage, based on the inverse-time characteristic, can be
blocked by starting of the high-set stage if this function is selected in SGF. If set in
SGF, the operate time is determined by the set operate time of the high-set stage at
heavy fault currents. In order to obtain a trip signal, the high-set stage must be routed
to a trip output contact.
2)
Note!
At inverse-time characteristic the relay allows settings above 2.5 x I
n
for stage I>, but
regards any setting > 2.5 x I
n
as equal to 2.5 x I
n
.