NHP TemBreak PRO - B1250_BE - In 1250 A

Annex B - Time Current Curves
83
TemBreak PRO B_BE-UM-001-EN  V1.1.0
B1250_BE – I
n
1250 A
LTD pick up current I
r
500 – 630 – 790 – 875 – 940 – 1000 – 1060 – 1125 – 1190 – 1250 A (10 steps)
Standard curves 1 - 7
Additional special application curves
next pages
Characteristic dial
setting
1
2
3
4
5
6
7
8
9
10
LTD
t
r
(s)
11
21
21
5
5
10
29
46
1
-
@ 2 x I
r
@ 6 x I
r
1.5 x I
r
@ 3 x I
r
-
STD
I
sd
2.5 x I
r
2.5 x I
r
5 x I
r
10 x I
r
-
10 x I
r
10 x I
r
1.6 x I
r
-
-
t
sd
(s)
0.1
0.1
0.1
0.1
-
0.2
0.2
0.05
-
-
INST
I
i
14 x I
r
(Maximum of 12 x I
n
)
10 x I
r
14 x I
r
(Maximum of 12 x I
n
)
2.5 x I
r
10 x I
r
12 x I
r
OCR options
Pre-Trip Alarm
(PTA)
I
p
0.8 x I
r
0.8 x I
r
t
p
(s)
40
40
Ground Fault
(GF)
I
g
0.2 x I
r
0.2 x I
r
t
g
(s)
0.2
0.2
Neutral Pole
Protection
(NP)
I
N
1.0 / 1.5 x I
r
1.0 / 1.5 x I
r
t
N
(s)
t
N
= t
r
t
N
= t
r
1, 2, 3, 4, 5, 6, 7
B1250_BE