NHP TemBreak PRO - B250_BE - In 250 A

Annex B - Time Current Curves
65
TemBreak PRO B_BE-UM-001-EN  V1.1.0
B250_BE – I
n
250 A
LTD pick up current I
r
100 – 125 – 157 – 200 – 225 – 237 – 250 A (7 steps)
200A (fixed)
250A (fixed)
Instantaneous only
Standard curves 1 - 5
Additional special application curves next pages
Characteristic dial setting
1
2
3
4
5
6
7
8
LTD
t
r
(s)
11
21
21
5
7.5
1
2.5
-
@ 2 x I
r
@ 6 x I
r
@ 600A
@ 750A
-
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
-
-
-
t
sd
(s)
0.1
0.1
0.1
0.1
0.2
-
-
-
INST
I
i
14 x I
r
(Maximum of 13 x I
n
)
800A
1000A
3250A
OCR options
Pre-Trip Alarm
(PTA)
I
p
0.8 x I
r
0.8 x I
r
t
p
(s)
40
40
Neutral Pole
Protection (NP)
I
N
1.0 x I
r
1.0
t
N
(s)
t
N
= t
r
t
N
= t
r
1, 2, 3, 4, 5