NHP TemBreak PRO - Page 60

Annex B - Time Current Curves
B250_BE – I
n
40 A
60
TemBreak PRO B_BE-UM-001-EN  V1.1.0
LTD pick up current I
r
16 – 20 – 25 – 32 – 36 – 38 – 40 A (7 steps)
30A (fixed)
40A (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
@ 90A
@ 120A
-
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
)
250A
300A
520A
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
6
7
B250_BE
B250_BE