NHP TemBreak PRO, User Manual

Page: 59 / 105

59
TemBreak PRO
B_BE-UM-001-EN
– V1.1.0
Annex B - Time Current Curves
B250_BE – I
n
40 A
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 A dditional 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
1, 2, 3, 4, 5