NHP TemBreak PRO P - Page 33

Protection Settings
Short Time Delay Protection (STD)
I
2
t function for STD
33
TemBreak PRO P_BE-UM-001-EN V1.3.0
The I
2
t curve is based on the setting of I
r.
The below time current graph illustrates the effect of the I
2
t curves calculated for different I
r
settings.
Settings
I
2
t ONLY
base on I
r
=630A
Full curve
with I
2
t enabled
I
r
630A
350A
t
r
5s
5s
I
sd
1.5
3
t
sd
50ms
50ms
I
i
11
9
I
2
t
Enabled
Enabled