NHP TemBreak PRO P, User Manual

Page: 33 / 66

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