Siemens Sentron 3VA - Page 114

Applications
3.1 Use of the 3VA UL molded case circuit breakers in line protection
3VA molded case circuit breakers with UL and IEC certification
112 Manual, 01/2019, L1V30435333-01
Instantaneous short-circuit protection I:
•
I
i
Adjustable in 10 steps from 1.5 to 9 / 10 / 11 / 12 x I
n
(dependent on the frame
size)
Ground-fault protection G:
•
I
g
Adjustable in 5 steps of 0.2 / 0.25 / 0.4 / 0.6 to 1.0 x I
n
(depending on size)
•
t
g
Adjustable to 100 ms or 300 ms, at 2 x I
g
in each case
The ground-fault protection cannot be deactivated.
Neutral conductor protection N:
The neutral conductor protection function is available for 4-pole molded case circuit breakers
only.
•
I
N
I
n
< 100 A: 1.0 x I
r
or OFF
I
n
≥ 100 A: 0.5 / 1.0 x I
r
or OFF