Siemens Sentron 3VA - Page 133

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
Manual, 01/2019, L1V30435333-01
131
Neutral conductor protection N:
The neutral conductor protection function is available only for 3-pole molded case circuit
breakers with external current transformer for N conductor for 4-pole molded case circuit
breakers.
•
I
N
Adjustable in steps of 1 A
3-pole
circuit breakers with external current transformer for N conductor:
I
n
= 40 A: 0.4 to 1.6 x I
n
I
n
≥ 100 A: 0.2 to 1.6 I
n
4-pole
circuit breakers:
I
n
= 40 A: 0.4 to 1.6 x I
n
I
n
≥ 100 A: 0.2 to 1.0 or 1.5 / 1.6 x I
n