Siemens 3VA1 100 A Manual page 114

Applications
3.1 Line protection applications of 3VA molded case circuit breakers
Electronic trip unit ETU350 LSI
ETU350 LSI 3-pole:
ETU350 LSI 4-pole:
Line protection - function LSI
The electronic trip unit ETU350 has:
● adjustable parameter settings I
● adjustable parameter settings I
● fixed parameter setting I
● With 4-pole versions only: Neutral conductor protection (N) which can be deactivated
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and t for overload protection (L)
r r
and t for short-time delayed short circuit protection (S)
sd sd
for instantaneous short-circuit protection (I)
i
3VA molded case circuit breakers
Manual, 04/2015, A5E03603177010-02