Applications
3.2 Line protection applications of 3VA molded case circuit breakers
3VA molded case circuit breakers with IEC certificate
Manual, 03/2019, A5E03603177010-03
119
Electronic trip unit ETU330 LIG
ETU330 LIG 3-pole:
ETU330 LIG 4-pole:
Line protection - function LIG
The ETU330 electronic trip unit has:
● Adjustable parameter settings I
r
and t
r
for overload protection (L)
● Adjustable parameter setting I
i
for instantaneous short-circuit protection (I)
● Adjustable parameter settings I
g
and t
g
for ground-fault protection (G)
● With 4-pole versions only: Neutral conductor protection (N) which can be deactivated
● Permanently active thermal memory, cannot be deactivated
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