Applications
3.2 Line protection applications of 3VA molded case circuit breakers
3VA molded case circuit breakers with IEC certificate
116 Manual, 03/2019, A5E03603177010-03
Electronic trip unit ETU320 LI
ETU320 LI 3-pole:
ETU320 LI 4-pole:
Line protection - function LI
The ETU320 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)
● With 4-pole versions only: Neutral conductor protection (N) which can be deactivated
● Permanently active thermal memory, cannot be deactivated
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