Siemens Sentron 3VA Manual page 127

Electronic trip units ETU556 LSI G (alarm-only) and ETU856 LSI G (alarm-only)
ETU556 LSI(G) 3-pole and 4-pole:
ETU856 LSI(G) 3-pole and 4-pole:
Line protection - function LSI(G)
The electronic trip units ETU556 and ETU856 have:
● Adjustable parameter settings I
● Adjustable parameter settings I
● Adjustable parameter setting I
● Adjustable parameter settings I
● With 4-pole versions: adjustable parameter setting I
optionally available for 3-pole versions
3VA molded case circuit breakers with UL and IEC certification
Manual, 01/2019, L1V30435333-01
3.1 Use of the 3VA UL molded case circuit breakers in line protection
and t for overload protection (L)
r ld
and t for short-time delayed short circuit protection (S)
sd sd
for instantaneous short-circuit protection (I)
i
and t for ground-fault alarm (G)
g g
for neutral conductor protection (N)
N
Applications
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