Siemens SENTRON 3WL10 Series Manual page 62

Description
2.4 Electronic trip unit ETU
Protection functions of the ETU
DAS DAS (Arc fault mitigation)
Protection function can be enabled/disabled
Setting range for operating value I
I-NBA Phase current unbalance I-NBA
Protection function can be enabled/disabled
Setting range I
Setting range of the delay time t
current unbalance
Enabling/disabling of tripping on phase current
unbalance
ETU powered in at least 2 phases or self-powered with auxiliary voltage. In all other cases,
1)
the following tolerances apply:
L
S
I
G
Other protection functions
60
= I
i_arc
phase current unbalance
nba
for phase
nba
ETU650 LSI
●
x ... 1.5 to 15 (in steps of 0.1)
n
Default value: 1.5
●
2 to 90% (in steps of 1%)
Default value: 50%
0.50 to 60 s (in steps of 0.5)
Default value: 10 s
●
Current setting value
Tripping between 1.05 and 1.2 x I
± 10 %
± 15 %
± 15 %
± 15 %
ETU660 LSIG
●
1.5 to 15 (in steps of 0.1)
Default value: 1.5
●
2 to 90% (in steps of 1%)
Default value: 50 %
0.50 to 60 s (in steps of 0.5)
Default value: 10 s
●
Tripping time
± 20 %
r
± 20 %
≤ 60 ms
± 20 %
± 20 %
Air circuit breaker 3WL10
Manual, 11/2017, L1V30499596002-01