Siemens SENTRON 3WL10 Series Manual page 60

Description
2.4 Electronic trip unit ETU
Protection functions of the ETU
G GF: Ground-fault protection
Protection function can be enabled/disabled
Characteristic
Setting range for operating value I
Setting range for delay time t
Setting range for delay time t
(reference point 2 x I
Ground-fault protection pre-alarm
Tripping can be deactivated
Switchover to the alternative of the external,
directly measured ground-fault protection
Switchover to alternative operating values with
ground-fault current during the switch-on phase
(inrush adaptation) for tripping characteristic t=k
(fixed) possible
Setting range of the switch-on phase
(inrush adaptation)
Setting range I
phase (inrush adaptation)
Extended parameter range with ext. auxiliary
power supply of the ETU
58
= I x ...
g n
(fixed) t=k
g
at I²t
g
)
g
= I x ... during the switch-on
g n
ETU650 LSI
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ETU660 LSIG
●
I²t / t = constant
Default value: t = constant
0.1 to 1 (in steps of 0.001)
Default value: 0.1
Tolerance : ± 7%
1)
0.1 to 1 s (in steps of 0.05)
Default value: 0.1 s
Tolerance : The better value
1)
out of ± 10% or ± 40 ms or
50 ms with
t = instantaneous
g
0.1 to 1 s (in steps of 0.05)
50 to 90 % x I (in steps of
r
1 %)
Default value: 90 %
●
●
Default value: OFF
●
Default value: OFF
0.1 to 30 s (in steps of 0.01)
Default value: 0.1
0.2 to 1 (in steps of 0.01)
Default value: 1
- I full range,
g
otherwise I limited to
g
min. 0.2 I or 0.25 I (for
n n
I = 400 A)
n
- t possible instantaneously
g
Air circuit breaker 3WL10
Manual, 11/2017, L1V30499596002-01