Siemens SENTRON 3WL10 Series Manual page 59

Protection functions of the ETU
S ST: Short-time-delayed short-circuit protection
Protection function can be enabled/disabled
Setting range of operating value I
Short-circuit protection characteristic
Setting range for delay time t
Setting range for delay time t
(reference point 10 x I
Tripping can be deactivated
Switchover to alternative operating values with
short-time-delayed short-circuit 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 Isd = In x ... during the switch-on
phase (inrush adaptation)
I INST: Instantaneous short-circuit protection I
Protection function can be enabled/disabled
Setting range for operating value I
Switchover to alternative operating values with
instantaneous short-circuit 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)
N Neutral protection
Neutral protection can be enabled/disabled
Current setting value I
Air circuit breaker 3WL10
Manual, 11/2017, L1V30499596002-01
= I x ...
sd n
(fixed delay) t=k
sd
at I²t
sd
)
n
= I x ...
i n
= I x ... during the switch-on
i n
= I x ...
N n
ETU650 LSI
●
0.6 to 10 (in steps of 0.1)
Default value: OFF
Tolerance :
1)
± 7% I ≤ 6 x I
n
± 10% I ≤ 6 x I
n
Switchable
I²t / t = constant
0.05 to 0.4 s (in steps of
0.01)
Default value: 0.05
Tolerance : The better value
1)
out of ± 10 % or ± 40ms
0.05 to 0.5 s (inverse-time in
relation to I²t) (in steps of
0.01)
●
●
Default value: OFF
0.1 to 30 s (in steps of 0.01)
Default value: 0.1
0.6 to 10 (in steps of 0.1)
Default value: 10
i
●
1.5 to 15 (in steps of 0.1)
Default value: 2
Tolerance : ± 10%
1)
●
Default value: OFF
0.10 to 30 s (in steps of 0.01)
Default value: 0.1
Tolerance : ≤ 30 ms
1)
1.5 to 15 (in steps of 0.1)
Default value: 1.5
●
50 %; 100 %; 150 %; 200 %
Description
2.4 Electronic trip unit ETU
ETU660 LSIG
●
0.6 to 10 (in steps of 0.1)
Default value: OFF
Tolerance :
1)
± 7% I ≤ 6 x I
n
± 10% I ≤ 6 x I
n
Switchable
I²t / t = constant
0.05 to 0.4 s (in steps of
0.01)
Default value: 0.05
Tolerance : The better value
1)
out of ± 10 % or ± 40ms
0.05 to 0.5 s (inverse-time in
relation to I²t) (in steps of
0.01)
●
●
Default value: OFF
0.1 to 30 s (in steps of 0.01)
Default value: 0.1
0.6 to 10
(in steps of 0.1)
Default value: 10
●
1.5 to 15 (in steps of 0.1)
Default value: 2
Tolerance : ± 10%
1)
●
Default value: OFF
0.10 to 30 s (in steps of 0.01)
Default value: 0.1
Tolerance : ≤ 30 ms
1)
1.5 to 15 (in steps of 0.1)
Default value: 1.5
●
50 %; 100 %; 150 %; 200 %
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