Siemens SENTRON 3WA1 - Page 117

Description
2.5 Electronic trip unit ETU600
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
115
ETU600 LSI, ETU600 LSIG, ETU600 LSIG Hi-Z
Protective function Setting range for parameter sets A
and B
Settings with rotary coding switch
only possible in parameter set A
L: Overload protection LT
Tripping
Can be switched on/off
Current setting I
r
0.4 ... 1.0 x I
n
0.5 / 0.6 / 0.7 / 0.75 / 0.8 / 0.85 / 0.9
/ 0.95 / 1.0 x I
n
Tripping time t
r
at 6 x I
r
At I
2
t: 0.5 ... 30 s
At I
4
t: 0.5 … 5 s
1 / 2 / 5 / 8 / 10 / 14 / 17 / 21 / 25 s
Characteristic LT curve
I²t / I
4
t
Thermal memory
Can be switched on/off
Cooling time constant
10 / 18 x t
r
Phase failure detection
Can be switched on/off
Overload pre-alarm PAL
Can be switched on/off
Current setting I
r PAL
0.7 … 1.0 x I
r
Delay time t
r PAL
0.5 … 1.0 x t
r
L: Overload protection LT, neutral conductor
Tripping
Can be switched on/off
Current setting I
rN
3-pole: 0.2 ... 2.0 x I
n
4-pole: 0.2 x I
n
… I
n max
Current setting I
rN PAL
0.7 … 1.0 x I
N
S: Delayed short circuit protection ST
Tripping
Can be switched on/off
Current setting I
sd
0.6 x I
n
… 0.8 x I
cw
max. 0.8 I
cw
1)
1.5 / 2 / 2.5 / 3 / 4 / 5 / 6 / 8 / 10 x I
r
max. 0.8 x I
cw
1)
Tripping time t
sd
0.02 … 0.4 s
At I
2
t = OFF:
0.08 / 0.15 / 0.22 / 0.3 / 0.4 s
At I
2
t = ON:
0.1 / 0.2 / 0.3 / 0.4 s
Characteristic ST curve
I
0
t / I
2
t
Reference point I
ST ref
6 … 12 x I
r
Intermittent detection
Can be switched on/off
S: Directed short-time-delayed short-circuit protection dST (optional)
Tripping
Can be switched on/off
Direction setting
forward: ↓ or ↑
Current setting I
sd
FW
0.6 x I
n
… max. 0.8 x I
cw
1)
Current setting I
sd
REV
0.6 x I
n
… max. 0.8 x I
cw
1)
Tripping time t
sd
FW
0.05 … 0.4 s
Tripping time t
sd
REV
0.05 … 0.4 s
I: Instantaneous short-circuit protection INST
Tripping
Can be switched on/off
Current setting I
i
1.5 x I
n
… 0.8 x I
cs
max. 0.8 I
cs
1)
1.5 / 2 / 3 / 4 / 6 / 8 / 10 / 12 / 15 x
I
n
max. 0.8 I
cs
1)