Siemens SENTRON 3WA1 Manual page 555

ETU600 electronic trip unit
The rotary coding switches of the ETU600 electronic trip unit have the following settings
when delivered ex works.
The tables below list the basic settings of the parameter sets for the ETU600 on delivery
from the factory.
ETU600 LSI, ETU600 LSIG, ETU600 LSIG Hi-Z
Protective function
L: Overload protection LT
Tripping
Current setting I
r
Tripping time t at 6 x I
r r
Characteristic LT curve
Thermal memory
Cooling time constant
Phase failure detection
Overload pre-alarm PAL
Current setting I
r PAL
Delay time t
r PAL
L: Overload protection LT, neutral conductor
Tripping
Current setting I
rN
Current setting I
rN PAL
S: Short-time-delayed short-circuit protection ST
Tripping
Current setting I
sd
Tripping time t
sd
Characteristic ST curve
Reference point I
ST ref
Intermittent detection
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
A.1 Basic settings of the electronic trip unit on delivery
Basic setting
On
0.4 x I
n
0.5 s
I²t
Off
18 x t
r
Off
Off
0.7 x I
r
1.0 x t
r
Off
0.2 x I
n
0.7 x I
N
On
0.6 x I
n
0.1 s
I t
0
8
Off
Appendix
553