Appendix; Basic Settings Of The Electronic Trip Unit On Delivery - Siemens SENTRON 3WA1 Manual

Appendix

A.1

Basic settings of the electronic trip unit on delivery

ETU300 electronic trip unit
The rotary coding switches of the ETU300 electronic trip unit have the following settings
when delivered ex works.
The tables below list the basic settings of the parameter sets for the ETU300 on delivery
from the factory.
ETU300 LSI, ETU300 LSIG
Protective function
L: Overload protection LT
Current setting I
r
Tripping time t at 6 x I
r r
L: Overload protection LT, neutral conductor
Current setting I
rN
S: Delayed short circuit protection ST
Current setting I
sd
Tripping time t
sd
I: Instantaneous short-circuit protection INST
Current setting I
i
Maintenance mode DAS+
Current setting I
i DAS+
Digital input / output
Digital ETU input
Digital ETU output
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
Basic setting
0.4 x I
n
0.75 s
1.0 x I
n
OFF (tripping ST switched off)
0.08 s with ST characteristic: I
1.5 x I
n
1.5 x I
n
Activate maintenance mode DAS+.
Maintenance mode DAS+
A
t
2
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