3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
23
Description
2.1 Overview - applications and portfolio
2.1.1 Properties
The 3WA circuit breaker is the new generation of air circuit breakers in the Siemens AG
portfolio. It is based on the proven and robust design of its predecessor 3WL. The
technical data of the 3WA circuit breaker mechanics and the portfolio have been
extended as compared with 3WL, and the electronic components have been completely
redeveloped.
The 3WA circuit breaker is part of the product family of SENTRON protection, switching,
measuring and monitoring devices and covers applications in the rated current range
from 630 A to 6300 A.
• AC devices are available as circuit breakers and non-automatic circuit breakers. For
more information, see Chapter Circuit breakers and non-automatic circuit breakers
(Page 27).
• DC devices are only available as non-automatic circuit breakers.
The 3WA1 circuit breaker has the following properties:
• Three sizes:
– Size 1
AC with a rated current I
n
from 630 A to 2500 A
– Size 2
AC with a rated current I
n
from 2000 A to 4000 A
DC with a rated current I
n
from 1000 A to 4000 A
– Size 3
AC with a rated current I
n
from 4000 A to 6300 A
• ETU300 electronic trip unit:
– Functionally expandable with an exchangeable option plug
– Easy parameterization of the basic protective functions using rotary switches
• ETU600 electronic trip unit:
– Functionally expandable with an exchangeable option plug and digital function
packages
– Easy parameterization of the basic protective functions using rotary switches or via
four operating keys and a color display
– User-friendly parameter assignment or documentation of settings with the
SENTRON powerconfig configuration software via Bluetooth, the USB interface, or
a communications module
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