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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.
• DC devices are only available as non-automatic circuit breakers.
The 3WA circuit breaker has the following characteristics:
• Three sizes:
– Size 1 with a rated current I
– Size 2 with a rated current I
– Size 3 with a rated current I
• ETU600 electronic trip unit:
– Functionally expandable with an exchangeable option plug and digital function
– Easy parameterization of the basic protective functions using rotary switches or via
– User-friendly parameter assignment or documentation of settings with the SENTRON
• Wide range of versatile primary connectors
• Easy integration into power distribution equipment according to IEC 61439-2
• Replacement of the 3WL circuit breaker with minimum design and testing effort
• Optional expansion with a wide range of internal and external accessories
3WA Air Circuit Breakers
Equipment Manual, 05/2021, 92310000002-03
packages
four operating keys and a color display
powerconfig configuration software via Bluetooth, the USB interface, or a
communication module
from 630 A to 2500 A
n
from 2000 A to 4000 A
n
from 4000 A to 6300 A
n
2
21
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