Advantages - Siemens SENTRON 3WA1 Manual

Description
2.1 Overview - applications and portfolio
2.1.3

Advantages

• High modularity
In order to adapt the circuit breaker to new and changing requirements, components
such as auxiliary releases, motorized operating mechanisms, external current sensors,
auxiliary circuit signaling switches, automatic reset devices, and interlocks can be
retrofit or replaced.
• Quick functional expansion
The protective functions of the ETU600 electronic trip unit can be quickly adapted to
the requirements of the installation site:
– Ground-fault protection can be added by simply exchanging the option plug (LSIG
– Protection and alarm functions, but also graded metering functions, can be added
• Flexible communication/metering function
The communications modules of the 3WA circuit breaker offer the PROFINET IO,
Modbus TCP, and Modbus RTU communication protocols, which can be used
simultaneously. Furthermore, two communications modules with the same or
different protocols can be operated independently of each other on a circuit breaker,
for example in a redundancy system. The retrofittable modules can be mounted
directly on the circuit breaker to save space or flexibly and externally on a DIN rail.
The communications modules are updatable, they provide security functions to
protect against unauthorized access.
• Low inspection/maintenance effort
– Only inspection required
– No relubrication of moving parts in the circuit breaker
– Parts only need to be replaced during maintenance if this is deemed necessary
– Inspection and maintenance work may be carried out by qualified personnel of the
• Low space requirement
The 3WA13 circuit breakers (size 3) are extremely compact:
3-pole circuit breakers fit into an 800 mm wide control panel.
4-pole circuit breakers can be installed in a 1000 mm wide control panel.
26
version).
via digital function packages.
based on the inspection results. Accessory components are designed for the
maximum specified service life of the circuit breaker under normal operating
conditions.
operator or by a contracted company.
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06