3WL air circuit breaker

Why 3WL air circuit breakers?

Reliable, versatile and fully integrated: Every power source needs a reliable power supply. The 3WL air circuit breaker reliably protects electrical installations from damage or fire caused by short circuits, ground faults or overload faults.

The 3WL air circuit breaker can disconnect and protect motors, capacitors, generators, transformers, busbars and cables. In electrical systems used in industrial, building and infrastructure applications, it can be used as an incoming line, bus tie and feeder circuit breaker. It also features communication capabilities, allowing for easy integration into higher-level control and energy management systems.

Key benefits

Adapt to various applications

Featuring a modular design and standardized accessories, this circuit breaker can flexibly adapt to different application requirements. A globally compatible version compliant with UL 489 is available.

Easily implement functions

Easily implement protection, measurement and communication functions, such as rated current inserts that allow for rapid adjustment of the rated current. Expandable locking devices or mechanisms prevent accidental tripping.

Integrate with other systems

When equipped with a communication module and integrated into a higher-level energy management system, auxiliary, signal and position contacts report system status and fault diagnosis to the control system, even remotely.

Featured capabilities

The four sizes of the Siemens 3WL air circuit breaker.

Modular design

The 3WL air circuit breaker is available in four sizes, each including 3-pole and 4-pole options, with rated currents ranging from 630 A to 6300 A. Its modular design offers high flexibility, facilitating assembly and adjustment.

A person's hand holds Siemens SENTRON measuring devices.

Communication support

The compatible COM35 communication module supports PROFINET IO and Modbus TCP protocols. This makes this circuit breaker particularly suitable for the retrofitting and expansion of power distribution systems.

Powerconfig software

With Powerconfig, you can parameterize, record, operate and monitor 3WL air circuit breakers and 3VA molded case circuit breakers, as well as 7KT/7KM PAC devices with expansion modules, using various communication interfaces.