3VL4740-1NB46-0AA0 SIEMENS

The 3VL4740-1NB46-0AA0 is a robust 4-pole circuit breaker from Siemens, designed for reliable line protection in electrical systems. It features a standard breaking capacity of Icu=55kA at 415V AC, ensuring effective interruption of fault currents. The trip unit is an ETU10, providing LI (Long-Time and Instantaneous) protection functions. The rated current (In) is 400A, with an adjustable overload protection range (IR) from 160A to 400A, allowing customization to specific load requirements. The short-circuit protection (II) is adjustable from 1.25 to 11 times the rated current (IN), offering precise control over short-circuit response. This circuit breaker is designed without an auxiliary release, simplifying the installation and maintenance process. Furthermore, the ETU is communication-capable, enabling integration into modern monitoring and control systems. However, it does not include an auxiliary/alarm switch as standard. This model is well-suited for applications requiring dependable circuit protection with adjustable parameters.