3VL4731-1NF46-0AA0 SIEMENS

The 3VL4731-1NF46-0AA0 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. Equipped with an Electronic Trip Unit ETU20, this circuit breaker offers precise and adjustable protection characteristics. The ETU20 provides LSI (Long-time, Short-time, Instantaneous) protection functions, enhancing its adaptability to various load conditions. The rated current (In) is 315A, with an adjustable overload protection range (IR) from 128A to 315A. Short-circuit protection (ISD) can be configured from 1.5 to 10 times the IR value, while instantaneous short-circuit protection (II) is set at 11 times the In value. This model does not include N-pole protection and is without an auxiliary release. Furthermore, the ETU is communication-capable, allowing for integration into monitoring and control systems. Note that it does not include an auxiliary/alarm switch.