3VL4740-1NF46-0AA0 SIEMENS

The 3VL4740-1NF46-0AA0 is a robust 4-pole circuit breaker from Siemens, designed for reliable line protection in electrical systems. It features a standard breaking capacity (Icu) of 55kA at 415V AC, ensuring effective fault interruption. Equipped with an ETU20 trip unit, this circuit breaker offers comprehensive protection and control capabilities. 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 (ISD) can be configured from 1.5 to 10 times the IR setting, providing adaptable response to fault currents. Additionally, the instantaneous short-circuit protection (II) is set at 11 times the rated current (IN) for rapid clearing of high-level faults. This model does not include N-pole protection. Communication capabilities are available via an ETU, enabling remote monitoring and control. Auxiliary releases and auxiliary/alarm switches are not included in this configuration. This circuit breaker is well-suited for industrial and commercial applications where dependable circuit protection and adjustable settings are essential.