3VL3725-1NF46-0AA0 SIEMENS

The 3VL3725-1NF46-0AA0 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 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 requirements. The rated current (In) is 250A, while the overload protection (IR) can be adjusted from 100A to 250A, allowing for fine-tuning of the protection settings. The short-circuit protection (ISD) is adjustable from 1.5 to 10 times the IR setting, and the instantaneous short-circuit protection (II) is fixed at 11 times the In setting. This model does not include an auxiliary release but offers N-pole protection. Furthermore, the ETU is communication-capable, enabling integration into a network for remote monitoring and control. Note that this particular model does not include an auxiliary/alarm switch.