3VL4731-1MG36-0AA0 SIEMENS

The 3VL4731-1MG36-0AA0 is a 3-pole circuit breaker from Siemens, designed for line protection with a standard breaking capacity. It is part of the VL400N series, offering reliable performance in AC systems up to 415V. This circuit breaker features an Electronic Trip Unit ETU22, providing advanced protection and control capabilities. The ETU22 unit offers LSIG protection functions, including overload (L), short-circuit (S), instantaneous (I), and ground fault (G) protection. The rated current (In) is 315A, with an adjustable overload protection range (IR) from 128A to 315A. The short-circuit protection (ISD) can be set from 1.5 to 10 times the IR value, and the instantaneous short-circuit protection (II) is fixed at 11 times the In value. This model does not include an auxiliary release but is communication-capable, allowing for integration into monitoring and control systems. It also lacks auxiliary/alarm switches, focusing on core circuit protection functions. The breaker's breaking capacity (Icu) is 55kA at 415V AC, ensuring effective interruption of fault currents.