3VL4731-3ME36-0AA0 SIEMENS

The 3VL4731-3ME36-0AA0 is a high-performance circuit breaker from Siemens, designed for line protection in electrical systems. This 3-pole circuit breaker is part of the VL400L series, known for its very high breaking capacity, ensuring reliable protection against overcurrents and short circuits. It boasts an Icu (ultimate breaking capacity) of 100kA at 415V AC, making it suitable for demanding applications. The breaker features an Electronic Trip Unit ETU20, providing advanced protection and control capabilities. The ETU20 offers LSI (Long-time, Short-time, Instantaneous) protection functions, allowing for precise adjustment of protection parameters. The In (rated current) is 315A, with an adjustable IR (overload protection) range of 128...315A. The ISD setting provides short-circuit protection with an adjustable range of 1.5 to 10 times the IR value. Additionally, the II setting offers instantaneous short-circuit protection at 11 times the IN value. This circuit breaker is communication-capable via ETU, enabling remote monitoring and control, but does not include an auxiliary/alarm switch.