3VL3720-1TE46-0AA0 SIEMENS

The 3VL3720-1TE46-0AA0 is a robust 4-pole circuit breaker from Siemens, designed for reliable line protection in electrical systems. It is part of the VL250N series, indicating a standard breaking capacity suitable for various industrial and commercial applications. This circuit breaker is engineered to handle a rated current (In) of 200A, with adjustable overload protection (IR) ranging from 80A to 200A, providing flexibility in adapting to specific load requirements. The Electronic Trip Unit ETU20 incorporates advanced protection features, including LSI (Long-time, Short-time, Instantaneous) functions. Its standard breaking capacity (Icu) is rated at 55kA at 415V AC, ensuring effective interruption of fault currents. The short-circuit protection (ISD) is adjustable from 1.5 to 10 times the IR setting, while the instantaneous short-circuit protection (II) is set at 11 times the In. This model is configured with N unprotected, meaning the neutral conductor is not protected by the circuit breaker's tripping mechanism. It does not include an auxiliary release or auxiliary/alarm switch, simplifying its design for standard applications. This circuit breaker provides reliable and adjustable protection for electrical circuits, enhancing safety and preventing equipment damage.