3VA2780-1AB30-4HH7 SIEMENS

The 3VA2780-1AB30-4HH7 is a draw-out molded case circuit breaker (MCCB) from Siemens, designed for robust circuit protection and control. It features a frame size of 1600 and comes equipped with a Real Time Clock (RTC) and four auxiliary trip alarm switches (S24) for enhanced monitoring capabilities. This 3-pole circuit breaker has a high interrupting capacity (Icu) of 55kA at 415V, making it suitable for demanding applications. The ETU320 electronic trip unit provides LI (Long-Time and Instantaneous) protection functions, with an adjustable rated current (In) of 800A via a rotary coding switch, and an adjustable Ir from 320 to 800A. The instantaneous tripping current (Ii) can be set from 1.5 to 15 times the rated current. It offers optional neutral conductor protection with adjustable settings and supports external current transformers (CTs) for up to 200% of the main contacts for draw-out versions. This model does not include communication capabilities or measurement functions. The motorized operating mechanism, designed for 220-250 V AC/DC, includes an S21 spring energy store signaling switch, along with electrical and mechanical trip indication. It is equipped with a switch-on solenoid (CC) operating at 220-240 V AC/DC, a second auxiliary release UVR for instantaneous undervoltage protection at 220-240 V AC/DC and a first auxiliary release ST Shunt trip release at 220-240 V AC/DC.