3VA2780-2AC03-4HH0 SIEMENS

The 3VA2780-2AC03-4HH0 Siemens is a robust, fixed-mounted molded case circuit breaker designed for frame 1600 systems. It features a real-time clock (RTC) and a 4AUX trip alarm switch S24 for enhanced monitoring and control. This 3-pole circuit breaker boasts a high breaking capacity "H" with an Icu of 85kA at 415V, ensuring reliable protection against short circuits. Equipped with an ETU350 electronic trip unit, it offers LSI (Long-Short-Instantaneous) protection functions. The In=800A rotary coding switch allows for adjustable rated current Ir from 320 to 800A. Short-delay tripping current Isd can be set from 1 to 10 times In, while instantaneous tripping current Ii ranges from 1.5 to 15 times In. It provides optional adjustable N conductor protection with external CT support up to 200%. The breaker includes a nut keeper kit but lacks communication connectivity and measurement functions. A motorized operating mechanism (220...250 V AC/DC) with an S21 spring energy store signaling switch is integrated, along with electrical and mechanical tripping capabilities, and a switch-on solenoid (CC) 220-240 V AC/DC with a 2nd auxiliary release UVR, instant Undervoltage 220-240 V AC/DC without 1st auxiliary release.