Motor protection breaker with ETU860M LSIG trip unit
The Siemens 3VA2220-5MQ32-0AJ0 is a 3-pole IEC frame 250 circuit breaker rated for motor protection, fitted with an ETU860M electronic trip unit providing LSIG protection — long-time (overload), short-time, instantaneous, and ground-fault. The In rating is 200 A, with overload protection adjustable from 80 A to 200 A. Short-circuit protection Isd ranges 1.2–15× In, instantaneous Ii 3–15× In, and ground-fault Ig 0.2–1× In with a time delay tg of 0.05–0.8 s. Breaking capacity is Icu=55 kA at 415 V, class M.
Integration notes
The breaker ships with two auxiliary switch changeover contacts (H) and one trip alarm switch changeover, plus a nut keeper kit. Mounts in standard IEC switchgear panels; the ETU860M allows field-adjustable LSIG curves, making it suitable for motor control centers where selectivity and ground-fault coordination are required.