630A motor protection breaker with ETU350M LSI trip unit
The Siemens 3VA2563-5MN32-0CL0 is a 3-pole IEC frame 1000 circuit breaker in breaking capacity class M, rated Icu=55kA at 415V. It is configured for motor protection with an ETU350M electronic trip unit (LSI curve), an In=630A rating, and an overload protection range Ir=250A...630A. Short-circuit protection is set Isd=3...15 x Ir, with instantaneous pickup Ii=15 x In.
For motor protection, the ETU350M LSI trip unit provides adjustable long-time (Ir), short-time (Isd), and instantaneous (Ii) protection curves, letting you dial in the motor's full-load current and start-up inrush. The UVR (120-127V AC) drops the breaker on loss of control voltage, a standard requirement for emergency-stop circuits and undervoltage coordination.