Motor protection circuit breaker, Class 10, 100 kA at 400 V
The Siemens 3RV2011-1JA10-ZW97 is a SIRIUS motor protection circuit breaker designed for motor protection, with a Trip Class 10 rating and a breaking capacity of 100 kA at 400 V rated value. Class 10 trip means the overload relay will open within 10 seconds at 600% of the set current, which protects standard induction motors during locked-rotor conditions without nuisance tripping on normal starting inrush. The 100 kA breaking capacity at 400 V ensures the device can safely interrupt fault currents up to that level without upstream cascading, per IEC 60947-2 requirements for motor protection.
Mounting and panel integration
Mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715, with a width of 45 mm and depth of 97 mm, fitting standard motor control center (MCC) or panel layouts. Mounting position is any orientation, and the required clearances are 50 mm upward, 50 mm downward, 30 mm at the side, and 0 mm forward/backward — useful when packing breakers tightly in a panel. Screw-type terminals on the main current circuit accept 2x (0.75 to 2.5 mm²) solid or stranded, or 2x 4 mm², with M3 screws for the main contacts.
Breaking capacity and selectivity
Breaking capacity varies by voltage: 100 kA at 240 V, 100 kA at 400 V, 42 kA at 500 V, and 4 kA at 690 V — the 400 V figure is the one most often used for 400 V three-phase motor circuits in European panels. Phase failure detection is included, which is essential for preventing single-phasing damage on three-phase motors. Maximum switching frequency at AC-3 duty is 15 operations per hour, adequate for most pump, fan, and conveyor applications but not for high-cycling loads like stamping presses.