The Siemens SIRIUS 3RV2411-1GA10 is a circuit breaker designed specifically for transformer protection. Its 100 kA breaking capacity at 400 V means it can safely interrupt very high fault currents without upstream devices needing to clear the fault — critical for transformer inrush events where a standard motor-protective breaker might nuisance trip. Trip Class 10 means it trips within 10 seconds at 7.2× rated current, matching transformer thermal damage curves. Phase failure detection is built in — no separate module needed for that protection function.
Mounting and integration
Screw and snap-on mounting onto 35 mm DIN rail per DIN EN 60715. 45 mm width takes one standard 45 mm module slot. Mounting position any — horizontal or vertical panel orientation works. Clearance: 50 mm above and below, 30 mm at the sides, 0 mm forward/backward. Screw-type terminals for main current circuit; accepts 2×(0.75–2.5 mm²) or 2×4 mm² solid/stranded. M3 terminal screws for main contacts.
Ratings and application
Rated operating voltage 20–690 V. Breaking capacity at 400 V is 100 kA; at 500 V also 100 kA; at 690 V it drops to 4 kA. These are the maximum prospective fault currents the breaker can safely interrupt at each voltage level — important for transformer secondary-side protection where available fault current can be high. Fuse coordination: at 400 V use gL/gG 50 A backup fuse; at 500 V use gL/gG 40 A; at 690 V use gL/gG 35 A. Maximum switching frequency 15 operations per hour under AC-3 duty. Ambient temperature range during operation -20 to +60 °C; storage and transport -50 to +80 °C.