Motor Protection Circuit Breaker, Trip Class 10 — SIRIUS 3RV2011-1KA10-ZW96
The Siemens 3RV2011-1KA10-ZW96 is a SIRIUS-brand motor protection circuit breaker with Trip Class 10. Rated operating voltage spans 20... 690 V, with a breaking capacity of 100 kA at 400 V and 42 kA at 500 V. Back-up fuse coordination is specified: gL/gG 63 A at 400 V, 50 A at 500 V, and 40 A at 690 V. These are the maximum upstream fuse ratings that preserve the breaker's interrupting capacity under short-circuit conditions. Ground fault detection is not included, so a separate ground-fault relay or RCD is needed if that function is required.
Mounting position is any orientation. Clearance distances: 50 mm upwards and downwards, 30 mm at the sides, 0 mm forwards and backwards. These are the minimum air gaps to adjacent metalwork or other devices for proper arc quenching and heat dissipation. Main circuit terminals accept 2×(0.75... 2.5 mm²) solid or stranded, or 2×4 mm². Screw size is M3 for the main contacts. Dimensions: 97 mm depth, 45 mm width, 97 mm height. The compact footprint leaves room for additional devices in the same row.
Operating Conditions and Switching Duty
Maximum switching frequency is 15 operations per hour under AC-3 (motor starting) duty, and the same under AC-3e (enhanced motor protection) duty. This limits the breaker to applications with infrequent starts — not suitable for high-cycle jogging or reversing service. Motor horsepower ratings: 2 hp at 230 V, 3 hp at 200/208 V and 220/230 V, 8 hp at 460/480 V, and 0.5 hp at 110/120 V. These are the maximum motor sizes the breaker can protect at those voltages.