The Siemens 3VM1150-4EE46-0AA2 is a 4-pole circuit breaker on the IEC frame 160 platform, rated for a breaking capacity class S with Icu=36kA at 415V. For selective coordination downstream, the short-circuit release is fixed at Ii=10 x In (500A), which helps keep upstream devices from tripping on a downstream fault, provided the upstream breaker's instantaneous threshold is set higher.
Overload and short-circuit protection settings
The TM220 thermal-magnetic trip unit gives an adjustable overload protection band Ir=35A...50A, letting you match the breaker to the actual continuous load current within that window. The magnetic short-circuit protection is fixed at Ii=10 x In (500A). Terminal connection type is assumed for panel wiring; verify lug range against your cable cross-section during commissioning.