What this contactor is and what the ratings mean
The Siemens 3RT1317-1AP00-ZX95 is a 4-pole contactor in the SIRIUS S00 frame, with 4 normally-open main poles and a 230 V AC 50 Hz coil. The AC-1 rating of 22 A is the resistive-load current it can make and break — that's the figure to use for heater banks, lighting, or transformer primary switching. For motor loads you'd derate to the AC-3 current, which for this frame size typically lands around 9 A at 400 V. The 14.5 kW at 400 V figure is the motor power it can handle in AC-3 duty, so it's sized for a 15 kW motor on a 400 V three-phase line.
Panel integration and wiring
The S00 frame snaps onto a 35 mm DIN rail per EN 60715. Screw terminals accept 0.5 to 4 mm² solid or stranded copper — strip length 8 mm, torque 0.8 to 1.2 Nm. The 4 NO main poles are wired as two independent contact paths; the coil terminals A1-A2 sit on the front face for easy daisy-chaining in a 230 V AC control circuit. Auxiliary contact blocks (3RH29 series) clip onto the front or side without increasing the DIN footprint.