VFD or soft starter for a 15 kW pump?

If you only need to limit starting current and the pump runs at fixed speed, a 3RW40 (or equivalent) is cheaper and simpler. If the process needs pressure control, energy savings at part load, or you have a high-inertia start, specify a G120C / ATV630 / ACS580. Add line reactor and confirm cable length for EMC. Beglaz can quote both options on one RFQ.