PPST 3kW, 5kW, 7.5kW Home » PPST 3kW, 5kW, 7.5kW Induction Heating Equipment PPST 3kW, 5KW, 7.5kW Power Rating These high-frequency units range in power rating from 3kW to 7.5kW, which are designed for 100% duty cycle for 24/7 operation.