There are 4 second and 10 second ratings in the literature.
A 10hp phase perfect is rated for something like 150 amps 3 phase output for 3 or 4 seconds, which is what you need to start a 10hp motor (230v)
Since 2019 (I believe), rather than specifying a current for a fixed period, we include a series of overcurrent/motor starting sourcing limit charts in the Phase Perfect manual. These are a more accurate representation and show the curve of current over time a Phase Perfect can supply. These emulate a Class 10 trip curve.
PT's need large IGBT's compared to a similar sized VFD to handle the locked rotor current draw that comes with starting a motor "across-the-line". Then, we reign it in to stay inside the thermal design envelope.
You typically wouldn't need 150 A for several
seconds to start a 10 horse, but you might if it has 180psi of air pushing back against a piston pump hooked up to it, or similar. That's what we design around, the tough industrial loads, such as compressors, elevators (hydraulic pumps), etc., which makes it easy to say -- yes, the 10 Horsepower PT or PTE will start your 10 horsepower motor.
Charts for other models are available in the Phase Perfect Manual in the downloads section of our website. https://www.phasetechnologies.com/support/downloads