Reading the code — what FRN0520E2S-4C actually is
The FRN0520E2S-4C is a Fuji Electric FRENIC-Ace variable-frequency drive from the FRENIC series, sized for three-phase 400V supply in the 220 kW / 280 kW output class — code suffix E marks industrial / high-performance / multi-function positioning, suffix 4 confirms the 400V three-phase input, and the 0520 amperage-designation ties directly to that power bracket. At this rating the drive sits at the top of the FRENIC-Ace lineup, used where a single cabinet powers large pumps, fans, compressors, conveyors, or extruder motors — the IP20/IP00 basic enclosure means the unit is intended for a clean, panel-built enclosure, not a washdown or outdoor cabinet on its own.
Sizing and panel reality for a 220 kW-class drive
A 220 kW / 280 kW rating on three-phase 400V is the headline that decides motor fit — the drive handles any motor within that power band on the 400V mains, with headroom for short overload transients, but the line reactor, harmonic filter, and braking chopper (if retrofitted) must be spec'd against the same maximum current to keep upstream protection tight.