Kostal Inveor Ma VFDKostal Inveor Ma Series VFD. Wall or Motor Mounted options 1 phase AC Input Power 100Vac 15% to 230Vac +10% 50 60Hz + 6% input frequency 4 Sizes 4. 5 to 7. 3Amp. 150% Overload for 60 seconds Adjustable Carrier Frequency 4kHZ, 8kHz, 16kHz Output Frequency 0 to 400Hz. Main Power out cycle restart capacity 2 minutes. Protections Overvoltage, Undervoltage, I2T restrictions, short circuit, ground lead, motor & drive controller temp, stall prevention,