For three phase motors from 0.37 to 4 kW. Die cast aluminium IP65 case. Simple to operate (does not require programming). Voltage supplies: single phase 230V-50/60Hz (VFKB 24 and 27) three phase 400V-50/60Hz (VFKB 45 and 48). Motor kW selection jumper. Power on and drive status leds. Speed selection with potentiometer. ON/OFF switch. Run/Fault relay output contacts. Motor overload and shortcut protections. RFI/EMI level A filter.