Product Description:

The FC301302 is an AC variable frequency drive manufactured by Danfoss for the VLT FC 301 Automation Drives series. The device sits between a three-phase supply and an induction motor, converting fixed line frequency into a variable waveform so controllers can adjust shaft speed to match process demand. In industrial automation, it is used on pumps, fans, and conveyors where electrical adjustment of flow or throughput lowers energy use and mechanical wear.

The control section tolerates digital command signals up to 28 V DC, allowing direct connection to 24-volt PLC outputs. When the inverter supplies its rated load, the displacement power factor has a value of >0.98, so supply components are not overstressed by reactive current. Control terminals accept conductors up to 1.5 mm² / 16 AWG, providing adequate capacity for shielded field wiring. Internally, the algorithm can raise the motor flux reference to 300 Hz, and the synthesized output frequency can reach 590 Hz for high-speed machinery. Unlimited output switching cycles do not reduce semiconductor life, and a true power factor of at least 0.9 is maintained under nominal conditions.

The power stage can apply up to 100% of the supply voltage to the motor terminals and will operate with phase imbalance limited to 3.0% of the rated supply voltage. Pulse-width modulation is generated at carrier frequencies as high as 110 kHz, supporting low current ripple and reduced acoustic noise. For cabinet installation, the unit is classified in overvoltage category III. The Safe Torque Off circuit draws 50 mA rms at 24 V. Relay output 1 is rated for 2 A at 240 V AC, and signal conductors as small as 0.25 mm² / 24 AWG may be used in the control terminals.