Product Description:

The 13.F0.R31-3429 is a variable-frequency control cabinet produced by KEB as part of the F0 Combivert Control Cabinets series. The assembly combines rectifier, DC link, and inverter stages so motor speed can be adjusted from a protected panel while the power electronics remain in one enclosure. This arrangement reduces the need to separate the conversion stages across multiple housings and keeps the main drive section grouped inside the cabinet. It is intended for industrial automation cells that require accurate torque regulation, reduced inrush current, and coordinated multi-axis control. The cabinet also connects to higher-level PLCs through standard field wiring without additional external enclosures.

This cabinet is designed for a 400 V supply and operates on a 3-phase network, which matches common low-voltage distribution systems in factories. Under nominal conditions, the inverter delivers 8.3 kVA of apparent power and a continuous output of 12 A to the connected motor group. Frequency synthesis extends up to 408 Hz, allowing operation of high-speed spindles beyond the base line frequency. A phase-to-ground insulation limit of 290 V supports protective grounding practices. The wiring terminals accept 2.5 mm² conductors, and upstream protection can be provided by a 20 A delayed-action fuse.

For transient acceleration demands, the drive can energize motors rated at 5.5 kW, and the output bridge switches at up to 4 kHz to reduce current ripple and audible noise. The higher switching rate can also support smoother current delivery in applications that are sensitive to vibration. Installation is permitted up to 3000 m above sea level, although output must be reduced above that height according to a 1% per 100 m derating curve. The housing carries an IP20 rating, so the cabinet should be mounted inside a clean, ventilated compartment. That placement helps protect internal components from accidental contact while allowing heat to dissipate through the surrounding enclosure space.