Product Description:

The 131F6658 is a variable frequency drive produced by Danfoss for the VLT FC 202 AQUA Drives series. It is used in municipal and industrial pumping stations to adjust motor speed in response to flow or level feedback. Controlled acceleration and deceleration help reduce water hammer, while speed regulation lowers electricity consumption when full pump output is unnecessary. By converting a fixed-frequency supply into a variable-frequency output, the drive provides the torque and speed control required by centrifugal pumps and fans. This operating method also allows automated systems to match equipment output more closely to changing process demand.

The enclosure has an IP20 chassis rating, so the drive must be mounted inside a cabinet that prevents accidental contact with internal components. It accepts a mains input of 380 to 480 VAC with three-phase power, allowing connection to common industrial electrical systems within that voltage range. The incoming supply is converted into a controlled output for regulating the connected motor. An integrated RFI filter attenuates conducted electrical noise and supports compliance with applicable electromagnetic compatibility requirements. A graphical local control panel displays operating values and parameters while providing controls for local setup, starting, and stopping. The housing also uses standard cable entries, which provide fixed routing points for power and control wiring. These entry locations help maintain orderly cable separation inside the surrounding cabinet and simplify access to the drive terminals.

The drive has no brake chopper, so regenerative energy created during motor deceleration must be limited through the selected stopping profile or handled by suitable external equipment. Deceleration settings should account for the inertia of the connected pump, fan, or mechanical load to avoid excessive DC-bus voltage during rapid stops. The unit uses uncoated printed-circuit boards, making installation in a clean, dry, humidity-controlled cabinet important for dependable operation. Appropriate cabinet filtration can reduce exposure to conductive dust, moisture, and other airborne contaminants that could collect on electronic components. The Series 202 identifier places the drive within the mechanical and control architecture used by the VLT AQUA Drive platform. Its accessory positions are not populated with preinstalled option cards, leaving the available interfaces open for compatible application-specific additions when required.