Product Description:

The 131B9006 is an AC variable-frequency drive produced by Danfoss for the VLT FC 202 AQUA Drives series. The unit regulates pump and blower speed in water-supply and wastewater facilities by adjusting motor output in response to changing flow requirements. This variable-speed operation can reduce unnecessary energy consumption when equipment does not need to run at full capacity. The drive is suitable for applications such as centrifugal pumps, positive-displacement pumps, aeration blowers, and other motor-driven equipment used in water treatment systems.

The inverter delivers 15 kW of continuous output power, equivalent to 20 HP, for medium-sized pumping and ventilation equipment. It accepts line supplies from 380–480 VAC through a three-phase power network, making it compatible with common industrial electrical systems. Its IP21 / Type 1 enclosure protects internal components against accidental contact and vertically dripping water when the unit is installed indoors. Standard cable entries simplify conduit routing and provide practical access for the incoming supply, motor conductors, and control wiring. No additional cabinet adaptation is required for the standard installation arrangement. The FC 202 platform supports motor-speed regulation based on process commands, allowing the drive to respond to pressure, level, or flow control signals supplied by an external automation system.

Electromagnetic interference is reduced by an integrated RFI filter, which limits conducted noise entering the connected power network. The control electronics use coated PCBs for added resistance to moisture, airborne contaminants, and chemical exposure in pump-room environments. Local setup and diagnostics are performed through a detachable graphical local control panel, which provides readable parameter names, operating values, alarms, and status information without requiring a separate programming device. The design includes the absence of a brake chopper, so the drive cannot route regenerated energy to a braking resistor through an internal switching circuit. Applications requiring rapid regenerative deceleration must use an external braking arrangement, while systems with less demanding stopping requirements can use a controlled ramp or natural coast-down. The coated electronics and filtered input help the drive operate reliably in industrial water-handling installations where electrical noise and moderate atmospheric contamination may be present.