The Danfoss Water & Wastewater VLT®2800 Series Variable Frequency Drives are now available with enhanced sleep functionality, run-dry detections and pipe fill mode as standard. These new features provide improved pump operation and protection while increasing energy efficiency. When using pumps with flat pump curves or when suction pressure varies, enhance sleep functionality provides optimum control for shutting down the pump at low flows. Run-dry detection protects against damage pipe fill mode prevents water hammer.