Product Description:

The 136H5583 is an AC variable frequency drive produced by Danfoss for the VLT FC 202 AQUA Drives series within the VLT AQUA Drive product group. As a dedicated motor controller, it adjusts output frequency and voltage to regulate centrifugal pumps and blowers in water and wastewater systems. Matching motor speed to real-time demand can reduce energy consumption during periods when full flow is unnecessary. Controlled acceleration and deceleration also help limit pressure surges that can place stress on piping, valves, and connected equipment. The drive supports variable-flow applications that require stable motor control across changing operating conditions.

It delivers a continuous mechanical output of 1.5 kW, equivalent to 2.0 HP. The input section accepts a supply range of 380 to 480 VAC, enabling direct connection to compatible industrial power systems without an autotransformer. The drive uses three-phase power, which distributes the electrical load across three supply lines. This arrangement is suitable for industrial pump and blower motors that operate from common three-phase mains. The converter regulates its output waveform to maintain useful motor torque when the application runs below nominal speed. This allows pump output to follow process demand instead of relying only on mechanical throttling. Appropriate upstream protection and external disconnect equipment must be selected for the installation because a mains option is not included.

Operator interaction is provided through a graphical local control panel, which offers menu access and displays operating data without requiring separate interface equipment. A coated printed circuit board helps protect the internal electronics from moisture and chemical contaminants commonly found near pumping systems. The built-in filter complies with RFI Class A1/B (C1) requirements to limit conducted electrical noise. The enclosure uses standard cable entries, allowing power, motor, and control wiring to enter through the intended connection points without a separate gland plate. No auxiliary option boards or adaptation modules are included in this configuration. The drive has no brake chopper, so regenerative energy produced during motor deceleration must be managed by suitable external system components. Installation clearances and airflow around the enclosure should be maintained to support dependable thermal performance during continuous operation.