Product Description:

The FC-202P11KT2131H2531 variable frequency drive is part of the VLT FC 202 AQUA Drives series produced by Danfoss. This AC inverter regulates the speed of centrifugal pumps and aeration fans in automated water-handling systems by matching motor output to changing flow or pressure demands. It adjusts the output frequency instead of relying on mechanical throttling, which can reduce unnecessary energy consumption during periods of lower demand. The controlled output also helps stabilize pumping and aeration processes that require consistent pressure, flow, or dissolved oxygen levels.

The drive has a continuous electrical capacity of 11 kW, which corresponds to a mechanical output of 15 HP. The input rectifier accepts a mains supply of 200–240 VAC, allowing the unit to connect directly to compatible low-voltage feeders commonly used in municipal water facilities. It operates with three-phase power, maintaining balanced current draw across the incoming phases. The available output capacity supports pumps and fans that must run continuously without thermal derating under the stated operating conditions. Its enclosure and mechanical footprint also allow the drive to be arranged with other compatible power ratings in a shared control panel.

Electromagnetic compatibility is supported by a built-in RFI filter, which attenuates conducted electrical noise and permits installation near sensitive control instrumentation. The drive includes quadratic-torque application macros for pump and fan loads whose torque demand changes with speed. Integrated soft-fill routines allow piping systems to be pressurized gradually, reducing the risk of sudden pressure changes when a pump starts. Dry-pump protection can stop operation when the connected pump runs without sufficient liquid, helping prevent damage to seals and other internal components. These control functions operate within the drive, reducing the need for separate external programming to perform common water-handling tasks.