Product Description:

The 131G8922 is a variable-frequency drive produced by Danfoss for the VLT FC 202 AQUA Drives series. The unit converts fixed-frequency plant power into an adjustable output that controls centrifugal pumps and blowers in water and wastewater systems. By modulating motor speed instead of mechanically throttling flow, it helps maintain precise pressure or level targets while reducing energy consumption and wear on valves, couplings, and other system components. This variable-speed control also allows pump output to respond efficiently as process demand changes throughout an operating cycle.

The drive supplies a continuous output of 30 kW, which corresponds to 40 HP at the motor terminals. It accepts utility power from 380–480 VAC through a three-phase power network, allowing direct connection to standard industrial feeders within that voltage range. The housing has an IP21 / Type 1 rating, providing protection against contact with internal components and vertically falling water droplets when the unit is installed indoors. The drive does not contain a brake chopper, so rapid deceleration must be managed by suitable external equipment or by using a controlled stopping profile. Its electrical characteristics support pump and blower applications that require continuous speed regulation under changing flow, pressure, or level conditions.

The control boards have a coated PCB finish that helps protect the electronics from moisture and airborne chemicals commonly present in pump rooms. Local setup and diagnostics are handled through the graphical local control panel, which presents operating parameters, status information, and alarms in readable text. Conducted emissions are reduced by an integral RFI filter, helping the installation meet applicable electromagnetic compatibility requirements when wiring and grounding practices are followed. Power and signal leads enter through standard cable entries, providing conventional routing points for installation inside an indoor electrical area. The absence of additional option modules leaves the standard terminal arrangement unobstructed and avoids unnecessary internal connections.