Fuji Electric FRENIC-AQUA AQ1 Pump Variable Frequency Drive

The Fuji Electric FRENIC-AQUA AQ1 is a three-phase 380 to 480 V variable frequency drive developed for water supply, wastewater and other pumping duties. One platform covers standard motors from 0.75 kW up to 710 kW, so a plant can keep the same keypad, parameter structure and spare-parts logic from a small booster set to a large lift station.

Pump control functions in a compact drive

Fuji positions the AQ1 as its first compact three-phase drive designed specifically for water supply and wastewater treatment. The page and datasheet list typical uses such as potable-water supply, constant-flow and tankless booster sets, submersible and well pumps, sludge and cooling-water pumps, irrigation, and general pump or fan loads. Control is by V/f with slip compensation or dynamic torque vector control, with 16 preset speeds, acceleration and deceleration times from 0 to 3,600 s, and analog speed references of 0 to 10 V or 4 to 20 mA.

A DC reactor is built in for the whole range (standard accessory on the largest frames), which limits input harmonics in line with IEC/EN 61000-3-2 and 61000-3-12. The datasheet lists category C2 emissions for the smaller ratings and category C3 for the largest ones. BACnet MS/TP, Modbus RTU and Metasys N2 are fitted as standard, and optional cards add PROFIBUS-DP, DeviceNet, CANopen, CC-Link, LONWORKS and Ethernet communication, a Pt100 temperature input, an analog interface and relay outputs.

Technical specifications

Ratings by motor size

Values below are taken from the Fuji Electric datasheet for the 400 V series. Select by rated output current against the motor nameplate current, not by kW alone.

Selecting and installing the AQ1

Confirm the pump type and duty first. Centrifugal pumps on a quadratic torque curve suit the 110 % overload rating, while positive-displacement or heavily loaded pumps need a current check against the table above. Choose IP21 or IP55 up to 90 kW depending on whether the drive sits in a panel or on the plant wall, and plan cabinet ventilation for the IP00 frames from 110 kW. Check the supply voltage, cable length to the motor, required communication card and any Pt100 or relay card before ordering. Option cards and braking resistors are ordered separately. For a comparison with another drive family, see the WEG CFW11 variable speed drive on our site, or browse all AC drives.

Documents and quotation

The datasheet attached to this page is Fuji Electric’s specification sheet for the FRENIC-AQUA AQ1 400 V series. Send us the motor kW and current, supply voltage, enclosure and fieldbus requirement, and we will prepare a quotation for the exact type code. Availability and lead time are confirmed per request.