ABB ACS310-03U-34A1-4 Inverter — 3-Phase 380-480V AC Drive, 34A / 15 kW

ABB · ACS310 · VFD / AC Drive · In stock for MRO

The ABB ACS310-03U-34A1-4 is a 3-phase 380-480 V general-purpose AC drive (VFD) from the ABB ACS310 pump-and-fan family, rated 34 A continuous output (about 15 kW / 20 HP at 400 V) in an IP21 / NEMA 1 wall-mount enclosure. It is widely used in water-treatment, HVAC, irrigation and industrial-fan retrofits where built-in PID, sensorless vector control and a Modbus RTU fieldbus matter more than high-end programming features. KOEED keeps the ACS310-03U-34A1-4 in active stock for fast MRO turn-around, and is the same one-stop multi-brand source used for Allen-Bradley PowerFlex 525 / 70 drives, Siemens Sinamics V20 / G120, Schneider Altivar 320 / 630 and Yaskawa V1000 / A1000 platforms.

Key Technical Specifications & Overview

The type-code breakdown is worth memorising on the floor: ACS310 = the pump / fan drive family; 03U = 3-phase 380-480 V input; 34A1 = 34 A nominal current; 4 = IP21 / NEMA 1 enclosure. So if you ever see an ACS310-03U-25A1-4 or ACS310-03U-46A1-4 in the same cabinet, the family and frame are identical and you can wire them up the same way — a useful detail when a spare drive has to come out of a different cubicle.

Application Scenarios & Where It Fits

The ACS310 was designed specifically for variable-torque loads (pumps, fans, blowers) and constant-torque loads that don't need a high-performance servo loop. Typical deployments include:

• Water and wastewater — raw-water intake pumps, transfer pumps in factory automation booster stations, dosing pumps, and sewage-treatment aerators.
• HVAC — chilled-water pumps, condenser-water pumps, supply / return fans, cooling-tower fans in commercial and light-industrial HVAC plants.
• Irrigation — centre-pivot and drip-irrigation pumps where 4-20 mA pressure feedback modulates speed.
• Process fans and blowers — combustion-air blowers, drying-line fans, bag-house exhaust fans in process control cells.
• Constant-torque retrofit — replacing across-the-line started conveyors or mixers where soft-start and adjustable speed are both wanted.

MRO teams that run mixed-brand cabinets are the typical buyer. The same plant might have Allen-Bradley ControlLogix supervising the line, a Siemens S7-1200 next to a Schneider Magelis HMI, and a few ACS310 drives on the pump skid. A Mitsubishi FX / iQ-R PLC, an Omron CP1 / CJ2, and a Yaskawa MP controller can all sit on the same RS-485 Modbus trunk — so the ACS310 doesn't lock you into any particular PLC brand.

Integration & Wiring Notes

Power terminals. 3-phase L1 / L2 / L3 in, U / V / W out to the motor. Earth / PE must be landed on the dedicated PE terminal before power-up, and the chassis must be bonded to the cabinet protective earth. Output side: do not add a contactor or a sine filter between the drive and the motor unless your cable run exceeds the manufacturer limit — extra capacitance on the output will trip over-current on the first ramp.

Control terminals. The default ACS310 macro exposes AI1 (4-20 mA or 0-10 V, jumper-selectable) as the speed reference, AI2 as the PID feedback, DI1 as start / stop, DI2 as run-reverse (or constant-torque direction), and RO1 / RO2 as fault and run relays. The Modbus RTU port is on terminals 29-30 (RS-485 A / B) and uses the standard 06 / 03 / 10 / 04 function codes. A typical poll cycle from a Siemens S7-1200 or a Mitsubishi FX5 is a few hundred milliseconds for 6-8 drive parameters — well within what a SCADA refresh needs. For deeper Modbus register mapping, the KOEED Modbus CRC Calculator helps you double-check the CRC byte order for the field.

Programming. ABB's Drive Composer entry tool (or the older DriveStudio) talks to the drive over the mini-USB on the Assistant panel, or over Modbus. Parameter sets for typical pump and fan applications are pre-loaded as macros, so most start-ups just pick a macro, enter motor nameplate data, run the ID-run, and you're done. For projects that also pull in Omron CP1H PLCs, a Fanuc CNC interface, a Panasonic FP-X PLC, or a Yaskawa Sigma-7 servo, the Modbus trunk can be shared — just keep each drive on its own node ID and terminate the bus with 120 Ω at both ends. For PID setpoint scaling, the KOEED PLC Hex to Float Converter is handy when you want to read floating-point feedback values from the drive.

Installation & Commissioning Tips

Mounting. Keep at least 100 mm clearance above and below the drive for airflow, and avoid putting other heat-generating devices (transformers, line reactors) directly underneath. The IP21 rating is good for indoor wall-mount in a control room, but it is not drip-proof — in a wet plant, drop it into a NEMA 3R or IP54 cabinet.

Cable practice. Use shielded symmetrical VFD cable (or 4-core + overall shield) on the motor side, ground the shield at both ends with 360° bonding, and keep motor cable runs short (under ~50 m is the practical limit on the 34 A frame). For longer runs, an output reactor or dU/dt filter is recommended. The control wiring should be routed in a separate trough from the power wiring to avoid noise on the analog signals.

Commissioning flow. Confirm the wiring is right, power up with the motor uncoupled (or with the load locked-out), enter motor nameplate data, run the ID-run, then reconnect the load. For pump applications, set the PID feedback source to AI2, set the PID setpoint source to a digital reference or a 4-20 mA master, and tune the PID with a step-response test on the actual piping. For fan applications, set a skip-frequency band to avoid resonant duct acoustics. Most field issues with the ACS310 come down to mis-sized input protection, missing PE bonds, or a sensorless-vector ID-run that wasn't completed — the KOEED AI Diagnostic Tool can read a fault code off the panel and suggest a fix path in a few seconds.

Procurement, Warranty & Lead Time

Because the ACS310 is now a legacy / mature platform, pricing and lead time on the ACS310-03U-34A1-4 are best confirmed by email. KOEED's standard flow is: send the part number (or a full BOM) to Moritta@KOEED.COM, get a quote back within 24 hours on business days, confirm the build, and ship worldwide via DHL / FedEx / UPS. For project buys, a multi-line Create a Quote form lets you bundle the ACS310 with the rest of the cabinet (PLCs, HMIs, breakers, contactors) into a single shipment.

Warranty. KOEED sources the ACS310-03U-34A1-4 through qualified channels — each unit is inspected, parameter-tested, and visually verified before it leaves the Shenzhen / Hong Kong warehouse, and ships with a standard 12-month warranty. We also handle the ACS310 to ACS580 / ACH580 / ACQ580 migration for new builds, so if you are upgrading a fleet of drives you can phase the old and new stock side by side. Cross-brand spares (a Schneider Altivar 320 next to an ACS310, or a Panasonic FP-X PLC in the same panel) can ride on the same BOM.

Lead time. For in-stock items the typical lead time is 3-5 business days to most major export hubs (EU, US, Middle East, Southeast Asia, South America) via DHL / FedEx. For larger BOM orders or pre-owned / refurbished units, expect a slightly longer window — the live status is reflected on our Real-Time Sales Records page. If a direct cross is not available, we will propose an equivalent ABB ACS580, ACH580 or ACQ580, or an equivalent from Yaskawa / Fanuc / KEYENCE — whatever keeps the line running. If the part isn't on the website, send the BOM to Moritta@KOEED.COM and we'll come back with a quote.

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