AC01-T3-004G-B Variable Frequency Drive AC01 4.0 kW 3x380

AC01-T3-004G-B is the Veichi AC01 at 4.0 kW with three-phase 380 V supply (output 3x380) at 9.5 A. A rating for heavier machine-line units and small industrial pumps/fans. -B = built-in brake module.

Typical uses:

• A woodworking machine or a larger small-shop sawmill
• An industrial fan or pump up to 4 kW
• A conveyor, extruder or mixer on a machine line

Note: the T3 three-phase model is for a 380 V motor. If you need advanced logic or more than 7.5 kW, see the Veichi AC310.

Veichi AC01 — compact VFD with a built-in PLC for machine-building up to 7.5 kW

We reach for the AC01 where you need vector control and a bit of logic right on the drive, but have neither the cabinet width nor the budget for a full-size series. In a compact book-narrow body it runs V/F and sensorless vector (SVC), drives both asynchronous and PM (synchronous) motors, and on top of that carries a built-in simple PLC with 15 steps (the F14 group). If your machine turns at 0.4–7.5 kW and needs a straightforward step program, this is the workhorse for that job.

What sells it in the field: a built-in brake module (on the -B models you only add a resistor to stop a conveyor or spindle quickly) and standard Modbus RTU over RS485, so the drive joins the machine's line with no add-on card. An EMC filter is already inside, with an optional reinforced C3-level version.

What the AC01 is for

• Machine-building equipment: packaging and filling lines, textile and woodworking machines, car-wash systems — exactly where the maker positions the AC01.
• Single-phase 220 V mains: the S2 models run off single-phase 220 V and drive a 3-phase 220 V motor — workshops, farm lines and sites with no three-phase grid.
• Small pumps, fans and conveyors: vector holds torque at low speed better than a plain V/F drive, and the built-in PLC runs a simple cycle without an external controller.

How the AC01 differs from rivals

Honestly, if the machine needs more than 7.5 kW, a closed loop with an encoder, more complex logic or Profibus, go with the AC310. But for a typical 1–4 kW OEM unit running a simple cycle, the AC01 comes out cheaper and fits a narrower cabinet without giving up control quality.

When the AC01 is NOT the right choice

• You need advanced logic or a closed-loop encoder — see the Veichi AC310.
• Power above 7.5 kW — that is AC310 territory too.
• You need Profibus or Profinet — the AC01 confirms Modbus RTU over RS485 only; look at the AC310.
• A 380 V motor — the single-phase S2 models feed 220 V motors only; you need a three-phase T3 unit.
• A dusty or wet site — the enclosure is IP20, so it needs a cabinet.

Our experience with the AC01

Most often the AC01 is bought for machine-building, where cabinet width and cost per kilowatt matter. Two conversations come up most: whether single-phase 220 V will drive a motor (yes — the S2 models turn a 3-phase 220 V motor) and whether a separate brake module is needed (on the -B it is already inside, you only add a resistor). If you need a remote operator panel, take the -W models — they come with an external keypad. If you are unsure between S2 and T3, or between the AC01 and AC310, get in touch and we will size it to your motor and mains.