AC10-T3-004G-B Variable Frequency Drive AC10 | 4 кВт 3ф/380

The AC frequency converter AC10 from Veichi model AC10-T3-004G-B is designed to provide stable control of electric motors with a nominal power of 4.0 kW. The device operates on a 3-ph/380 V power supply and also provides output in 3-ph/380 V, ensuring compatibility with existing electrical networks. With a built-in PLC, PID control system, and support for the ModBus RTU protocol, it offers precise regulation and easy integration into automation systems. Additional technical advantages include scalar control mode, vector control mode without an encoder, the presence of an EMC filter, and basic programmable panels KBD10-15 and KBD300-25. The device can be used to regulate the speed of motors in pumps, fans, and conveyor systems in manufacturing enterprises. It finds application in welding systems, thermal processing of materials, and other industrial processes where control accuracy is important. The converter provides effective management in energy-saving systems, where maintaining a stable load and uniform energy distribution is necessary. The equipment successfully integrates into automated production lines, ventilation systems, and speed control systems, contributing to increased efficiency and safety in the operation of equipment.

Veichi AC10 — compact VFD for pumps, fans and simple drives

AC10 is the smallest drive in the Veichi range. It covers 0.75 to 22 kW and fits in your palm (177×65 mm for the smaller models). We've supplied over 150 units in the last two years — most went to borehole pumps on private properties and small workshop fans.

The main advantage: it runs off a generator without tripping. A built-in kinetic buffer uses the motor's inertia during a voltage dip — the drive doesn't shut down, it just lowers the frequency for a fraction of a second. For farms and sites without a stable grid, that's critical.

What AC10 is good for

• Borehole pumps 0.75–2.2 kW (1ph/220V): the most popular use. Built-in PID holds pressure, sleep mode shuts the pump off once pressure is reached — saving energy and wear. Setup: VFD for a borehole pump.
• Exhaust fans 0.75–7.5 kW: scalar U/f mode, smooth jerk-free start.
• Packaging machines 0.75–4 kW: sensorless vector, 600 Hz max — suits high-speed spindles.
• Woodworking 2.2–7.5 kW: routers, edgebanders — the compact body saves cabinet space.

Comparison with alternatives

Parameter	Veichi AC10	Delta VFD-EL	INVT GD10
Power	0.75–22 kW	0.2–22 kW	0.4–15 kW
Max frequency	600 Hz	400 Hz	400 Hz
Sleep mode (PID)	Yes	No	No
Braking unit	Built-in	External	External

AC10 wins on two things: 600 Hz for high-speed motors and a built-in braking unit (external on Delta and INVT). But if you need CANopen or Profibus — none of AC10, GD10 or VFD-EL have them: then look at the AC310 with expansion cards.

AC10 parameters that save you on commissioning

• Reverse without swapping phases: direction changes in software via F07.05 (units digit = 1 to invert). No need to touch the terminal block. Step by step: motor reverse on Veichi.
• Start from terminals, not the keypad: F01.01=1 moves the RUN command to the control board terminals (then pick 2-/3-wire mode in F05.20), wire the Start button to COM. Remote control.
• External potentiometer: F11.30=1 switches the serial port to an external keypad with a potentiometer (RJ45). While the port is used for the potentiometer, Modbus over RS485 is temporarily unavailable — that's expected. How to connect a potentiometer.
• Auto-restart after a voltage dip: F07.06=1 (on AC10 the range is only 0~1), restart wait time is F07.07 = 0.00–60.00 s. On a generator it keeps the pump running without a manual restart. Auto-restart after E.Lu.
• Braking resistor: for frequent braking the resistance is chosen by power (for 1ph/220V: 0.75 kW ≈200 Ω, 1.5 kW ≈100 Ω, 2.2 kW ≈75 Ω) — this clears the DC-bus overvoltage (E.OU2 on deceleration). Choosing a braking resistor.

When AC10 is NOT the right choice

• Power above 22 kW — you need Veichi AC310 (up to 400 kW)
• Servo, precise positioning — you need a Veichi SD700 servo drive
• Crane, lift, heavy load — Veichi AC70 with STO
• Profibus/CANopen fieldbus — AC310 with expansion cards

Our experience

Motor auto-tuning (parameter F02.07) is probably the handiest feature. It saves about 15 minutes on every commissioning: the drive measures the winding parameters itself, so you don't have to find the nameplate and type values in by hand. On farms with old, undocumented motors that's a lifesaver. The rest of the typical settings are in one place: Veichi basic setup.