AC310-T3-250G/280P-L Variable Frequency Drive AC310 | 250кВт / 280кВт 3ф/380

The Veichi AC310-T3-250G/280P-L frequency converter is a high-precision device with a rated power of 250 kW and a second power mode of 280 kW for three-phase supply of 380 V. The device operates at a rated current of 470 A, which increases to 510 A in the boosted mode, ensuring the stability of the electrical system. It supports scalar control mode, vector mode with encoder and without encoder, and implements linear U/f and quadratic U/f² laws that optimize the operation of the equipment. Built-in PLC and PID, as well as the presence of a remote control terminal along with the ability to integrate via ModBus RTU, CANopen, PROFIBUS DP, and Ethernet IP protocols enhance the functionality of the device. The device can be used to control electric motors on production lines, in pump equipment systems, and cooling systems. It is effectively applied in the automation of processes in high-tech manufacturing complexes where precision in speed regulation is crucial. The product has found its place in energy, transport hubs, and monitoring systems for industrial equipment, ensuring uninterrupted operations. Additionally, the frequency converter can be adapted to the requirements of infrastructure construction and logistics systems, demonstrating significant versatility across various industries.

Veichi AC310 — universal vector VFD for pumps, ventilation, conveyors and machine tools

We call the AC310 the all-rounder of the Veichi range, and that is from field practice, not a slogan. The series runs full vector control (scalar, sensorless vector and closed-loop with encoder), drives both asynchronous and synchronous motors, and is the one we reach for when plain V/f is not enough. If you need to hold torque, pressure or tension rather than just spin a shaft, this is the line.

Its headline feature is a built-in simple PLC (up to 16 steps) plus a PID controller. On a pump station that means the drive holds pressure on its own, with no separate controller. Modbus RTU is standard for an out-of-the-box SCADA tie-in, while Profibus, CANopen and Profinet are optional on the three-phase models.

What the AC310 is for

• Pumps and fans: built-in PID holds pressure/flow, with dedicated pump-and-fan load parameters.
• Single-phase 220 V mains: the T/S2 models run off single-phase 220 V and drive a 3-phase 220 V motor — farms, wells and workshops with no three-phase grid.
• Conveyors, mixers, machine tools: vector torque at low speed where a V/f drive sags.
• Large pump and traction sets: three-phase frames up to hundreds of kW with dual G/P rating.

How the AC310 differs from rivals

Parameter	Veichi AC310	Danfoss FC51	Delta MS300
Built-in PLC	Yes (16 steps)	No	Basic logic
Vector control	Sensorless / encoder	V/f class	Sensorless
Single-phase 220 V input	T/S2 line	Limited	Up to 2.2 kW
Fieldbus	Modbus + options	Modbus	Modbus + options

Honestly, for a simple set-and-forget fan there is no point paying for vector. But the moment you need logic, torque or a SCADA link, the AC310 works out cheaper than a basic drive plus an external controller.

When the AC310 is NOT the right choice

• A simple low-power pump or fan on a budget — the compact Veichi AC10 is cheaper.
• A 380 V motor — the single-phase T/S2 models feed 220 V motors only; you need a three-phase T3 unit.
• Dusty or wet sites — the enclosure is IP20, so it needs a cabinet.

Our experience with the AC310

This is one of our core Veichi series, with steady demand on water utilities and industrial ventilation. Two questions come up most: whether single-phase 220 V will drive a 3-phase motor (yes — that is exactly what the T/S2 models are for) and whether a pump needs a separate PLC (usually not — the built-in PID is enough). If you are unsure whether to pick a G or P frame, get in touch and we will size it to your load.