4 kW VFD: what motor do we ship it for
Our customers buy 4 kW units mostly for asynchronous 4 kW 380 V motors with Imax around 8.5-9 A. Typical use this year: machine tools, crushers, supply ventilation fans, conveyors. If the motor is rated at 5.5 A (220 V version), that is a different story; for it we ship a single-phase 220 V VFD, not this one.
First question we ask at the shop: what load. For a fan or pump (quadratic characteristic) the basic V/f series is enough. For a crusher or compressor with shock-load start we ship models that hold 150% overload for 60 seconds (HD mode). Veichi AC10-T3-4R0G-B holds 150% min per datasheet; INVT GD20-004G-4 the same number. For cranes and hoists we ship vector VFDs with encoder feedback, not these.
Which model we ship in 9 out of 10 cases
Three SKUs run through stock most often at 4 kW. Veichi AC10-T3-4R0G-B (budget, V/f, in Kyiv every day) for machine tools, pumps, fans. INVT GD20-004G-4 (mid-tier, scalar + simple sensorless vector) for conveyors and light compressors. Schneider ATV310HU40N4E when the customer asks for a European brand on the same job. Mitsubishi FR-D740-036SC-EC and Delta VFD055E43A we ship to order; not in daily stock. Please check availability before paying.
What else we ask before ordering. First: single-phase 220 V input or three-phase 380 V? 4 kW from a single 220 V phase is at the edge. We do keep these (Veichi AC10-S2-4R0G), but we recommend checking the breaker and cable. Second: does the kit include a braking resistor, because a high-inertia crusher without dynamic braking will trip on OU (overvoltage) at stop. 2-year warranty on all brands above, 1-3 day delivery from our Kyiv warehouse via Nova Poshta.
Manufacturers in our stock
- Veichi (AC10, AC70): budget, in stock daily
- INVT (GD20, GD200A): mid-tier, in stock
- Schneider Electric (ATV310, ATV320): European brand
- ABB (ACS150, ACS180, ACS480): premium, ship to order
- Delta Electronics (VFD-E, VFD-EL): Taiwan, to order
- Mitsubishi Electric (FR-D700, FR-E700): Japan, check availability
- Allen Bradley, Bosch Rexroth: rare SKUs, order only
| Model | Series | Supply | Output current | Application |
|---|---|---|---|---|
| Veichi AC10-T3-004G-B | AC10 | 3ph 380V | 9.5 A | Machine tools, pumps, fans |
| INVT GD20-004G-4 | GD20 | 3ph 380V | 9.5 A | Conveyors, light compressors |
| Schneider ATV310HU40N4E | Altivar 310 | 3ph 380V | 9.5 A | European brand, HVAC |
| Danfoss 132L6133 | Micro Drive FC51 | 3ph 380V | 9 A | Pumps, fans, EMC filter |
| Veichi AC01-S2-004G-B | AC01 | 1ph 220V | 16 A | Single-phase mains (at the limit) |
4 kW VFD manufacturers
- Veichi. AC01, AC10, AC70 series. Budget, in stock daily.
- INVT. GD20, GD200A series. Mid-range, in stock.
- Schneider Electric. Altivar 310, 320 series. European brand.
- Danfoss. Micro Drive FC51 series. Built-in EMC filter.
- ABB. ACS150, ACS180, ACS480 series. Premium.
4 kW VFDs by specification
- By supply: single-phase 220V | three-phase 380V
- By control type: vector | scalar
- By application: for pumps | for fans | for motors
- Adjacent ratings: 3 kW | 5.5 kW | 7.5 kW
Warranty and support
4 kW VFDs ship with an official manufacturer warranty of 18 to 24 months. Delivery across Ukraine — Kyiv, Kharkiv, Odesa, Dnipro, Lviv and other cities. Send a photo of the motor nameplate and our manager will match a compatible model and check availability.
