Lovato VLB30040A480 AC Drive 4 kW, 400-480 V, C2 EMC Filter

Lovato VLB30040A480 variable speed drive, 4 kW, 400-480 V

The Lovato VLB30040A480 is a three-phase variable speed drive for 400 to 480 V AC supplies with a rated output current of 9.5 A, equal to 4 kW at heavy load or 5 HP, and 7.5 HP at standard load. It has a built-in category C2 EMC filter, a brake chopper, RS485 Modbus-RTU and a multi-pump PID function. Seven Star LLC supplies the VLB30040A480 in Oman and the GCC as an independent supplier in Muscat.

The code gives the series VLB3, the power 0040 meaning 4.0 kW, and A480 for the 480 V class. The catalogue lists VLB30015A480, VLB30022A480, VLB30040A480, VLB30055A480 and others in the same series, so the number identifies the rating.

VLB30040A480 technical specifications

Heavy and standard load ratings for the VLB30040A480

The nameplate figure of 4 kW applies to heavy-load duty with 150 percent overload for 60 seconds, which suits conveyors, mixers and compressors. For standard-load duty, with lighter overload such as fans and centrifugal pumps, the same hardware is rated 7.5 HP. In practice, size the drive by motor current: 9.5 A for this unit, then check overload requirements. The 12.5 and 14 A input currents drop to 9 and 11 A with a mains choke, which also reduces harmonics.

Control modes and functions

Control modes include V/f linear and quadratic, multipoint V/f, sensorless vector, torque setpoint and closed-loop options with encoder feedback, which makes the drive flexible from simple fans to demanding hoists. Fifteen preset speeds, S-shaped ramps, slip compensation, flying restart, DC braking, a sequencer and a PID controller with sleep and rinse function are included, along with multi-pump control that runs one speed-regulated pump and two direct-start auxiliary pumps. A PTC probe input protects the motor, and the drive trips on overcurrent, short circuit, overvoltage, undervoltage, phase loss and motor overload.

Where the VLB30040A480 fits

The drive sits between the incoming supply, with fuses or a breaker such as the SM1P range upstream protection, and the motor. For hoists or fast decelerating loads, a braking resistor can be connected to the chopper. In multi-pump booster sets the drive plus two contactors, for example from the BF range, form a complete pressure control system.

VLB30040A480 selection and ordering checklist

• Motor nameplate current against 9.5 A and duty type
• Supply voltage 400 to 480 V three-phase
• Motor cable length against the EMC category needed
• Need for braking resistor, mains choke or STO option
• Control interface: analogue, digital or Modbus
• Ambient temperature and altitude derating

Installation and commissioning of the VLB30040A480

Mount vertically with clearance for airflow, and use shielded motor cable of limited length for the EMC class chosen. Enter the motor nameplate data, select the control mode and run the autotuning if applicable; the data sheet marks autotuning as not available, so set the motor parameters manually. Check the direction of rotation before coupling a load, and set ramps long enough to avoid overcurrent trips.

Typical VLB30040A480 applications in Oman and the GCC

Typical loads are chilled-water and booster pumps, ventilation fans, conveyors and mixers. At 4 kW the drive is IP20 and must be installed in a cabinet; in hot Gulf panels, derate above 45 °C.

Cable length, EMC and derating of the VLB30040A480

The built-in C2 filter is effective only with shielded motor cable up to 20 m according to the table; at 3 m the drive meets category C1, and at 35 m only category C3. Beyond 50 m of shielded cable, or 200 m unshielded, the drive requires an output filter, and the 100 m figure applies only below 40 °C ambient and 4 kHz switching. Where the motor is far from the drive, as on a borehole pump, plan an output reactor early in the design.

Temperature derating is 2.5 percent per degree above 45 °C at 2 or 4 kHz switching and above 40 °C at 8 or 16 kHz, so a lower carrier frequency is the first remedy in a hot panel, at the cost of more motor noise. Above 1000 m altitude the rated current drops by 5 percent per 1000 m. Check these curves for desert and mountain sites.

Information to send with an RFQ for the VLB30040A480

• Part number VLB30040A480 and quantity
• Motor kW, current and voltage
• Load type and overload requirement
• Control and communication interface
• Cable length and EMC requirement
• Delivery location

Site conditions in Oman for the VLB30040A480

Low-voltage switching and protection devices in Oman often sit in motor control centres and outdoor panels where internal temperatures are high for much of the year. When you select the VLB30040A480, check its rated values at your real ambient temperature, as stated in the manufacturer documentation, and confirm the coordination with upstream protection and with the motor or load it serves. Short-circuit levels differ from site to site, so verify the breaking capacity required at the point of installation.

Standardising ratings and coil voltages across a project reduces the number of spare part numbers that need to be stocked. Keeping a small stock of the VLB30040A480 and recording settings such as trip ranges or ramp times shortens repair work during a breakdown.

Documents and quotation

Send the part number VLB30040A480 and we will confirm the documents available for it, such as the technical data sheet, wiring diagram and instruction sheet, together with availability and lead time.

Seven Star LLC is an independent supplier in Muscat and is not an official channel of the manufacturer. Share the quantity, delivery location and project reference with the request and we will answer with a formal quotation.