Sourced and supplied across Saudi Arabia
A drive is sized by the load curve, not by the motor nameplate, and the distinction decides whether the installation works. A pump or a fan is a variable torque load whose demand falls away sharply as speed drops, and that is where a drive saves real money. A conveyor, a mixer, an extruder or a positive displacement pump is a constant torque load that needs full torque at low speed, which requires a larger drive and often forced ventilation on the motor, because a motor cooled by its own shaft fan stops cooling itself when it slows down. Two further items belong in the enquiry rather than in commissioning. The cable run from drive to motor determines whether reflected wave voltage will stress the motor insulation, so long runs need output filters. And the drive is a harmonic source: on a weak supply or where many drives share a transformer, the mitigation is part of the design.
The more of this you send, the closer the first quotation lands.
| Motor rating | kW, full load current, voltage and rated speed from the nameplate |
|---|---|
| Load type | Variable torque such as pump or fan, or constant torque |
| Speed range | Minimum and maximum, and the torque needed at minimum |
| Motor cooling at low speed | State if forced ventilation is fitted or required |
| Overload requirement | Percentage and duration the drive must sustain |
| Supply voltage and frequency | 230/400 V at 60 Hz for the Saudi system |
| Cable length to motor | Long runs need output filters against reflected wave stress |
| Harmonic mitigation | Line reactor, DC choke, or active front end where required |
| Braking | Dynamic braking resistor or regenerative unit for overhauling loads |
| Enclosure and ambient | IP rating and the temperature inside the panel, not the room |
| Control and comms | Analogue reference, digital inputs, or a fieldbus protocol |
| Safety function | State if Safe Torque Off is required by the machine assessment |
| Bypass | State if a contactor bypass to direct on line is required |
Select one and it travels with your enquiry. Not sure? Leave it and describe the application instead.
We source to specification. Send your requirement and we will come back with options, lead time and pricing.