Select a variable frequency drive from the motor and driven-load duty, using output-current and overload requirements rather than power label alone. Match supply, control mode, communication and environmental conditions, then review motor, cable and protection compatibility with qualified designers. Compare the complete cabinet and integration scope. Acceptance should demonstrate representative machine behavior and agreed control functions. Include filters or reactors where specified, cooling, commissioning and parameter backups in the project budget.
Applications and production fit
Describe the driven process, required speed range and how its torque or load changes. A pump control job, conveyor and intermittent machine duty can call for different drive arrangements. Collect the motor nameplate and present control method before looking at a catalogue power size. Define the operational result sought, such as coordinated speed or pressure control, without assuming that fitting a drive automatically creates an energy-saving project.
Shown as a configuration reference. Availability and the equipment offered for your project are confirmed separately.
Configuration choices to compare
Compare the exact drive’s output-current and overload conditions with the motor and duty. Specify supply, control mode, braking requirements where relevant, inputs and outputs and communication with other controls. Review motor compatibility, cable length and any required accessory arrangements with qualified designers. A nominal motor-power label is a useful starting point but not a substitute for current, duty and installation assessment of the full drive system.
Utilities, layout and site compatibility
The cabinet review should include cooling, mounting, contamination, access, electrical protection and the actual supply conditions. Ask the designer to assess electromagnetic compatibility and any required filters, reactors or other equipment for the installation. State temperature and altitude so the offer can show applicable conditions. General drive features should not be assumed to establish compliance or acceptable behavior in every panel or destination application.
Delivered project cost and scope
Compare drive, enclosure, cooling, protection, control wiring, communication and commissioning as one scope. Identify filters, reactors, braking equipment and other accessories separately where specified. Ask for local support and replacement arrangements, including the parameter and firmware requirements of a spare. Energy estimates should use the actual load and control objective. A smaller drive purchase price can be misleading if important cabinet or integration items are excluded.
Representative acceptance testing
Agree a representative machine or process test with the responsible controls and electrical team. Verify the offered configuration, speed behavior, load response and specified communication or alarm functions under the approved procedure. Record parameters and operating conditions. A drive display showing the desired frequency does not establish the connected machine’s output, coordinated controls or process performance. Include the handover of backups and documentation in acceptance.
Maintenance and operating handover
Handover should provide parameter files, firmware identification, drawings and a clear support route. Define who is permitted to change settings and how modifications are recorded. Ask about cooling paths, fans, service intervals and storage or replacement instructions for the exact unit. If the motor, cable or driven process changes later, review the drive selection again rather than simply copying parameters from the previous arrangement.
OEM/ODM and project customization
Define customization as a separate scope in the quotation. Configuration choices concern the equipment arrangement and operating requirements; OEM requests can include permitted branding, labels, manuals and packaging; ODM requests may involve engineering changes. Identify the party responsible for design, documentation and verification before agreeing to a change. A manufacturer reference photograph demonstrates a category or model family and does not establish that IndustryApex represents that brand or can relabel its product. Ask which changes are feasible for the proposed supplier, what sample or drawing approval is needed and how the change affects service parts, testing and delivery.
RFQ checklist for a comparable proposal
Send a concise project brief with the specific items below and attach drawings, samples or site information where available. Distinguish essential requirements from preferences so alternative offers remain comparable. Ask each bidder to return a configuration list, utility and installation boundary, relevant model documentation, acceptance plan and an itemized quotation. State the destination and who will review applicable local requirements for the exact offered configuration. Identify exclusions, recurring consumables, training, warranty conditions and after-sales responsibilities before comparing totals. If important data is unavailable, mark it as an assumption to verify instead of allowing different bidders to silently solve different projects.
- Motor nameplate and driven-machine description
- Load and overload duty profile
- Required speed range and control objective
- Supply voltage, frequency and phase
- Output-current and proposed drive rating
- Control mode and braking requirements
- PLC communication and input-output list
- Motor cable length and installation route
- Cabinet temperature, dust and cooling
- Filters, reactors and protection responsibility
- Representative acceptance and parameter backup
- Destination, firmware and spare strategy
Manufacturer configuration references
Review the linked manufacturer information as configuration references. Request the current sheet, included scope and relevant evidence for the exact proposed equipment; these references do not establish an IndustryApex supply relationship.
- INVT GD200A general purpose variable frequency drives
- INVT official supporting product documentation
What should you include in your RFQ?
- Motor nameplate and driven-machine description
- Load and overload duty profile
- Required speed range and control objective
- Supply voltage, frequency and phase
- Output-current and proposed drive rating
- Control mode and braking requirements
- PLC communication and input-output list
- Motor cable length and installation route
- Cabinet temperature, dust and cooling
- Filters, reactors and protection responsibility
- Representative acceptance and parameter backup
- Destination, firmware and spare strategy
For OEM / ODM requests, include the branding, packaging, configuration or engineering changes you need, initial and annual quantities, target market, sample approval and acceptance requirements. Feasibility and commercial scope are confirmed for the specific project.
Need OEM / ODM customization?
Submit branding, packaging, configuration or engineering requirements for this equipment. Include the target market, initial and annual quantities, required changes and acceptance criteria.
Customization feasibility, permitted branding, development responsibilities, minimum quantity, cost and lead time are reviewed for the proposed supplier and configuration before a quotation is confirmed.
Frequently asked questions
Can a VFD be chosen only from motor kW?
No. Review motor current, load and overload duty, supply, environment and installation conditions. Request the exact drive rating under those conditions. A catalogue power label is not a complete drive-system selection method.
Will adding a VFD always save energy?
No universal saving should be assumed. Results depend on the driven process, existing control method and operating profile. Define the control objective and compare energy within an explicit project boundary using representative duty data.
Are filters or reactors always included with a drive?
No. Identify the exact offered accessories and have qualified designers review the installation requirements. Cabinet, supply, cable and compatibility conditions matter. A general product feature list does not establish the complete panel scope.
What should be delivered after VFD commissioning?
Keep exact model and firmware details, parameter backups, electrical and control drawings, test records and service instructions. Assign ownership of changes and a replacement strategy. A working display without the configuration records is an incomplete handover.
Can I request OEM or ODM customization for a variable frequency drive?
Yes, include the requested configuration, branding or engineering changes in your project inquiry. Feasibility, ownership of the design, validation, documentation, minimum quantities and delivery terms need confirmation with the proposed supplier. The referenced manufacturer model is an example, not an OEM commitment from that brand.
What information is needed to request a variable frequency drive quotation?
Send the category-specific checklist on this page, the destination, your operating conditions and available drawings or samples. Ask for an itemized complete project scope and a representative acceptance plan. Flag missing input data so quotations state the same assumptions rather than appearing comparable while covering different configurations.
Reference information
- INVT GD200A general purpose variable frequency drives
- INVT official supporting product documentation
Reference data and images explain equipment configurations. IndustryApex engineers confirm the offered model, specification and commercial scope in your project quotation.