variable speed drive quote coordination
Requirements, factory inquiries and quote comparison for a variable speed drive. Two prices mean the same thing only when voltage, overload class and included accessories share one written basis.
Variable Frequency Drive Sourcing restates your electrical duty, approaches factories that build that class of inverter, and lines replies up on one basis. We are not the manufacturer and we do not choose the supplier for you. EMC filters, braking resistors, fieldbus cards, keypad kits and motor cable are either inside the quoted price or billed separately; that split must be written, not assumed.
Input supply voltage and phase decide whether an offer is usable at all. A 200–240 V single-phase input chassis cannot be treated as a 380–480 V three-phase chassis by changing a parameter. Frequency in Hz belongs on the same line. If a factory proposes an alternative variable speed drive, compare overload class, output current in A, enclosure, I/O map and cable length limit against the approved brief before you accept the substitution.
Responsibility for a variable speed drive RFQ
Every variable speed drive quotation should state input voltage, phase, frequency, output current, motor power as kW and HP, overload class, enclosure and which accessories ride with the chassis. A general capability letter is not evidence for the offered model. Evidence that belongs with each reply includes the datasheet for that configuration, listing files named to the model, and packing or EMC scope.
| Task | Our role | Your role |
|---|---|---|
| Specification | Restate supply, motor current and interface gaps | Approve the final spec |
| Supplier selection | Shortlist and compare on one basis | Choose the supplier |
| Quality checks | Coordinate agreed document and inspection points | Accept the shipment decision |
| Compliance | Collect stated files from the named plant | Confirm destination requirements |
Coordination stages
1 Requirement
We restate your electrical duty in writing: voltage, phase, Hz, motor A, overload and control I/O.
2 Supplier search
We identify factories that publish that construction, not a neighbouring starter or inverter family.
3 Quote comparison
We line up offers on rating, included cards, cable notes, packing and requested delivery terms.
4 Order follow-up
We track agreed checks before shipment. You still approve the commercial terms.
Optional budget should name currency and whether the figure is per chassis or for the whole order. Premium, mid-range, budget-friendly or undecided is a buyer preference, not a factory audit. No existing quotation is required to start. Continue with option forms, pump applications or the inquiry form.
High carrier frequency versus conservative thermal margin is a buyer choice on ambient, altitude and cabinet airflow. A compact high-output offer can look cheaper until the plant states the derating curve. We record that question; we do not certify the thermal margin. Site installation, motor commissioning and PLC programming stay with your contractors and the authority having jurisdiction.
Send a variable speed drive brief on one basis
Include supply voltage, motor current, quantity, destination and which accessories belong inside the price so factory totals can be compared.