Dual-Voltage Transformer RFQ: What to Specify

Specify each voltage explicitly

For a dual-primary-voltage transformer inquiry, list both requested primary voltages and the required secondary voltage. Include rated capacity, phase, frequency and quantity. A description such as “10/6 kV primary, 0.4 kV secondary” identifies the intended voltage options, but the final connection and switching arrangement still require design confirmation.

Explain how the unit will be used

Describe the application, network conditions and why two primary voltage options are required. Identify any destination utility requirements or buyer specification. Ask the supplier to review whether the requested arrangement is suitable for the selected capacity and operating conditions.

Approve the switching and connection documents

Agree the proposed method of selecting the primary voltage, the connection diagram, nameplate information and operating instructions before production. Do not assume that a voltage-change arrangement may be operated while energized. Only qualified personnel should carry out switching in accordance with the approved equipment instructions and project procedures.

Keep the quotation scope clear

Compare offers against the same voltage options, guaranteed particulars, accessories and required documents. Confirm any departures from the requested schedule in writing. Include available drawings when asking for a quotation and identify any details that remain undecided. The final design and supply scope must match the approved technical schedule rather than a general product title.