Transformer Procurement Guide

The public catalog currently lists an oil-immersed transformer product. Dry-type content here is a preparation guide, not a confirmed product offering.

Capacity and duty

State rated capacity in kVA or MVA, quantity per rating and the expected load profile. Attach any loading, expansion or overload requirements for engineering review.

Voltages, frequency and phase

Provide primary and secondary voltages, frequency and phase. Distinguish nominal system voltage from equipment requirements where the specification does so.

Connections and impedance

Provide the specified vector group, neutral arrangement and impedance, including the reference basis where available. Attach existing nameplate data if parallel operation or replacement is involved.

Tapping and cooling

Identify required tap range, tap steps and tap-changer type, if specified. State the cooling requirement and any restrictions on fans or auxiliary supplies.

Insulation and performance

Share specified insulation level / BIL, temperature rise, losses, efficiency and noise requirements with their measurement or acceptance basis. Attach the relevant technical schedule rather than selecting assumed values.

RFQ mapping: use the Transformer technical fields for ratings, connections, impedance, tapping, cooling, insulation and performance. Put duty details and unresolved requirements in Additional Technical Requirements.

RFQ mapping: Installation, Ambient Temperature, Altitude and Accessories / Special Environment. Use Additional Technical Requirements for layout and other site constraints.

Reference and edition

List each required standard number, relevant part and edition as stated in the specification. If IEC, IEEE/ANSI, GB or another family is named, attach the detailed clauses or schedule supplied by the project.

Local and owner requirements

Attach utility specifications, destination requirements and any project approval criteria. Identify who confirms applicability and resolves conflicting requirements.

Evidence and acceptance

State requested certificates, reports, inspections or witness points, their required issuer and acceptance criteria. Confirm availability and scope before treating any evidence as included.

Use Applicable Standard in the RFQ and attach the supporting specification. No standard applicability, certification or compliance result is established by this guide.

RFQ mapping: Accessories / Special Environment and Additional Technical Requirements. Identify required spares and whether they are separate line items.

Technical specification or tender schedule

Shows the required ratings, performance, standards and acceptance conditions. Mark unresolved clauses and proposed deviations separately.

Single-line diagram and load information

Shows the connection point, system arrangement and connected equipment. Include available load schedules and operating requirements.

BOQ or equipment schedule

Links each equipment tag to a description, rating and quantity. Keep different transformer configurations on separate lines.

Layout and interface drawings

Shows available space, installation dimensions, cable or busbar approach and mounting interfaces. Include drawing numbers, units and revision dates.

Existing-equipment records

For replacement or parallel-operation enquiries, include readable nameplate images, relevant drawings and site photos. A visual or nameplate match alone does not establish compatibility.

Submit these files in the existing RFQ Documents step. Identify each file’s purpose and revision; flag missing documents in Additional Technical Requirements.

Quantity

State units by equipment tag and configuration. Separate optional quantities, spares and any proposed delivery batches.

Destination Country / Port

Provide country and port where known, plus the final site location and access or unloading constraints when relevant.

Required Delivery / Target Date

Enter the requested date and explain whether it means dispatch, port arrival or site receipt. It is a planning input, not a confirmed lead time.

Preferred Incoterm

Provide the requested term, exact named place or port and intended rules edition. Flag packing, freight, insurance, clearance and unloading expectations for commercial review.

These headings match existing RFQ Requirement fields. Add batch schedules, date meaning and responsibility details under Additional Technical Requirements.

Capacity without application

Add the load description, operating duty and connection diagram.

Voltage without connection details

Add both winding voltages, frequency, phase and available connection or neutral requirements.

“Standard conditions” without site data

Provide location, temperature range, altitude and known environmental constraints.

A standard name without an edition

Attach the specified parts, editions and owner or utility requirements; flag unknowns.

Mixed quantities or conflicting files

Separate equipment tags and revisions, and identify the governing document.

A target date without a delivery basis

Explain the delivery milestone, destination and preferred commercial term.

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  Application is described

  Project purpose, duty and construction preference are identified.

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  Core ratings have sources

  Capacity, voltages, frequency and phase are recorded with units.

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  Site constraints are visible

  Installation, climate, access and enclosure requirements are gathered.

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  Requirements are traceable

  Standards, performance and acceptance inputs reference the project documents.

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  Interfaces are identified

  Connections, accessories, signals and auxiliary supplies are listed where specified.

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  Files are organized

  Available specifications, SLD, BOQ and drawings have revision references.

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  Commercial inputs are prepared

  Quantities, destination, target-date meaning and preferred trade term are stated.

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  Open points are explicit

  Unknowns are marked To Be Confirmed, with a responsible contact or source where known.