Datasheet and ratings
Identify the proposed model and the electrical ratings that the document must cover.
Request for your projectHEAKOR / Buyer knowledge
Transformer buying,
made clearer.
Practical transformer buying guides for the decisions before a purchase.
Prepare the specification, check document scope and compare proposals on the same basis.
Choose your next task
What are you working on?
01 ↗
Choose a product family
Compare the main transformer arrangements.
02 ↗Prepare your specification
Collect the electrical, site and supply requirements.
03 ↗Send a complete RFQ
Use a practical checklist before requesting prices.
04 ↗Check certificate scope
Match the certificate to the model and rating.
05 ↗Plan a replacement
Record the existing equipment and site constraints.
06 ↗Compare quotations
Check technical scope, documents and commercial terms.
Start here / Procurement essentials
A better enquiry makes a better starting point.
Bring the electrical ratings, site conditions, destination, quantity and required documents together before requesting a quotation.
Open the transformer RFQ checklist- 01Identify the equipment and application
- 02Define electrical and site requirements
- 03List documents and approval needs
- 04Clarify quantity, destination and timing
The guide library
Read. Check. Prepare.
Use these guides to prepare questions for your technical team and supplier. Project documents govern final selection.
11 Sep 2026
Transformer Replacement in Vietnam: Beyond kVA and Voltage
Transformer replacement in Vietnam requires more than matching kVA and voltage. Check electrical compatibility, installation interfaces, shutdown planning, a...
Read the guide
11 Sep 2026
Vietnam Factory Transformer Procurement: 7 Checks Before Energization
Vietnam factory transformer procurement requires more than choosing a capacity and voltage. Review seven checks covering connection approval, installation re...
Read the guide
10 Sep 2026
Factory Transformers for Vietnam: A Buyer's Guide
Factory transformers for Vietnam require clear connection, load and installation requirements. Use this guide to prepare your specification and request a HEA...
Read the guide
18 Sep 2025
Custom Transformer Project Requirements: A Buyer's Guide
Custom transformer project planning starts with clear electrical, installation and approval requirements. Use this guide to prepare specifications, compare p...
Read the guide
18 Sep 2025
US Distribution Transformer Requirements: Buyer Checklist
US distribution transformer procurement requires separate checks for product standards, DOE efficiency, certification and utility approval. Prepare the evide...
Read the guide
17 Sep 2025
Single-Phase Pad-Mounted Transformer: Specification Guide
Single-phase pad-mounted transformer selection starts with the project requirements. Review voltage, feed arrangement, insulation, terminals, site conditions...
Read the guide
17 Sep 2025
Transformer RFQ Checklist: Information Buyers Should Provide
Transformer RFQ checklist for buyers: prepare electrical ratings, site conditions, drawings, quantity, and delivery requirements before requesting a technica...
Read the guideCompare quotations
Put the proposals
on the same basis.
A lower price is only comparable when the proposed equipment and supply scope match. Record differences and resolve them before ordering.
Equipment
Compare capacity, voltages, phase, frequency, impedance, cooling and installation requirements against the same specification.
Documents and testing
Identify the proposed model, drawings, required test reports and any mandatory approvals. Check what is included and excluded.
Commercial scope
Compare quantity, delivery term and named place, packaging, transport, lead time, payment and warranty in writing.
Project documents
The right document. For the right model.
Tell us which documents your project needs. Availability and applicable scope are confirmed for the proposed model and configuration.
Outline and connection drawings
State the installation, cable-entry and clearance requirements you need to check.
Request for your projectTest and approval documents
Name the required tests, standard or approval, and the model or configuration concerned.
Request for your projectRequest documents for your proposed configuration
Include the model or product type, capacity, voltages, frequency and destination. Ask for the report number, date and test scope so you can check that the documents match the proposed configuration. An individual report does not establish certification for every model or destination.
When reviewing a document, match the legal entity, model, rating, applicable scope and issue date to your proposed equipment.
Read the certificate-scope guideOpen the document centreYour project / next step
Good decisions start with clear requirements.
Send the details you have. We can start the conversation while the remaining requirements are being confirmed.
Discuss your project