Power Transformers for Vietnam’s Industrial & Distribution Projects
Explore transformer solutions for Vietnam’s 22kV and 35kV medium-voltage networks, manufacturing plants, industrial parks and utility substations. DHDL can review transformer designs against your project’s connection voltage, capacity, installation conditions and technical specifications.
Illustrative product scene, not a photographed installation in Vietnam.
Understanding Vietnam’s Power Grid & Industrial Supply
Vietnam’s electrical grid includes medium-voltage distribution feeders, 110kV substations and 220/500kV transmission networks. Industrial park projects frequently involve a 110kV substation feeding 22kV distribution, but the exact point of connection and supply arrangements are site-specific.
22 kV Networks
Relevant to many industrial feeders, manufacturing loads and medium-voltage-to-low-voltage transformer projects.
35 / 15 / 10 / 6 kV
Other nominal distribution levels remain in the regulatory voltage framework. Match the equipment to the actual local grid and connection documents.
110 / 220 / 500 kV
110kV is listed within the distribution system; 220kV and 500kV are transmission voltages. Higher-voltage equipment requires separate technical and manufacturing feasibility review.
Vietnam nominal grid voltages are reference values—not a claim that every DHDL transformer model is available for each rating.
Vietnam Transformer Voltage & Specification Reference
Vietnam’s Circular 05/2025/TT-BCT lists nominal distribution voltages of 110, 35, 22, 15, 10, 6 and 0.38kV; transmission voltages are 220kV and 500kV. The following transformer ratios are illustrative engineering configurations, not universal national requirements.
| Project context | Grid reference | Transformer evaluation | Specify before ordering |
|---|---|---|---|
| Industrial LV supply | 22kV / low voltage | 22/0.4kV may be evaluated where the utility and load require it | Actual LV nominal voltage, winding ratio and tapping range |
| Other MV distribution | 35kV | 35kV-side distribution or industrial transformer options | Connection drawings, insulation level and utility standards |
| Industrial park substation | 110kV / 22kV | Power-transformer projects connecting a 110kV station to 22kV feeders | Capacity, short-circuit impedance, vector group and protection |
| Existing regional distribution | 6 / 10 / 15kV | Site-specific MV/LV or MV/MV transformers | Verify the actual network voltage rather than assuming 22kV |
| Transmission network | 220 / 500kV | Grid context only; specialist power-transformer engineering review | No implied DHDL supply or certification commitment |
Use the site’s single-line diagram, utility specification and latest applicable regulations as the governing documents.
Transformer Options for Vietnam’s Project Requirements
Select the transformer construction after checking the required supply voltage, loading pattern, environment and installation space.
Oil-Immersed Distribution Transformers
For outdoor and utility-connected distribution applications, including project-specific medium-voltage-to-low-voltage supply.
Explore transformers →Dry-Type Transformers
For selected indoor factories, commercial buildings and industrial electrical rooms where dry-type construction meets project requirements.
Explore transformers →Substation Power Transformers
For industrial park substations and larger utility connections; voltage, MVA rating and feasibility are reviewed against project documents.
Discuss a specification →Choosing a Transformer for a Vietnam Project
01. Confirm Grid Connection
Request the utility-approved single-line diagram, primary and secondary nominal voltages, and operating frequency.
02. Define Load & Capacity
State the required kVA/MVA, continuous and peak load, motor starting requirements and expected plant expansion.
03. Check Climate & Installation
Consider tropical heat, humidity, ventilation, flood exposure and corrosion protection where relevant.
04. Coordinate Electrical Design
Confirm tap changer, vector group, impedance, earthing, insulation and protective-device coordination.
05. Agree Standards & Losses
Supply the project IEC/TCVN or utility requirements, efficiency targets, loss limits and acceptance-test plan.
06. Plan Delivery Documents
Clarify drawings, packing, test reports, certificates required by the tender, and the agreed delivery scope.
Where Transformers Support Vietnam’s Industries
Factories & Industrial Parks
Electrical distribution for production lines, machinery, warehouses and industrial-park tenants with differing load needs.
110/22kV Substations
Project-specific transformer selection at 110kV substations supplying 22kV distribution feeders.
Infrastructure & Utility Upgrades
Transformers for distribution system reinforcement and facility power supply, subject to project specifications.
Project-Based Manufacturing & Technical Review
DHDL offers transformer and power distribution equipment options for utility and industrial applications. For Vietnam projects, our first step is to review actual HV/LV voltages, load capacity, environmental conditions and relevant specification documents.
Any project-specific configuration, standards compliance, test scope and delivery requirements must be confirmed in the technical offer before purchase.
Browse transformer range →FAQ: Transformers for Vietnam
What is the common medium-voltage distribution level in Vietnam?
22kV is important for many distribution and industrial applications, but the national voltage framework also includes 35, 15, 10 and 6kV levels. Confirm the actual utility point of connection for each project.
Can a 22/0.4kV transformer be used for a Vietnam factory?
It can be considered when the approved incoming supply and required low-voltage output match those ratings. Final winding voltage, capacity, tap range and insulation requirements must be confirmed from project documents.
Is 110/22kV relevant for industrial parks?
Yes, documented industrial-park grid projects include 110kV substations with 22kV feeders. That does not mean every park has the same configuration.
What is Vietnam’s nominal grid frequency?
50Hz under the national electricity regulations. The supplied transformer specification and any project-specific requirements should still state frequency explicitly.
What technical information is needed for a quotation?
Share the single-line diagram, HV/LV winding voltages, capacity, quantity, frequency, vector group, impedance, installation conditions, applicable standards and required acceptance tests.
Can DHDL supply customized transformers for Vietnam?
DHDL can review custom technical requirements and propose suitable options where manufacturing capability and project specifications allow. Final feasibility and compliance are subject to confirmation.
Need a Transformer for Your Vietnam Project?
Send your project location, HV/LV voltage ratio, capacity, quantity, installation conditions and electrical drawing. Our team can review the information and discuss an appropriate transformer solution.
Technical reference: Vietnam Ministry of Industry and Trade — Circular 05/2025/TT-BCT, Article 6; EVN — An Hoi 110kV substation and 22kV industrial-park feeders. Reference voltages are not final specifications or supply commitments.