Vietnam’s demand is concentrated in industrial zones: a factory takes power from the EVN network at 22 kV or 35 kV, steps it down on its own plot, and owns the substation. That owner-operated substation is exactly the product we build — compact substations and MV switchgear delivered as one tested scope, so the factory’s electrical contractor only terminates cables on site.
Grid Context and Standards
EVN operates the national grid at 50 Hz, with industrial connections commonly at 22 kV or 35 kV and low-voltage supply at 380/220 V. Equipment follows TCVN standards, which align with IEC 60076 for transformer ratings and testing. Utility metering and relay requirements are reviewed per project because the connection agreement sets what has to be inside our scope.
What We Supply
- Compact substations for industrial-zone plots, sized from 100 kVA to 8000 kVA against the load list.
- Cast resin dry type transformers for indoor rooms, favoured in Vietnam for their behaviour in sustained high humidity.
- MV switchgear with the metering and protection scope the connection agreement requires.
- Prefabricated substations for phased factory expansions where capacity is added year by year.
Climate: Heat, Humidity and Condensation
The design question in Vietnam is rarely temperature alone — it is the combination of heat and moisture. Cast resin windings are the default recommendation for indoor rooms because the epoxy encapsulation is indifferent to condensation. For outdoor enclosures we look at filtered forced ventilation, heater elements in the LV compartment, and drainage details, because a sealed enclosure in this climate breathes moisture in with every daily temperature swing. Coastal industrial parks add salt to the same equation, which pushes the anti-corrosion class up.
Conformity, Testing and Shipping
We support project conformity per requirement — IEC 60076 routine test reports, type-test evidence where the consultant asks, and factory witness testing by your engineer or a third party. Standard lead time is 30 days from drawing approval with a two-year warranty, and quotations are issued FOB, CFR or CIF as the shipment plan requires.
Frequently Asked Questions
Which transformer type suits an industrial-zone substation in Vietnam?
For indoor rooms we normally recommend cast resin dry type: the encapsulated winding tolerates the humidity and needs no oil handling. Outdoor plots usually take an oil-immersed unit inside a compact substation enclosure.
Can the scope match EVN connection requirements?
Yes — send the connection agreement. The metering, protection and earthing scope is arranged inside the substation to match it.
What is the lead time?
Standard lead time is 30 days from drawing approval, with a two-year warranty.
Start an Enquiry
Send the single-line diagram, the load list and the site conditions, and we will come back with a proposed arrangement, the applicable standard set and a quotation on FOB, CFR or CIF terms. Email info@xsdfftransformer.com, call +8615867897761, or message WhatsApp +852 5416 2620.