Dong Nai · Nhon Trach II
RVN Fibers – 2 × 2,500 kVA
A twin-transformer industrial substation with 22 kV supply, LV distribution, site installation and energisation in December 2024.
QUANGANHCONS · INDUSTRIAL MV/LV EPC
Vietnam 22 kV Substation Cost Calculator & EPC Project References
Get an indicative transformer substation budget, understand the MV/LV package and review our delivered factory and urban power projects before issuing your RFQ.
Indicative costs only. Final offer after equipment/BOQ and site checks.
What determines transformer substation cost in Vietnam?
A quoted price for a transformer is not the total installed substation price. EPC cost depends on transformer quantity and kVA, HV/LV switchgear and protection, site civil works, overhead and underground MV feeders, earthing, testing, commissioning interfaces and local utility requirements. Two projects with identical transformer capacity can have materially different scope, cable lengths, construction conditions and delivery schedules. Your RFQ must identify those differences rather than relying on an unqualified cost per kVA.
How to use the quick substation budget calculator
- Select the substation arrangement: pole-mounted, two-pole platform, steel-pole, outdoor ground-mounted, prefabricated kiosk or indoor room as supported by the tool. Select the practical site arrangement before assessing cost.
- Specify installed transformer capacity: examples include 1×630 kVA, 1×1000 kVA or 1×2500 kVA. A 2×2500 kVA installation requires a separate layout, switching scheme and protection review; it must not be priced by simply assuming one 5000 kVA unit.
- Confirm voltage and service characteristics: a common base case is 22/0.4 kV, with final supply voltage and metering arrangements subject to the local network operator. Where 35 kV or unusual service conditions apply, seek a project-specific estimate.
- Enter overhead MV route length: include the indicative routed distance, branch point and practical pole/line constraints; do not combine this with the underground feeder length.
- Enter underground MV cable length separately: reflect actual routing, joint/termination locations, ducts, trenches and any road crossings or reinstatement scope.
- Review equipment and operating assumptions: transformer selection, power factor, ambient temperature, LV connection method and package options. Incomplete technical data should result in an RFQ flag, not an invented product rating or unverified price.
- Read the estimate and its exclusions: compare like-for-like configurations, then submit a single-line diagram (SLD), BOQ, load schedule, location and target energisation date for a formal quotation.
Go directly to the tool: Substation Construction & Quick Budget Estimate. The calculator may provide indicative pricing only for configurations with suitable price data and defined assumptions. Live-line work, multiple-transformer schemes and special MV feeders require separate engineering review.
EPC cost breakdown / BOQ checklist for an industrial substation
Request a cost schedule that separates supply, civil/electrical installation, documentation and acceptance. The following checklist is a commercial scope matrix, not a published fixed-price tariff.
| Cost package | Typical scope to quantify | Procurement decision |
|---|---|---|
| Engineering & approvals | Survey, SLD, drawings, utility connection package, method statements | Who owns design and utility interfaces? |
| MV feeder works | 22–35 kV cable/overhead line, poles, trench/duct, joints and terminations | Actual route length and road reinstatement? |
| MV switching & metering | RMU, LBS/FCO, VCB if required, surge arresters, CT/VT interface | Utility-approved connection/protection scheme? |
| Transformers | Oil/dry type, kVA, voltage ratio, losses, quantity and accessories | Specified datasheet, tests and accepted manufacturer? |
| LV distribution | MSB, ACB/MCCB, busbar/busduct, LV cables and PFC where applicable | Fault level and selectivity verified? |
| Civil, earthing & auxiliaries | Foundations, enclosure/room, earth grid, ventilation, drainage | Ground conditions, flood risk and fire strategy? |
| Installation & close-out | Delivery, lifting, wiring, inspections, tests, commissioning coordination and as-builts | Responsibilities, acceptance, programme and warranty? |
Explicitly identify VAT and applicable tax treatment, cables to downstream loads, special piling, live-line work, third-party charges, permitting, major road crossings and project-specific fire provisions. Do not assume any item is included merely because the bid is labelled “turnkey”.
Engineering sanity check: 1,000 kVA transformer at 22/0.4 kV
For a balanced three-phase transformer, the nominal line current is I = S/(√3 × U), with S in kVA and line-to-line U in kV. For a 1,000 kVA – 22/0.4 kV example: 26.24 A at 22 kV and 1,443.4 A at 400 V. These are preliminary current values, not final ratings for circuit breakers, cable cross-sections or busbars. Select equipment after checking short-circuit duty, load derating, voltage drop, thermal withstand, transformer impedance and protective-device coordination.
Procurement advice for international buyers and FDI manufacturers
Budget estimate: useful for early capital approval when site data is incomplete, but it must disclose assumptions and exclusions. Technical RFQ: issue the same SLD/BOQ, transformer loss limits, manufacturer requirements and utility interfaces to each bidder. Contract quotation: confirm scope split between investor, industrial-zone utility, engineering consultant and EPC contractor; currency/taxes, lead time, payment milestones, warranties, factory/site tests and acceptance documentation must be explicit.
Single versus multiple transformers: the installed kVA sum is not necessarily firm N−1 capacity. A two-transformer scheme may require LV bus-section devices, interlocks, independent MV feeders and a defined operating philosophy. Establish this before comparing two bids.
For broader construction scope, see our transformer substation construction service and industrial electrical EPC services. For a structured buyer enquiry, use the Request a Quote portal.
EVIDENCE FROM THE FIELD
Selected QuangAnhcons substation and electrical works
Watch QuangAnhcons installation footage, then browse five documented industrial and urban MV/LV project references. Images are taken from project articles in the QuangAnhcons website network.
Electrical substation field construction – QuangAnhcons
Documented references do not imply a certification, equipment approval or a guarantee of identical scope for a new project. Check actual drawings, manufacturer data and testing records for every RFQ.
Frequently asked questions
How much does a 630 kVA or 1,250 kVA substation cost in Vietnam?
A single price is not reliable without the substation arrangement, transformer type, MV cable route, switching/metering design, foundations and delivery scope. Use the online estimator for an initial budget where supported, then request a project-based BOQ quotation.
Does the substation estimate include the transformer and switchgear?
The scope depends on the selected configuration. Review the tool’s inclusions and exclusions and request a detailed BOQ specifying the transformer, MV switchgear, LV MSB, feeder, earthing and construction works.
Can I use a 22 kV calculator for a 35 kV project?
No direct extrapolation should be assumed. Voltage class, insulation, MV equipment, clearances, metering, protection and site approvals require a separate engineering review.
Can a quotation be prepared from preliminary design?
Yes, an indicative estimate can be discussed provided assumptions, provisional quantities and missing site/utility information are disclosed. A binding commercial offer should follow a defined RFQ basis and scope.
What should an overseas procurement team send for an accurate quotation?
Project location, load schedule, required kVA/number of units, voltage, SLD, MV feeder route, site layout, required equipment brands/specifications, ownership boundaries and target energisation date.
Request a Vietnam transformer substation EPC quotation
QuangAnhcons supports industrial plants, logistics facilities and development projects with scope review, MV/LV construction and agreed utility/commissioning interfaces. Share your tender BOQ, drawings, capacity, location and target programme.
TRY THE COST CALCULATORSUBMIT A PROJECT RFQ
Email: sales@quanganhcgte.com · Hotline: +84 919 758 191
Technical and commercial guide updated 21 October 2026. Estimates are not contractual offers, approved designs, utility permits or certifications. Final scope, applicable standards, equipment specifications, tests and local approvals must be verified for the project.
QUANGANHCONS
Substation budget estimate
Select the capacity, route lengths and package to view your indicative budget and electrical parameters.
01 Quick estimate
Request a project quotation
Send your project details, BOQ or drawings to request a formal quotation. Fields marked * are required.
Quotation scope
Applies to one EVN-supplied substation with oil-immersed transformers at 22/0.4 kV (single-phase: 12.7/0.23 kV), with MV metering VTs/CTs supplied by EVN. The estimate includes the selected equipment, installation, earthing, transformer-to-main-breaker connections, design and connection documentation, and coordination of testing and utility acceptance.
Kiosk, integrated steel-pole and indoor substations include MV switchgear and the entered underground cable route. Other outdoor arrangements use the relevant protection configuration. The final diagram must meet the project connection requirements.
Excludes VAT, cables from the substation switchboard to the MSB/loads, live-line work, harmonic reactors, weak-ground treatment or special piling, land and special fire-protection provisions. Underground routes assume normal construction conditions and exclude road drilling and special reinstatement.
Prices are indicative investment budgets. A formal quotation follows site assessment and agreement on the configuration. Electrical selections are preliminary and require design verification before installation.
Capacity range and application conditions
The catalogue defines the enquiry range of this tool, not universal TCVN capacity limits. Single pole-mounted transformers: 15–100 kVA; three-unit banks: 3×15–3×100 kVA. Platform substations: 100–630 kVA. Steel-pole substations: 100–630 kVA; 750/800 kVA require design verification and local approval. Ground-mounted, kiosk and indoor configurations: 50–10,000 kVA. Not every configuration has a package price or the same structural design.
Reference: EVN Decision 1299/QD-EVN dated 3 November 2017, Volume 1, sections 3.3–3.4. Check the current requirements of the responsible utility before implementation. Kiosks must meet manufacturer ratings and testing requirements (IEC 62271-202); indoor and ground-mounted arrangements must meet project layout, ventilation, structural and fire-protection requirements. For multiple transformers, specify the quantity and capacity of each unit.
Developed by QuangAnhcons · © 2026 QuangAnhcons. Code licensed under GPL-2.0-or-later. Standards and manufacturer data belong to their respective owners.