Discover our IEC-certified range of Vacuum Circuit Breaker substations, cast resin dry-type distribution transformers, and step-down power transformers customized for Vietnam's grid parameters.
Vietnam's rapid industrialization—driven by massive foreign direct investment (FDI) into high-tech manufacturing hubs across Bac Ninh, Hai Phong, Binh Duong, and Dong Nai—has placed unprecedented demands on local electrical infrastructure. Under the National Power Development Plan VIII (PDP8), Vietnam Electricity (EVN) is prioritizing grid modernization, high-reliability distribution networks, and seamless integration of utility-scale renewable energy assets in Ninh Thuan and Binh Thuan provinces.
In tropical ambient environments characterized by relative humidity exceeding 90%, extreme monsoon seasons, and coastal salt spray, traditional Air Insulated Switchgear (AIS) substations frequently experience flashovers, insulation degradation, and high maintenance overheads. Leading Chinese original equipment manufacturers (OEMs) and exporters are bridging this technology gap by supplying fully integrated Vacuum Circuit Breaker (VCB) Prefabricated Compact Substations and Cast Resin Dry-Type Transformers optimized specifically for Vietnam's climatic and grid regulatory requirements (IEC 62271-202 and TCVN standards).
How advanced arc-quenching medium and foil-wound core assembly deliver 30+ years of maintenance-free operation under heavy tropical loading.
Utilizing hermetically sealed ceramic vacuum interrupters with Copper-Chromium (CuCr) contact alloy. The vacuum medium provides exceptional dielectric recovery strength, extinguishing electrical arcs within microseconds during short-circuit faults without generating greenhouse SF6 emissions. Ideal for EVN 11kV, 22kV, and 35kV feeder protection.
Continuous high-purity copper or aluminum foil winding eliminates axial transposition forces experienced in conventional round wire windings. Under heavy through-fault current conditions common in industrial zones, foil-wound coils distribute electrodynamic stress uniformly, preventing radial mechanical deformation.
Constructed with cold-rolled grain-oriented (CRGO) silicon steel laminations using 45-degree full-mitred step-lap stacking. This precision geometry drastically lowers no-load excitation currents and magnetic hysteresis losses, yielding ultra-quiet operation compliant with strict urban noise regulations in Vietnam.
| Technical Parameter | Integrated VCB Compact Substation (IEC 62271-202) | Traditional AIS Outdoor Open Switchyard | Operational Impact for Vietnamese Buyers |
|---|---|---|---|
| Footprint Requirement | Ultra-Compact (8 – 15 m²) | Large Land Take (80 – 150 m²) | Saves high real-estate acquisition cost in VSIP & Industrial Parks. |
| Humid Climate Resistance | IP54 Enclosure / Solid Epoxy Cast Insulation | Exposed Bushings / High Flashover Risk | Zero downtime during Vietnam’s heavy 90%+ humidity monsoon seasons. |
| Maintenance Interval | Maintenance-Free up to 30,000 Operations | Frequent Maintenance (Arcing Contacts & Oil Cleaning) | Dramatically reduces OPEX and specialized technician visits. |
| Environmental Safety | Zero SF6 Gas Leakage / Self-Extinguishing Dry Resin | SF6 Pressure Monitoring / Transformer Oil Spill Risk | Fully aligns with green building standards (LEED / Lotus Vietnam). |
| Site Installation Time | Plug-and-Play (Commissioned in 48 Hours) | Complex On-Site Assembly (3-6 Weeks) | Accelerates commercial energization for factory developers. |
Tailoring transformer vector groups, insulation classes, and enclosure protection ratings to specific regional load profiles in Vietnam.
High-density electronic assembly plants operated by global tech giants require uninterrupted, clean power with minimal harmonic distortion. Here, our Cast Resin Dry-Type Transformers (1250kVA - 4500kVA) paired with VCB Ring Main Units (RMU) are placed inside cleanroom-adjacent vaults. Featuring F1 fire resistance and E2 environmental endurance, they guarantee zero oil-leak fire hazards.
Continuous process chemical, textile dyeing, and steel fabrication facilities run high 24/7 motor loads. Our heavy-duty 69kV/33kV 10MVA–30MVA ONAN Oil-Immersed Step-Down Power Transformers equipped with On-Load Tap Changers (OLTC) maintain stable 400V terminal voltage despite fluctuating utility grid voltages, delivering robust insulation margin under continuous 45°C peak ambient heat.
Utility solar string inverters step up voltage to 22kV/35kV grid interconnections. Specialized solar inverter duty transformers designed with dual/multi-split low-voltage windings handle severe harmonic frequencies (K-factor 13 rating) and daily thermal stress cycling, housed inside C5-M anti-corrosion rated marine enclosures built to withstand intense salt atmosphere.
Urban high-rise commercial complexes, hospitals, and critical data infrastructure demand low audible noise (< 52 dB) and strict isolation. Our 3-Phase Isolation Transformers (100kVA - 630kVA) provide electrostatic shielding between primary and secondary circuits, neutralizing common-mode electrical noise and protecting sensitive hospital equipment and cloud server racks.
Integrated production under one quality management system guarantees compliance, reliability, and fast lead times for Vietnamese buyers.
Our self-owned, ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 certified manufacturing base houses precision laser CRGO cutting machinery, automated vacuum pressure impregnation (VPI) chambers, epoxy resin casting molds, and heavy structural tank fabrication bays.
Every unit undergoes mandatory factory routine testing in our state-of-the-art laboratory before clearance: Voltage Ratio & Vector Group Check, Winding Resistance, Insulation Resistance, Partial Discharge Test (< 10 pC for dry-type), Separate-Source AC Withstand Voltage, and Full-Load Thermal Rise Verification.
We warmly welcome third-party international inspection agencies requested by Vietnamese clients—including SGS, TÜV Rheinland, Bureau Veritas, and Intertek—or customer engineering representatives to conduct factory acceptance testing (FAT) prior to packing.
| Equipment Family | Capacity Range | Primary Voltage Class | Insulation Medium | Applicable Standards |
|---|---|---|---|---|
| VCB Substation (Compact Kiosk) | 250 kVA – 3150 kVA | 11 kV / 22 kV / 35 kV | Vacuum Circuit Breaker + Dry/Oil Trans | IEC 62271-202, IEC 62271-100 |
| Oil-Immersed Step-Down Power Trans | 5 MVA – 30 MVA | 33 kV / 69 kV / 110 kV | Mineral Oil / Synthetic Ester (ONAN/ONAF) | IEC 60076-1, IS 2026, TCVN 6306 |
| Cast Resin Dry-Type Transformer | 100 kVA – 4500 kVA | 10 kV / 11 kV / 15 kV / 20 kV | Epoxy Resin Cast (AN / AF) | IEC 60076-11, CE Listed |
| Low-Voltage Isolation Transformer | 15 kVA – 630 kVA | 220V / 380V / 415V / 480V | Dry Type VPI / Class H Insulation | IEC 61558-2-4, CE Standard |
Under the ASEAN-China Free Trade Area (ACFTA) agreement, our export department provides validated Form E Certificates of Origin. This grants Vietnamese importers preferential import tax rates (0% import duty on most electrical transformer and switchgear tariff lines under HS Code 8504 and 8537), significantly reducing landed capital expenditure.
To protect sensitive high-voltage components against sea mist and moisture during ocean transit, equipment is wrapped in vacuum-sealed VCI anti-corrosion film, protected by desiccant packs, and housed in heavy-duty fumigated wooden crates reinforced with steel corner framing suitable for open-top or flat-rack container ocean freight.
Leveraging strategic proximity to major coastal shipping hubs, transit lead times to Northern Vietnam (Hai Phong Port) and Southern Vietnam (Cat Lai / Tan Cang Ho Chi Minh Port) average just 5 to 9 days. This direct maritime connectivity ensures strict adherence to EPC project timelines.
Clear technical and commercial answers addressing customs clearance, EVN compliance, warranties, and customization.
