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Viet Hoa Phat Trading Investment Joint Stock Company (VIHOPHA) provides turnkey solutions for medium voltage transformer station systems up to 35kV, including equipment supply, installation, electrical documentation, and commissioning for power energization:
- Consulting on optimal transformer capacity selection
- Technical drawing and design
- Power supply application and grid connection agreements
- Supply of Oil-immersed or Dry-type transformers
- Installation of medium voltage underground cables up to 35kV
- Installation of RMU (Ring Main Unit) medium voltage switchgear
- Installation of Low Voltage (LV) panel systems
- Testing, inspection, and commissioning for power energization
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Suitable for:
- Manufacturing plants and industrial parks
- Resorts, hotels, and tourist complexes
- Apartments and office buildings
- Commercial centers
- Technical infrastructure projects
- Administrative and public service units
- The installation process is executed under the ISO Quality Management System and strictly complies with electrical industry technical standards, ensuring safety, stability, and adherence to current regulations.
Classification of Transformer Stations
Depending on capacity and installation conditions, 22kV–35kV medium voltage transformer systems are classified into the following 6 main types:
Compact Substation (Kiosk Station)
A Kiosk station is a compact, integrated unit that synchronizes medium voltage switchgear (RMU), a transformer, and a low voltage panel (MSB) within a sealed, powder-coated steel enclosure. VIHOPHA designs, installs, and integrates these according to the specific technical configuration of each project.
- Integrated into a single unified block.
- High aesthetic value for urban projects.
- Extremely high operational safety level.
- Fast construction, maximum space-saving.
Outdoor Pad-mounted Transformer Station
A solution where the oil-immersed transformer is placed on a concrete pad within an outdoor campus, suitable for facilities with high energy demand and ample space.
- Typically applied for transformers of 630kVA and above.
- Suitable for projects with large load capacities.
- Requires a spacious campus area.
- Easy access for inspection, maintenance, and upgrades.
Indoor Transformer Station (Oil-immersed Type)
A system utilizing oil-immersed transformers installed within dedicated technical rooms inside buildings or factories.
- Safe installation within technical room spaces.
- Requires strict oil collection pit designs and fire protection solutions.
- Stable operation, unaffected by weather.
- Minimized negative impact from the external environment.
Pole-mounted / H-Frame Transformer Station
The transformer is mounted on a sturdy steel frame or directly onto a centrifugal concrete pole system, optimized for residential areas or transmission infrastructure.
- Applicable for small capacity transformers (≤630kVA).
- Low investment cost, saving project budget.
- Simple structure, extremely fast construction time.
- Difficult to maintain, affects aesthetics.
Single Column Transformer Station
Utilizing an independent steel frame or column to install the transformer and outdoor medium voltage equipment, providing a modern and tidy appearance.
- Significant space savings compared to built-in stations.
- Flexible layout across various terrains.
- High safety level when designed to technical standards.
- Solid structure with high aesthetic appeal.
Indoor Dry-type Transformer Station
A high-end solution using cast resin transformers, completely free of insulating oil, specifically designed for areas requiring absolute fire and explosion safety.
- Maximum fire and explosion safety (no oil leakage or combustion).
- High equipment durability and quiet indoor operation.
- Very low maintenance and service costs.
- Ideal for basements, apartments, and hospitals.
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Consultation
& Quotation
- Optimizing substation solutions for projects of all scales.
- Custom design for Kiosk, Pole-mounted, and Pad-mounted stations based on budget.
- Turnkey technical documentation and EVN power energization procedures.
