Quotation for 400kVA Transformer Station: Features, Structure, and Construction Costs

The quotation for a 400kVA transformer station depends on the machine type, accompanying equipment, location, and station type. Detailed features and specific structure.

Features of 400kVA Transformer Station

The 400kVA transformer station has a capacity of 400 kVA and uses primary voltage of 10kV, 22kV, 35kV with secondary voltage of 0.4kV. It operates at a frequency of 50 Hz, suitable for systems requiring 3-phase transformer stations. This voltage device is usually designed with an oil-immersed tank, providing good insulation and cooling capabilities, meeting the need for stable electrical power capacity.

The 400kVA transformer station plays a crucial role in transmitting electrical power from the high-voltage network down to the low-voltage network. With a capacity of 400kVA, this transformer station is suitable for a wide range of applications from residential to industrial.

Structure and Design

Hanging Transformer Stations

The hanging transformer station is an ideal choice for saving space. The entire protection system and transformer are mounted on a galvanized steel support frame between two power poles, applicable for grid voltages from 35kV to 6kV on the high-voltage side and 0.4kV on the low-voltage side.

Kios Transformer Station

The kios transformer station features a complete unit design with a sheet metal casing and metal frame, integrating three compartments for medium voltage, low voltage, and transformer. This type stands out for its compactness, ease of installation, and flexibility in relocation when needed.

Steel Column Transformer Station

The single-body steel column design uses oil or Amorphous transformers. With an attached foundation and cap, this type not only optimizes functionality but also enhances the aesthetic of the project.

Technical Specifications

• Capacity: Designed with a capacity of 400kVA, sufficient to meet the electricity needs for residential areas, factories, and medium to small industrial zones.
• Voltage: High voltage levels range from 22kV to 6kV, while low voltage is 0.4kV.
• Type of Transformer: The 400kVA transformer can use oil-immersed or Amorphous type depending on usage requirements.

Applications and Advantages

The 400kVA transformer station is suitable for various applications:

• Residential Areas
• Factories
• Medium and Small Industrial Zones

Notable advantages:

• The hanging transformer station saves space.
• Kios stations are suitable for narrow spaces, requiring high aesthetics.
• Steel column with a cap helps increase aesthetics.

Selection Considerations

The choice of transformer station type requires careful consideration based on installation location, purpose, space, and cost. Moreover, technical standards are also essential factors in transformer station design.

Structure and Accompanying Devices of the Transformer Station

The structure of the transformer station includes transformers, station casing, circuit breakers, capacitors, along with cable and accessory systems. The transformer weighs 1786 kg with 388 kg of oil and 1065 kg of core. The casing is made of thick sheet metal, powder coated, providing effective insulation. Circuit breakers employ ACB/MCCB, with optional rated current, and capacitors according to user needs to adjust the power factor.

The transformer station plays a pivotal role in voltage conversion to meet society’s power needs. Its structure includes three main components: transformers, distribution and control systems, and lightning protection grounding systems.

1. Transformer

• Structure: The transformer consists of a steel core made of electrical steel sheets and coils wound around the core to conduct magnetic flux and perform voltage conversion. The casing serves to protect the internal components.
• Function: The primary purpose of transformers is to alter the voltage of alternating current without changing the frequency.

1. Distribution and Control System

• Main Components: Includes medium voltage cabinets, low voltage cabinets, isolating switches, and measuring devices.
• Function: This system manages current control, protects the system from failures, and provides safe power supply to loads.

1. Lightning Protection Grounding System

• Equipment: Includes lightning arresters, surge protectors, and grounding rods.
• Function: Protects the transformer station from direct and indirect lightning strikes, ensuring safety and durability for the entire system.

Additionally, transformer station types like column stations, hanging stations, and distribution transformer stations are diversely designed to suit different usage purposes.

• Column Transformer Station: Mount the transformer on a steel column or concrete pole, saving space and enhancing aesthetics.
• Hanging Transformer Station: Devices are fixed on power poles, easily installed, and efficiently used.
• Distribution Transformer Station: Takes on the role of converting and distributing power to residential and industrial areas, integrating transformers with advanced control systems to optimize operation.

With such structure and accompanying equipment, transformer stations significantly contribute to maintaining stability and efficiency in power supply.

Construction Costs and Influencing Factors

The construction cost of a 400kVA transformer station is influenced by the installation location, material origin, and station type, typically ranging from 468 million to 510 million VND excluding VAT and other costs. Investors need to choose a reputable unit to ensure the project quality and comply with electrical safety standards.

In the construction field in Vietnam, construction cost is a crucial factor determining the final project cost. Construction costs are usually calculated per square meter and may vary depending on technical and execution factors.

Construction Pricing

Initial construction costs involve primitive stages like excavation, building walls, and finishing touches. The raw construction cost ranges from 3,350,000 to 4,000,000 VND/m². Meanwhile, the finishing construction cost, covering tasks like tiling, painting, and door installations, typically comes under a full-service package.

Package House Construction Pricing

For comprehensive construction services, costs range from 4,800,000 to 6,500,000 VND/m², depending on the chosen service package. For villas, these costs may be higher.

Factors Affecting Construction Costs

Factors affecting construction costs include:

1. Area and Construction Conditions: Larger areas may decrease cost per square meter, while challenging construction conditions can increase costs.
2. Material Type: Using high-quality building materials also contributes to increased construction costs.
3. Construction Location: Labor and material costs vary by region.
4. Labor: In major cities, construction labor costs are typically high, increasing total costs.
5. Architecture and Design: Complex architecture requires higher construction techniques, leading to higher costs.

Investors should pay attention to these factors and plan in detail to optimize costs and ensure project quality.

Understanding the quotation for a 400kVA transformer station and technical factors helps optimize investment efficiency. Correct decisions in selecting equipment and construction units will bring long-term benefits in both technical and financial aspects.

Contact QuangAnhcons now at hotline 09 1975 8191 for quality and suitable 400kVA transformer station installation advice.

QuangAnhcons specializes in providing consultation, installation, and construction services for 400kVA transformer stations with commitments to technical and quality assurance, optimizing electrical systems for businesses.