Compact Substation Buying Guide: How to Choose the Right Solution for Your Power System

Compact substations are essential for modern industrial and commercial power systems. They combine high-voltage and low-voltage equipment, a transformer, and protection devices into a single unit. This integrated structure makes installation faster and reduces land use compared with traditional substations. For companies that value space efficiency, safety, and low maintenance, compact substations are an ideal option.

Byyou has years of experience in designing and producing high-voltage and low-voltage power distribution solutions. Our compact substations are widely used in factories, commercial buildings, new residential areas, and renewable energy systems.

What is compact substation

A compact substation, also known as a box-type or prefabricated substation, is a complete set of equipment used to step down high voltage from the grid to a lower level for local use. It integrates a transformer, high-voltage switchgear, low-voltage distribution panel, and protection devices in a closed structure. These units are suitable for areas with limited space and require fast and safe installation.

There are two main types of compact substations offered by Byyou:

• YBM-12/0.4 Compact Substation, suitable for industrial, commercial, and community power distribution.
• ZGS-12/0.4 Compact Substation, an American-style prefabricated model designed for residential areas, construction sites, airports, and green zones.

Core components of a compact substation

Transformer
The transformer is used to step down high-voltage electricity, usually from 10kV or 11kV to 0.4kV for low-voltage use. Byyou offers both oil-immersed and dry-type transformers. Each type has strong overload capacity, low noise, and high efficiency.

Switchgear
The high-voltage switchgear connects to the grid and protects the system during operation. Byyou’s compact substations support terminal, ring network, or dual power supply modes. When using SF6 load switchgear, the equipment remains compact while maintaining high safety.

Distribution Panel
The low-voltage distribution cabinet distributes power to various loads, such as lighting, production lines, or buildings. It ensures stable operation and easy control for end users.

Protection and Control Devices
These include fuses, relays, and optional remote terminal units (RTU). The RTU allows remote monitoring, short-circuit detection, and automatic fault reporting, which helps users manage the power system more efficiently.

Structure and Enclosure
The enclosure protects all internal parts. It is made from stainless steel, aluminum alloy, color steel composite plate, or non-metal materials. These materials are anti-aging, waterproof, flame-retardant, and corrosion-resistant. The box has natural ventilation and optional forced cooling to maintain normal operating temperature.

Benefits of Compact Substations

Compact substations offer several practical advantages that make them an ideal choice for industrial and urban power distribution. Their small size and integrated design save space, making installation possible even in narrow areas such as city streets or construction zones. The factory-assembled design ensures quick installation and minimal on-site work, reducing construction time and labor costs.

Safety and reliability are also key benefits. All high-voltage and low-voltage parts are enclosed, reducing the risk of electrical faults, fire, or human contact with live components. Protection systems like the “five defenses” in Byyou’s YBM-12/0.4 ensure safe and simple operation.

Compact substations are highly efficient. The transformers used inside have low energy loss, and the switchgear components meet national and IEC standards for efficiency and reliability. They also operate with low noise, which makes them suitable for public or residential areas. Their durable structure and anti-corrosion materials allow long-term outdoor use in harsh conditions such as high humidity, heat, or dust.

Finally, compact substations are cost-effective over time. Although the initial purchase cost may be higher than traditional setups, they save money through lower installation, operation, and maintenance costs. With a typical service life of over 20 years, they offer strong value for long-term use.

Key Factors to Consider Before Buying

Before purchasing a compact substation, several key points should be reviewed carefully. First, confirm the voltage and capacity required by your facility. For example, both Byyou YBM-12/0.4 and ZGS-12/0.4 models are designed for 10–12kV input and 0.4kV output, suitable for most industrial and urban applications. Choosing the correct capacity ensures stable performance under both normal and peak load.

The environmental conditions of the installation site must also be evaluated. Both Byyou models are suitable for altitudes up to 2000 meters and temperatures from -25℃ to 40℃, with high humidity resistance. If your project site has special conditions beyond this range, customization is available.

Another important factor is space and location. Compact substations should fit within your layout without affecting accessibility or ventilation. The YBM-12/0.4 design allows different arrangements of transformer and switchgear rooms to match your site plan.

Make sure the equipment complies with safety and quality standards, such as GB17467-2010 “High Voltage/Low Voltage Prefabricated Substation.” Compliance ensures that the product is reliable and approved for use in most markets.

Also consider maintenance and service support. Byyou provides complete after-sales service, spare parts, and remote technical support to help customers maintain long-term performance. Finally, compare the total cost of ownership, not just the purchase price. Reliable, efficient equipment will save more in maintenance and energy consumption over time.

How to choose the right compact substation supplier

Experience
Select a supplier with strong experience in power equipment manufacturing. A professional supplier understands technical details and can help with design, configuration, and installation. Working with an experienced team ensures that your compact substation will meet your project’s technical and safety requirements.

Technical Capability
Make sure the supplier can provide customized designs, factory testing, and full technical support. A reliable supplier should have qualified engineers who can assist throughout the project—from planning and product selection to on-site installation and operation guidance.

Product Range
Choose a supplier that offers a complete product line, including high-voltage switchgear, RMU, transformers, and compact substations. A full product range ensures compatibility between components and simplifies procurement and future maintenance.

Certifications
Check that the supplier’s products are certified by international and national standards such as IEC and ISO9001. These certifications guarantee that the compact substation meets strict quality and safety requirements and has passed performance testing.

Customization Ability
Different projects require different solutions. A good supplier should be able to customize voltage levels, transformer types, and enclosure materials according to your needs. This flexibility helps ensure that the substation fits your site environment and electrical system.

Service and Support
After-sales service is important for long-term system reliability. Choose a supplier that provides regular maintenance, spare parts, and quick technical response. Reliable service support reduces downtime and extends the lifespan of your equipment.

Delivery and Logistics
Timely delivery is essential for project scheduling. A professional supplier should have a clear production plan, efficient logistics, and export experience to ensure your compact substation arrives safely and on time.

Conclusion

Buying a compact substation is an important decision that affects your entire power system. Choosing the right product and supplier ensures safety, reliability, and long-term efficiency. Byyou’s YBM-12/0.4 and ZGS-12/0.4 compact substations are built according to GB17467-2010 standards and designed to perform in various environments, including urban, industrial, and rural areas. They offer stable operation, compact size, strong protection, and easy installation. Byyou is a professional manufacturer with rich experience in HV switchgear, RMU, and compact substations. Our products are made with high-quality materials, tested for safety and performance, and supported by full after-sales service.