Modular Box-Type Substation

Q: What components are typically included in a box‑type substation?

Typical components include medium‑voltage switchgear , a distribution transformer (oil‑immersed or dry‑type), low‑voltage distribution panels , protection devices , and sometimes reactive power compensation or control/monitoring equipment.

Q: What are the advantages of a modular box‑type substation compared to a traditional brick‑and‑mortar substation?

Box‑type substations have a smaller footprint , faster installation , lower civil engineering cost , factory testing , and integrated protection and safety features . They can be installed quickly with minimal site preparation.

Q: Where are box‑type substations commonly used?

They are widely used in urban power distribution networks , industrial facilities , residential communities , construction sites , mines , oil and gas fields , and renewable energy projects such as wind and solar farms.

Q: What voltage levels can box‑type substations support?

Box‑type substations are typically designed for medium‑voltage distribution networks , commonly in ranges like 10 kV , 11 kV , and 35 kV , depending on system requirements.

Q: Are box‑type substations suitable for outdoor installation?

Yes. The enclosure is often weatherproof, dustproof, and rust‑resistant , with proper protection ratings (such as IP54 or above), allowing them to operate safely outdoors in various environments.

Q: What safety features are important in a box‑type substation?

Important safety features include dead‑front design with no exposed live parts , sealed enclosures, grounding systems , fireproof and heat‑insulating materials , and integrated protective relays to prevent faults and enhance reliability.

Q: What environmental conditions should be considered when installing a box‑type substation?

Considerations include ambient temperature range , altitude , humidity , ventilation , protection from contaminants , and ensuring the installation site is free from strong vibrations or corrosive gases.

Q: Can a box‑type substation be customized for specific project needs?

Yes. Modular substations are often customized with different switchgear arrangements, transformer capacities, protection schemes, automation interfaces, and enclosure finishes to meet project‑specific requirements.

Our company designs and manufactures a range of power substation containers, including SVG containers, photovoltaic inverter containers, and high-voltage frequency converter containers. These box-type substations are designed for efficient integration and easy installation, ideal for reducing on-site construction time and simplifying commissioning processes.

Key Features:

Aesthetic Design: The prefabricated electrical cabin is designed to be visually appealing, coordinating with the surrounding environment. It ensures that components like air conditioning and intake ports are positioned logically, and the color scheme matches surrounding equipment like transformer substations and high-voltage switchgear.

Optimized Dimensions: The dimensions of the container are chosen to accommodate both transportation and on-site installation requirements, ensuring that equipment is easy to transport and install.

Simplified Wiring: The design reduces external wiring by utilizing standardized connection interfaces, streamlining the assembly process and reducing the risk of installation errors.

Integrated and Modular Design: The electrical substation box is designed for factory-based assembly, minimizing on-site work. The equipment is pre-installed and wired at the factory, allowing for easy and quick connection to external systems on-site.

Why choose modular box-type substations

Our prefabricated electrical cabin integrates primary and secondary equipment in a single modular unit. It significantly reduces the on-site construction and commissioning time, with a modular and factory-customized design. This approach ensures fast deployment and a simplified commissioning process, making it ideal for environments that require rapid setup. The electrical substation is pre-fabricated to reduce the amount of on-site labor and wet operations, cutting down construction periods for both the civil and electrical works.

With an integrated design, the substation house reduces the complexity of installation and ensures a quicker path to operational readiness, improving efficiency and reducing downtime.

Product Advantages

Factory Prefabrication, Quick On-Site Assembly: All equipment, wiring, and cabinets are pre-installed and tested in the factory, requiring only basic installation and connection on-site, significantly shortening construction time.

Compact and Space-Efficient: Integrated design maximizes space utilization compared to traditional civil substation designs, ideal for land-constrained projects.

Strong Environmental Adaptability: High protection rating (IP54 and above) ensures resistance to rain, dust, corrosion, and heat insulation, making it suitable for direct outdoor placement in harsh environments.

Low Civil Engineering Cost: Reduced concrete and masonry work, simple foundation, lower overall cost, and faster investment recovery.

Movable and Expandable: The modular design allows for easy lifting and relocation, with flexible expansion and modification options, ensuring high reuse.

Easy Maintenance, High Safety: Well-organized layout inside the unit, clear maintenance pathways, fire protection, lightning protection, and misoperation prevention designs ensure reliable and safe operation.

Construction Not Weather-Dependent: Factory production is unaffected by rainy or winter seasons, resulting in a shorter installation period and more controllable project progress.

Usage Conditions

Ambient Temperature: -30°C to +40°C.

Altitude: ≤1000m.

Humidity: Daily average ≤ 95%, monthly average ≤ 90%.

Installation Environment: Outdoor environment free from severe vibration, corrosive gases, or flammable and explosive media.

Grid Conditions:50Hz/60Hz, suitable for 35kV and below AC power distribution systems.

Site Conditions: The foundation should be level, without long-term standing water, and with good ventilation.

Application

Prefabricated compartments are widely used in outdoor intelligent substations, photovoltaic and wind power substation transformers, energy storage stations, etc. They are also applicable for power supply in industrial parks, industrial and mining enterprises, as well as urban power grid renovations and temporary emergency power supply. They are particularly suitable for remote areas with inconvenient construction such as mountainous regions and islands, and can quickly achieve reliable power supply.

Model meaning

Technical Parameters

Overall and mounting dimensions(mm)（Reference）

Model meaning

QK-YZC Prefabricated Substation	Q:	Prefabricated (modular design)
	K:	Station (substation)
	Y:	Electrical equipment
	ZC:	Combined (compact design for easy installation)

Technical Parameters

Item	Specification
Rated Voltage	10 kV /11 kV / 20 kV / 33 kV / 35kV
Rated Frequency	50 Hz
Ambient Temperature	-25°C to +45°C
Installation Altitude	≤ 1000 m
Degree of Protection	Enclosure: IP54; Internal equipment: IP30 or above
Enclosure Material	Galvanized steel sheet with anti-corrosion coating / color-coated steel sheet
Seismic Resistance	≤ 8 degree (seismic intensity)
Earthing Resistance	≤ 4 Ω
Cooling Method	प्राकृतिक ventilation / air conditioning cooling
Fire Protection Rating	Class B or Class A
Application Scenarios	Outdoor installation, substations, energy storage systems, renewable energy power plants

Overall and mounting dimensions(mm)（Reference）

Prefabricated module dimension drawing

Custom Modular Box‑Type Substation Solutions for Your Project

(The values can be customized according to local project requirements.)

If you have specific requirements for the parameters, structure, or configuration of the modular box‑type substation, please contact us. Our team of account managers, technical engineers, and product consultants will assess your power distribution design, rated specifications, site conditions, installation environment, load characteristics, control needs, and project timeline to provide a tailored solution that perfectly matches your application scenario.

We can customize rated voltage levels (such as 10 kV, 11 kV, 20 kV or 35 kV), transformer capacity and type (dry‑type or oil‑immersed), medium‑voltage switchgear configuration, low‑voltage distribution panel layout, enclosure size and protection grade (e.g., IP54), monitoring and automation systems, auxiliary equipment, and other key design details to ensure safe, stable, and efficient performance of your power distribution system. The modular box‑type substation integrates medium voltage switchgear, transformers, and low‑voltage distribution devices into a compact, fully enclosed structure that is factory‑prefabricated and tested for rapid deployment on site, significantly reducing installation time and project costs.

This solution is ideal for urban distribution grids, industrial parks, commercial complexes, renewable energy power stations, mining sites, infrastructure projects, and other applications where space is limited, safety is critical, and reliable power transformation and distribution are required.

FAQ

What is a box‑type substation?

A box‑type substation (also called a compact or prefabricated substation) is a factory‑assembled power distribution unit that integrates high‑voltage switchgear, transformers, and low‑voltage distribution equipment into a fully enclosed steel structure. It combines power reception, voltage transformation, and distribution in one compact unit.

What components are typically included in a box‑type substation?

Typical components include medium‑voltage switchgear, a distribution transformer (oil‑immersed or dry‑type), low‑voltage distribution panels, protection devices, and sometimes reactive power compensation or control/monitoring equipment.

What are the advantages of a modular box‑type substation compared to a traditional brick‑and‑mortar substation?

Box‑type substations have a smaller footprint, faster installation, lower civil engineering cost, factory testing, and integrated protection and safety features. They can be installed quickly with minimal site preparation.

Where are box‑type substations commonly used?

They are widely used in urban power distribution networks, industrial facilities, residential communities, construction sites, mines, oil and gas fields, and renewable energy projects such as wind and solar farms.

What voltage levels can box‑type substations support?

Box‑type substations are typically designed for medium‑voltage distribution networks, commonly in ranges like 10 kV, 11 kV, and 35 kV, depending on system requirements.

Are box‑type substations suitable for outdoor installation?

Yes. The enclosure is often weatherproof, dustproof, and rust‑resistant, with proper protection ratings (such as IP54 or above), allowing them to operate safely outdoors in various environments.

What safety features are important in a box‑type substation?

Important safety features include dead‑front design with no exposed live parts, sealed enclosures, grounding systems, fireproof and heat‑insulating materials, and integrated protective relays to prevent faults and enhance reliability.

How does a box‑type substation handle power quality and distribution?

In addition to transformer and switchgear functions, box‑type substations may include power factor correction devices, protective relays, energy metering, and options for automation or SCADA monitoring, helping maintain power quality and efficient distribution.

What environmental conditions should be considered when installing a box‑type substation?

Considerations include ambient temperature range, altitude, humidity, ventilation, protection from contaminants, and ensuring the installation site is free from strong vibrations or corrosive gases.

Can a box‑type substation be customized for specific project needs?

Yes. Modular substations are often customized with different switchgear arrangements, transformer capacities, protection schemes, automation interfaces, and enclosure finishes to meet project‑specific requirements.

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