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American-style Box-Type Power Substation
American-style Box-Type Power Substation
This new American-style box-type power substation from our company serves as a vital power supply unit within cable distribution networks. Integrating high-voltage control, protection, transformation, and distribution functions into a compact, pre-assembled solution, it’s widely used in urban and rural power grids. Featuring an innovative design, the electrical substation box incorporates high-voltage load switches and fuses within the transformer oil, with options for combined or separate housing. The sealed tank includes a temperature gauge, oil level indicator, pressure gauge, pressure relief valve, and oil drain valve, ensuring continuous monitoring of transformer status. Available in ring network, terminal, and power supply configurations, it meets complex distribution needs with flexibility, offering standard, reinforced, and comprehensive enclosures to suit various applications.
Key Features:
American-style Box-Type power Substation are integrated prefabricated power distribution equipment with a compact structure and small footprint, allowing direct outdoor installation. They are fully prefabricated and tested in the factory, enabling fast on-site construction and convenient commissioning. With a fully sealed and maintenance-free design, they offer a high protection level and are suitable for harsh environments. Equipped with complete protection devices, they ensure safe and reliable operation. They can also be flexibly relocated, with low construction, operation, and maintenance costs, making them suitable for various power distribution scenarios.
Why choose an American-style box-type power substation
American-style Box-Type power Substation are compact pre-assembled equipment that integrates transformers, high and low voltage power distribution, and protection devices. They have significant advantages. They feature highly integrated structure, extremely small footprint, and eliminate the cumbersome infrastructure of traditional civil substations. They can be installed either against the wall or outdoors. The equipment is fully pre-assembled and debugged in the factory, and only needs to be positioned and wired on site. The construction period is significantly shortened, and the operation is efficient. The core components are fully sealed and maintenance-free, with low failure rates and low operation and maintenance costs. The box has a high protection level, resistant to sandstorms and humidity, and can operate stably in harsh environments. It also has a complete protection mechanism, is safe and reliable, and is convenient for lifting and relocation, with affordable costs. The overall cost performance is high, and it is suitable for various scenarios such as urban and rural power grids, temporary power supply, etc.
Product Advantages
Compact Structure: The compact structure reduces the footprint by approximately 1/3 to 1/5 compared to European-style box transformers, significantly saving space.
Fully Sealed and Insulated: The electrical substation features a fully sealed, fully insulated design with no need for insulation distance, ensuring reliable protection for personnel safety.
High Voltage Protection: The high-voltage side uses a combination of load switch and fuse for protection, supporting both ring network and terminal connections, ensuring flexible and reliable power supply.
Outstanding Transformer Performance: Low loss, low noise, and low temperature rise, with excellent overload, short-circuit, and impact resistance, ensuring long-term reliable operation.
Operating Conditions
Temperature: -35°C to +40°C.
Relative Humidity: Daily average ≤ 95%, monthly average ≤ 90%.
Altitude: ≤1000m.
Installation: Well-ventilated locations free from fire, explosion, corrosive gases, with ground inclination ≤3°.
Application
Suitable for fixed power distribution in urban residential communities, commercial complexes, industrial parks, etc.; also commonly used for municipal road lighting, temporary construction site electricity supply, renovation of old residential areas; it can also meet the needs of remote rural areas, outdoor stations, temporary emergency power supply, etc. where space is limited and quick power connection is required. Outdoor direct installation and flexible deployment are available.
Model meaning
Technical Parameters
Overall and mounting dimensions(mm)（Reference）
Model meaning
| ZGS11-Z/H-630/10 | Z: | Combined type |
| G: | High voltage | |
| S: | Three-phase oil-immersed transformer | |
| 11: | Transformer performance model (Model 11, Model 13 for energy-saving series) | |
| Z: | Vacuum switch / load switch | |
| H: | Ring main unit (RMU) | |
| 630: | Rated capacity 630 kVA | |
| 10: | Rated voltage 10kV (high voltage side) |
Technical Parameters
| Item | Specification |
|---|---|
| Rated Capacity | 250, 315, 400, 500, 630, 800, 1000, 1250, 1600 kVA |
| Rated Voltage | HV: 10 kV / 12 kV; LV: 0.4 kV |
| Rated Frequency | 50 Hz |
| Number of Phases | Three-phase |
| Vector Group | Dyn11 |
| Impedance Voltage | 4%–6% (depending on capacity) |
| HV Switching Device | Vacuum load switch with plug-in fuse |
| Degree of Protection | IP54 |
| Ambient Temperature | -30°C to +40°C |
| Insulating Oil | 25# naphthenic transformer oil |
| Cooling Method | ONAN (oil natural air natural) |
| Short-Circuit Withstand Current | 20 kA (2 s) |
| Enclosure Material | Galvanized steel sheet with outdoor powder coating |
| Installation Method | Outdoor installation |
Overall and mounting dimensions(mm)（Reference）
Custom American‑Style Box‑Type Power 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 American‑style box‑type power substation, please contact us. Our team of account managers, technical engineers, and product consultants will assess your power distribution design, rated specifications, installation environment, site conditions, and project timeline to provide a tailored solution that meets your unique application needs.
We can customize rated voltage levels, transformer type and capacity (such as oil‑immersed or dry‑type), medium‑voltage switchgear layout, low‑voltage distribution panel arrangement, enclosure materials and protection grade, HV/LV protection and control devices, auxiliary equipment (like reactive power compensation and metering systems), and other key design details to ensure reliable, safe, and efficient performance of your power distribution system. The American‑style box‑type power substation typically features a compact, integrated structure where key components such as the transformer, HV protection devices (fuses or load break switches), and LV distribution panel are housed efficiently together — offering a small footprint, flexible installation, and simplified wiring layout suitable for constrained sites.
American-style Box-Type Substations are often constructed with a fully sealed tank and integrated HV/LV modules, making them ideal for space‑limited settings, residential subdivisions, small commercial complexes, and utility distribution extensions where cost, ease of installation, and compact size are priorities.
This customized solution ensures you get a power distribution unit that fits both electrical requirements and site conditions, integrating seamlessly into local grid infrastructure while optimizing installation efficiency and long‑term operation.
FAQ
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