Your Professional Transformer Substation Supplier
Zhejiang GangHeng Electric Co., Ltd., founded in 2004, is a manufacturer of high- and low-voltage switchgear and transformers. Our team covers R&D, production, and quality control, with stable technical staff and experienced engineers. The factory is located in Jiangshan City, Zhejiang, in a major transport hub that supports fast delivery. We operate modern production lines with CNC punching, CNC bending, and laser cutting machines, along with dedicated copper busbar and testing equipment.
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The Pad Mounted Substation is the first generation of domestically produced American-style box-type substations launched by our company. As an important power supply unit in -
Application Scope: Suitable for 50Hz, 6-10kV grids with rated capacities ranging from 50 to 1600kVA. Widely applied in various settings such as high-rise buildings, residential
Why choose us
Certifications
We are ISO9001、 ISO14001 、OHSAS18001、CQC product certification, high-voltage cabinet type test report and various patent certificates, etc.
Production Market
Our The products are sold to various provinces across the country as well as to countries such as Iran, Kyrgyzstan, Zimbabwe, and Tanzania
Custom Solutions
We offer tailored solutions for OEM/ODM projects. Whether adapting our switchgear or transformers for specific needs, our CNC production equipment ensures precise customization.
After-Sales Support & Warranty
We stand behind our products with a 1-year free warranty and 5-year latent defect coverage, ensuring long-term reliability. In case of technical issues, we provide on-site support and take full responsibility for any technical guidance errors, giving customers peace of mind throughout the product's lifecycle.
Prefabricated Substation
A prefabricated substation, also known as a box-type substation or compact substation, is a highly integrated power distribution unit designed to deliver electricity directly to end users. It combines high-voltage switchgear (HV room), a distribution transformer (transformer room), and low-voltage distribution equipment (LV room) into a single, fully enclosed, factory-assembled steel structure.
|
Item |
Unit |
High voltage |
Transformer |
Low voltage |
|
Rated frequency |
Hz |
50 |
||
|
Rated capacity |
KVA |
10 |
30-2500 |
0.4 |
|
Rated voltage |
KV |
400630 |
50-2500 |
|
|
Rated current |
KA |
12.2 (2s or 4s） |
15(1s) |
|
|
Rated short-time withstand current |
KA |
42/48 |
||
|
Power frequency withstand current |
KV |
75/85 |
||
|
Lightning impulse withstand voltage |
KV |
75 |
||
|
Tapping link range |
KV |
Ip33 |
±2*2.5% |
Ip33 |
|
Protection class |
KA |
Ip23 |
||
|
Sound level |
dB |
50 |
Functions of Prefabricated Substation
Power transformation: One of the primary functions is to transform high voltage electricity to low voltage electricity so that it can be safely used. It is equipped with a transformer that alters with the voltage needs of the distribution network.
Power distribution: A prefabricated power substation assists in the optimal distribution of electricity to different regions. It enables electricity to flow to residential houses, industrial factories, and commercial buildings without interruption.
Safety and Protection: These components include the switchgear and circuit breakers, which protect against electrical faults like overloads and short circuits. These safety measures reduce the risk of electrical accidents among people and the equipment being used.
Dependable Functioning Under Diverse Conditions: The enclosed structure protects electrical parts from dust, moisture, and severe weather so that these components can function in various conditions.
Compact Design: Being compact, it can be placed in both urban and remote settings. This makes it ideal for regions experiencing a rapid growth in electricity demand.
Simple and Fast Assembly and Installation: Because it comes preassembled, it can be erected faster than traditional substations. This ensures that industries and businesses do not have to wait for power solutions for long periods of time.
Compact and Space-Saving Design: With a capacity three times larger than conventional substations, these prefabricated unit substations drastically reduce the footprint. These are very useful in areas that are heavily populated and have space constraints.
Fully Sealed and Insulated: Their design greatly reduces the possibility of power interruptions because prefabricated substations are fully sealed and insulated. A distance for additional insulation is not required, which means personal safety is also greatly assured.
Substation Features: Substations can be integrated into multiple power supply systems such as ring network power supply, dual power supply, or terminal power supply systems. This allows for greater flexibility in power distribution.
Reducing the effect of sunlight radiation: Double-layered thermal insulation structure of these substations protects the internal components from harmful sunrays. Moreover, there are some ventilation holes in the structure to dissipate heat.
Safety
These substations are safer due to double fuse protection with dual sensitive fuses, which respond to temperature as well as current, reducing operational expenses.
Durability
The protective enclosure of the substations is robust, which enhances the durability of the structure while preventing internal components from dust, moisture, and extreme weather conditions.
Cost and time-effective
The modular design of these substations makes them easier to install due to minimal site work during installation. This leads to lower labor costs and shorter project timelines.
Type of Prefabricated Substation
Compact Substations: Compact substations are small and completely sealed units created to fit in confined places. They find applications in urban areas, shopping malls or industrial plants. Compact substations accept voltages within the range of 11 kV to 36 kV and are relatively simple to install.
Underground Substations: These substations are below ground level either for space saving or aesthetics. They are most suited for highly populated and urbanized areas or places with aesthetic appeal. The components, including transformers and switchgear, are built for operational underground environments. Additionally, there are cooling and ventilation systems for safe use.
Mobile Substations: You can transport these mobile substations easily by mounting them on trailers or skid platforms. They are best for temporary supply of electricity in cases of disturbance, maintenance, or construction works. These units can withstand voltages from 11 kV up to 132 kV and are special regarding rapid deployment and execution.
Renewable Energy Substations: These are particularly used to connect renewable energy sources such as wind farms or solar plants to the grid table. These substations often include better control systems to manage such variations in energy outputs. They can handle the load voltages of 66 kV and above.
Pad-mounted substation: A pad-mounted substation is another type of installed substation which is pre-fabricated, usually used in urban or suburban areas. Such types of substations are placed on concrete pads. They normally cater to residential or light commercial use.
Applications of Prefabricated Substation
Power Distribution in Cities
For residential and commercial areas in urban regions, power distribution is made effortless by means of prefab substations.
Industrial Facilities
Sustained power provision is necessary for warehouses, factories, and manufacturing plants to allow the use of machinery and power workstations. So, industrial facilities make efficient use of prefab substations as they are able to handle high-power loads.
Construction Sites
Lighting, power tools, and heavy-duty equipment all require power while construction projects are ongoing. For this reason, prefab substations are ideal as they are mobile and can be used at various locations.
Renewable Energy Projects
These substations play a key role in connecting solar farms and wind power plants with the rest of the power grid. Controlling the smooth flow of energy transmission alongside handling fluctuating power outputs makes these substations essential to renewable energy infrastructure.
Railways and Metro Systems
The substations are prefabricated for power supply to metro networks, railway stations and tram systems, which require power for trains, signalling, and operations around the station. Their small form factor enables them to be mounted in underground or metropolitan locations.
Mining Operations
The remote and harsh environments of the operating mines are provided with reliable and robust power from the prefabricated substations mounted close to them. Substations of this type are constructed to endure dust and moisture along with very high and low temperatures.
Oil and Gas Industry
Oil and gas offshore platforms and onshore drilling locations need an energized power solution that is safe and explosion-proof at the same time. Prefabricated substations provide continuous, uninterrupted power to these areas of high risk while observing all security requirements.
Components of Prefabricated Substation
Transformer: Central to the substation is the transformer, which alters the voltage by changing high voltage to low voltage and vice versa, depending on what is needed within the system at the particular time.
Switchgear: Switchgear also controls electric flow through the use of circuit breakers and disconnect switches to manage and shield the system from short circuits and overloading power.
Protection Devices: In order to maintain safety within the substation system, relays and surge protectors are used in order to avert damages from unexpected electrical jolts or defaults, help to keep constant operation, and ensure electrical substation equipment are safe.
Control Panel: The control panel oversees the management and supervision of the substation. It contains sets of functions that operators can check power levels and troubleshoot any functions.
Enclosure: The system is fully assembled in a strong enclosure that protects it from weather, dust, and other external damage. It ensures that all components are well-guarded and can allow the substation to work efficiently in various environments.
Busbars and Cables: Busbars are metal strips that serve as the main/distribution power supply lines within a substation. Cables link the substation to external power lines and facilitate the smooth flow of electric power.
Cooling System: Due to the heating effect of transformers, a cooling system is adopted in order to manage heat loads. Doing so conserves efficiency while helping to prolong equipment wear and tear.
Working Principle of Prefabricated Substation
Electricity intake: An electric substation processes current ranging from a range of volts between 11 kV and 132 kV. Moreover, it depends on the provider's source. Higher voltage ensures less energy loss during transmission.
Voltage Transformation: A transformer does both transformations in a single unit or component. For instance, a 33 kV may be reduced up to 11 kV or 400 volts for local distribution. This is to say that the transmission is of a range level suitable for household, office or industrial usage.
Operational Management and Protection: Such systems require switchgear and circuit breakers for their operation and protection. Short circuit breakers are capable of interrupting fault currents for instance 50 kA. That way, it shields all components and containment losses thereafter.
Electricity Routing: Busbar distribution units ensure electricity is routed. These types of conductors transmit currents generally not exceeding 5000 Amperes. It mostly depends on the design of the substation. After this, wires and cables come into the field to apportion electricity to different consumers or systems.
Monitoring: The control panel monitors the machine for any voltage, current, and temperature abnormalities that might occur.
Cooling: You know every transformer produces heat and more so when the load is high. The cooling systems installed ensure that the operational temperatures are at safe levels. Keep in mind that typically a transformer can handle a load of about 1MVA to 50MVA.
Certificates
FAQ
As one of the most reliable transformer substation manufacturers and suppliers in China, we cover all costs, risks, and your direct expenses. Please feel free to buy high quality transformer substation at competitive price from our factory. Customized orders are welcome.
insulation substation, pad mounted substation, prefabricated substation