Product Overview
Intelligent Prefabricated Substation from a Professional Factory in China
The intelligent integrated YB-12 substation combines the high voltage switch equipment, distribution transformer and low voltage equipment into one complete factory assembled unit with all the systems working smoothly in closed mode. It has been installed in moisture, dust, rust, fire-proof and anti-theft steel and/or non-metal housing and is intended primarily for application in urban grid reconstruction, towns and cities, airports, railways, oil with temporary power plants.
Applications & circuit protection
The prefabricated substation is capable of providing power distribution services to various indoor as well as outdoor purposes.
- Modernizing the urban electrical network: Compact MV/LV distribution.
- Housing development: Dependable supply of electricity to communities.
- Industry and commerce: Manufacturing plants, hotels, shopping centers.
- Interim power supply: Construction and events.
Construction & operating reliability
A fully enclosed design that combines mechanical and electrical elements minimizes civil engineering and installation efforts as well as safeguarding the devices against adverse conditions.
- High voltage switchgear, transformer and low voltage switchboard integrated into one unit.
- Protection against moisture, rust, dust, rats, fire and theft.
- Full enclosure, mechanical and electrical integration.
- Indoor/outdoor and mobile versions.
- Pre-fabricated at the plant for quick installation on-site.
Technical Parameter
| Parameter | Value |
| Rated voltage | 10 / 0.4 kV (HV / LV) |
| Maximum operating voltage | 12 kV (HV side) |
| Rated frequency | 50 Hz |
| Rated capacity | 50-1600 kVA |
| 1-min power frequency withstand voltage | 35 kV |
| Lightning impulse voltage | 75 kV |
| Cooling method | Oil natural air natural (ONAN) |
| No-load regulation | ±5% / ±2×2.5% |
| Degree of protection | IP43 |
| Noise level | ≤50 dB |
| High-voltage rating | 6 / 10 / 12 / 24 / 35 kV |
| Low-voltage rating | 0.4 / 0.69 kV, customizable |
| Transformer capacity | 50 – 2500 kVA |
| HV rated current | 200 – 1250 A |
| LV rated current | 125 – 3150 A |
| Short-time thermal current | 12.5–31.5 kA (HV) / 15–50 kA (LV) |
| Protection level | IP33 or higher, customizable |
| Standard | IEC / GB 17467 |
Box Substation Cost & Factory Quote
The cost of a Prefabricated Substation is determined by the kVA rating, type of HV/LV switchgear and transformer and the types of enclosure selected. For an estimate, please provide the single-line diagram and the quantity you require.
- The quote covers the transformer, switchgear, and LV panel.
- Custom colours and brandings are offered at no extra cost.
- FOB/CIF/DDP options are available.
Substation Wiring & Site Connection
The fully assembled unit is delivered with the cables connected, wiring tested and functional. The site work includes running MV cable from the MV supply and LV cable to the distribution system. The factory wiring helps cut down the installation time.
- Wiring done at factory
- HV/LV cable entries installed according to the installation drawings
- Terminal for earthing system shown on the unit
Compare Substation Options
Choose the configuration that matches your site:
| Feature | This Unit | Alternative |
| Capacity | As specified | Other kVA ratings available |
| HV/LV | Per single-line diagram | Custom configuration |
| Enclosure | IP43 / IP54 | Indoor or outdoor layout |
| Application | Distribution / renewables | Utility, industrial or solar/wind |
Export Markets & Country Compatibility
The complete substations are shipped out to projects in Asia, Africa, Middle East, Latin America, and Pacific region. Each unit is custom-made according to the local grid requirements, voltage class, and installation parameters of its destination.
Substation Dimensions, Weight & Delivery
The overall size and weight of the substation depend on the type and arrangement of the units. For example, for a unit with capacity from 250 – 630 kVA with the size of 3000 – 5000 mm in length, 1500 – 2500 mm in width, and 1800 – 2600 mm in height one or several assembled modules are shipped.
- Overall dimensions confirmed with project drawings
- Transport-ready arrangements made for all segments
- Shipping and installation plans made
Standards & certifications
Made according to IEC / GB 17467 standard, the device is able to be issued type-test documents to be able to gain a project and grid approval.
- Built in conformity with IEC / GB 17467 regulations.
- Integrated substations are tested through implementation standards.
- The protective degree of the enclosure corresponds to the standards set.
- There is documentation for project approval.
OEM & B2B supply support
Being a leading power tool producer and factory source of supply Subian Electric provides assistance to developers, EPC contractors and distributors in supplying prefabricated substations and technical consultation services.
You should contact us if you have the details about your project requirements like voltage, capacity and other options.
- We can provide samples and technical designs.
- You can buy any amount of our products for your project.
- We can also provide OEM and ODM support.
- Custom packages and markings available.
- Technical documents and certifications can be provided for any project.
Frequently Asked Questions
What is a prefabricated substation?
The prefabricated substation comprises apparatus for high voltage switchgear, transformer and low-voltage distribution in a combined arrangement installed at a factory.
What are the available capacities?
The rating of the transformer varies in the range from 50kVA to 2500kVA depending on the high voltage suitability of the equipment with ratings ranging up to 6kV to 35kV
Can it be used outdoors?
Yes, the structure is known for its durability and protection against moisture, dust, corrosion, and meteorological conditions with the various features that it possesses.
Do you provide drawings and documentation?
Yes, you can get the technical drawings, type-tested reports, and approval documents.
