Pad-mounted Prefabricated Substation
Overview The YB-12/0.4（F·R）European Outdoor Prefabricated Substation is, in simple terms, a complete power distribution station built inside one weatherproof steel enclosure. It combines the high-voltage switchgear, the transformer, and the low-voltage switchgear into a single pre-assembled unit. Instead of building a separate substation room and installing HV switchgear, a transformer, and LV…
Overview
The YB-12/0.4（F·R）European Outdoor Prefabricated Substation is, in simple terms, a complete power distribution station built inside one weatherproof steel enclosure. It combines the high-voltage switchgear, the transformer, and the low-voltage switchgear into a single pre-assembled unit.
Instead of building a separate substation room and installing HV switchgear, a transformer, and LV switchgear separately on site, buyers simply have the unit delivered, connect the incoming and outgoing cables, and it’s ready to run. It steps 10kV high voltage down to 380V/220V low voltage that factories, construction sites, and residential/commercial developments can use directly. This “all-in-one box” approach is a standard practice across Europe for outdoor power distribution, which is why it’s commonly known as a “European-style compact substation.”
Typical Applications
• Real estate & municipal projects: Temporary or permanent power supply for residential complexes, office buildings, and commercial developments — replacing traditional brick-and-mortar substation rooms and cutting construction time.
• Industrial parks & factories: Fast grid connection for new plants or production line expansions, especially useful for phased construction where power points need to be relocated more than once.
• Wind & solar farms: Used as step-up/step-down stations at outdoor generation sites with no shelter, built to withstand direct sun and rain exposure.
• Construction site temporary power: Once a project finishes, the whole unit can be lifted and relocated to the next site — high reuse value.
• Mines, ports, and terminals: Environments with heavy dust and humidity that need higher-protection outdoor equipment.
• Roads, metro, and airport infrastructure: Distributed installation points that reduce cable-run length.
What these scenarios have in common: scattered power demand points, limited civil works budget/timeline, and a need for fast installation with outdoor protection — exactly where a prefabricated substation outperforms a traditional substation building.
Core Functions
1. Integrated HV/LV design: HV incoming cabinet, transformer, and LV outgoing cabinet are combined and factory-wired/tested as one unit — on-site work is limited to cable connection.
2. Outdoor-rated enclosure: Rain-proof, dust-proof, sun-resistant, and corrosion-resistant construction designed for open-air installation without a civil works shelter.
3. Flexible HV configuration: Multiple main circuit schemes are available (cable/overhead incoming, single-outlet/multi-outlet, etc.) to match different site wiring requirements.
4. Optional metering & protection: PT/CT metering, surge arresters, fuse protection, and live display indicators can be added on request.
5. Small footprint: Significantly less land use and shorter construction lead time compared with a traditional substation room, ideal for space-constrained sites.
6. Fully transportable, reusable: Once a temporary project ends, the entire unit can be lifted and relocated for reuse — lowering long-term equipment cost.
OEM / ODM Support
We support both OEM (private label) and ODM (custom design) production:
• Enclosure appearance, nameplate, and branding can be customized to your specifications.
• The HV main circuit scheme can be adjusted to match your local grid standards (incoming/outgoing method, metering approach, protection configuration).
• Transformer capacity and number of LV outgoing circuits can be configured to project requirements.
• Custom production based on customer-supplied drawings or technical specifications is supported.
• We can coordinate test reports and documentation to support your local certification process (exact scope subject to discussion).
Load Switch Technical Parameters
| Item | Unit | FKN12-12 Load switch | FZN25-12 Vacuum load switch |
| Rated voltage | kv | 10 | |
| Maximum operating voltage | kv | 12 | |
| Rated frequency | Hz | 50 | |
| Rated current | A | 630 | |
| Rated breaking load current | A | 630 | |
| Thermal stability current (RMS) | kA/S | 20/2 | 20/4 |
| Dynamic stability current | kA | 50 | 50 |
| Short-circuit shutdown current (peak) | kA | 50 | 50 |
| Number of full-load breaks | times | 20 | 10000 |
| Mechanical life | times | 2000 | 10000 |
| 1min Industrial frequency withstand voltage (phase-to-phase and earth-to-earth) | kv | 42 | 42 |
| Lightning impulse voltage (phase-to-phase and earth-to-earth) | kv | 75 | 75 |
High-voltage fuse technical parameters
| Models | Rated voltage (kv) | Breaking current (A) | Breaking current (kA) | Rated current of the melt (A) | |
| UK Models | Domestic Model | ||||
| SDL※J | XRNT-12 | 12 | 40 | 31.5 | 6.3,10,16,20,25,31.5,40 |
| SFL※J | XRNT-12 | 12 | 100 | 31.5 | 50,63,71,80,100 |
| SKL※J | XRNT-12 | 12 | 125 | 31.5 | 125 |
| Note: Determined by whether or not an impinger is installed, N is without an impinger, A is with an impinger. | |||||
| Model | Form of disconnectors | Tripper rated current A | Throughput capacity kA (AC380V) | |
| DW15-630 | Thermal one solenoidal or electronic type | 315,400,630 | 40 | |
| DW15-1000 | Thermal one solenoidal or electronic type | 630,800,1000 | 50 | |
| DW15-1600 | Thermal one solenoidal or electronic type | 1600 | 50 | |
| DW15-2500 | Thermal one solenoidal or electronic type | 1600,2000,2500 | 60 | |
| CW1-2000 | Intelligent type | 630,800,1000,1250,1600,2000 | 65(80) | |
| CW1-3200 | Intelligent type | 2000,2500,3200 | 100 | |
| Note: (80) is a polymer break type. | ||||
Technical programme legend
| Programme number | 1 | 2 | 3 | |
| Main circuit single line diagram |  |
 |
 |
|
| Purpose | Terminated Cable Inlet/One Outlet | Terminal type (inverted) inlet | Terminated overhead feeder | |
| Cabinet type | HXGN-12 | HXGN-12 | HXGN-12 | |
| Primary equipment selection | Vacuum circuit breaker VS1, ZN28 | |||
| Load switch FN, FZN, FLN | 1 | 1 | 1 | |
| Disconnecting switch GN | ||||
| Fuse XRNT | 3 | 3 | 3 | |
| Fuse RN2 | ||||
| Surge arrester HY5W | 3 | 3 | 3 | |
| Powered display GSN | 1 | 1 | 1 | |
| Current transformer LZZBJ | ||||
| Voltage transformer JDZ | ||||
| Programme number | 4 | 5 | 6 | |
| Main circuit single line diagram |  |
 |
 |
|
| Purpose | Terminal type vacuum circuit breaker feeder | Terminal type incoming metering one outgoing | Terminal Type Cable Inlet\One Outlet\Metering | |
| Cabinet type | XGN66-12 | HXGN-12 | HXGN-12 | |
| Primary equipment selection | Vacuum circuit breaker VS1, ZN28 | 1 | ||
| Load switch FN, FZN, FLN | 1 | 1 | ||
| Disconnecting switch GN | 2 | |||
| Fuse XRNT | 3 | 3 | ||
| Fuse RN2 | 3 | 3 | ||
| Surge arrester HY5W | 3 | 3 | 3 | |
| Powered display GSN | 1 | 1 | 1 | |
| Current transformer LZZBJ | 2 | 2 | 2 | |
| Voltage transformer JDZ | 2 | 2 | ||
| Programme number | 7 | 8 | 9 | |
| Main circuit single line diagram |  |
 |
 |
|
| Purpose | Terminal type incoming metering\PT\One outgoing | Terminal type one inlet\metering\one outlet | Terminal Type Circuit Breaker Inlet/Metering | |
| Cabinet type | HXGN-12 | HXGN-12 | XGN66-12 | |
| Primary equipment selection | Vacuum circuit breaker VS1, ZN28 | 1 | ||
| Load switch FN, FZN, FLN | 1 | 2 | ||
| Disconnecting switch GN | 1 | 2 | ||
| Fuse XRNT | 3 | 3 | 3 | |
| Fuse RN2 | 3 | 3 | 3 | |
| Surge arrester HY5W | 3 | 3 | 3 | |
| Powered display GSN | 1 | 1 | 1 | |
| Current transformer LZZBJ | 2 | 2 | 4 | |
| Voltage transformer JDZ | 2 | 2 | 2 | |
| Programme number | 10 | 11 | 12 | |
| Main circuit single line diagram |  |
 |
 |
|
| Purpose | Terminal type circuit breaker inlet/PT/one outlet | Terminal type one inlet/two outlets | Terminal type inbound metering/two outbound | |
| Cabinet type | XGN66-12HXGN-12 | HXGN-12 | HXGN-12 | |
| Primary equipment selection | Vacuum circuit breaker VS1, ZN28 | 1 | ||
| Load switch FN, FZN, FLN | 1 | 3 | 2 | |
| Disconnecting switch GN | 3 | 1 | ||
| Fuse XRNT | 3 | 6 | 6 | |
| Fuse RN2 | 3 | 3 | ||
| Surge arrester HY5W | 3 | 3 | 3 | |
| Powered display GSN | 1 | 1 | 1 | |
| Current transformer LZZBJ | 2 | 2 | 2 | |
| Voltage transformer JDZ | 2 | 2 | ||
FAQ
Can this unit be installed directly outdoors without a shelter?
Yes. The enclosure is purpose-built for outdoor installation, with rain, dust, and sun protection — this is its main advantage over indoor-rated switchgear.
What’s the typical lead time?
Lead time depends on transformer capacity, HV scheme configuration, and order quantity. Please share your project requirements so our engineers can confirm.
Can the wiring scheme be customized to our local grid standard?
Yes. Multiple main circuit schemes are available, and our engineers can design a custom configuration based on your local grid standard and site conditions.
What’s the minimum order quantity?
We support single-unit orders for individual projects as well as bulk trade orders. Please confirm MOQ with our sales team based on your specific needs.
Does the product meet European certification standards?
Certification scope depends on the exact configuration and your country’s requirements. Please share your certification needs and we’ll confirm what documentation is available.
Can the substation be relocated to a different project later?
Yes — this is one of the key advantages of a prefabricated substation over a fixed substation building. The enclosure and internal layout are designed to support full-unit lifting and relocation.
Do you offer OEM private-label production?
Yes. Enclosure branding, nameplates, and other details can be customized — happy to discuss specifics before you place an order.
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