Products
PV Pad Mounted Transformer Substation
Cotenele is a well-known electrical equipment manufacturer in China, and our PV Pad Mounted Transformer Substation have reliable quality and stable operation. Chinese style box-type station is a prefabricated substation for wind or photovoltaic power generation, which integrates step-up transformers, high-voltage fuses, load switches, low-voltage switchgear, and corresponding auxiliary supporting equipment. The capacity range is 500-6800KVA, and the voltage level is 11KV-33KV. It is suitable for various onshore and offshore photovoltaic and wind power plants.
Cotenele is an important supplier for solar power plant and wind power plant, the PV Pad Mounted Transformer Substation (also referred to as Chinese style box-type substation or simply Chinese substation) is a locally developed prefabricated substation in China. It combines the compact size of American-style pad-mounted substations with the ability to achieve automated configuration found in European-style substations, thus creating a distinctive Chinese product. Chinese style compact substations are widely used in renewable energy projects, especially in photovoltaic (PV) and wind power generation, as the key step‑up equipment connecting renewable energy generators to the grid. The core difference of Chinese-style Solar Power substations from both American and European types substations is that the transformer is placed outside the enclosure, which effectively solves the transformer heat-dissipation problem. This design gives it a significant advantage in new-energy applications, and it is now increasingly adopted in wind farms and PV plants.
Operating Conditions
The normal operating conditions for Huashi compact substations are as follows:
1. Altitude: Not exceeding 1,000m (above that, high-altitude design is required); some products can reach 3,000 m or even 5,000 m.
2. Ambient temperature: -30°C to +45°C; wide-temperature versions can operate from -40°C to +42°C.
3. Outdoor wind speed: Not exceeding 35 m/s.
4. Humidity: Daily average relative humidity ≤ 95%; monthly average ≤ 90%.
Main Technical Parameters
The main technical parameters of a typical Chinese style compact substation are:
| Parameter | Typical value |
| Medium-voltage side rated voltage | 10 kV, 20 kV, 35 kV (maximum working voltage 40.5 kV) |
| Low-voltage side rated voltage | 0.4 kV, 0.69 kV, 0.8 kV, 1.14 kV |
| Rated capacity | 630 kVA – 9,000 kVA (standard); up to 20,000 KVA available |
| Rated frequency | 50 Hz / 60 Hz |
| Number of phases | 3 |
| Enclosure protection class | IP54 / IP65 |
| Cooling method | Oil-immersed, self-cooled |
Values vary by manufacturer and model; the above are typical ranges.
Product Features
1. Compact structure: No separate transformer room; for the same capacity, footprint is only about 58% of a European-style substation.
2. Efficient heat dissipation: Transformer is exposed and relies on natural air convection; eliminates fan failure risks associated with forced-air cooling.
3. Modular design: Independent functional units, easy transport, and fast on-site installation.
4. Safe and reliable: All live parts are fully sealed against dust and moisture; high-voltage side equipped with reliable protection.
5. Easy maintenance: Transformer is accessible externally; no need to open the entire enclosure for inspection, greatly improving maintenance efficiency.
6. Intelligent: Can be equipped with microcomputer-based integrated automation for "four-remote" functions (telemetry, telesignalling, telecontrol, and teleadjustment).
7. Strong weather resistance: Multi-layer anti-corrosion design; adapts to extreme temperatures, high winds, and high altitudes.
8. Energy-efficient: Uses high-quality transformers; energy losses are about 15% lower than European-style substations.
Product Advantages
1. Cost advantage: Overall cost is lower than European-style units, with less copper and other materials used, reducing user investment. Chinese box-type substations are more compact and cost‑effective than European-style ones.
2. Thermal advantage: The externally mounted transformer makes full use of natural air convection, providing better heat dissipation than European-style designs.
3. Maintenance advantage: Compared with American‑style substations, Chinese box-type substations are much easier to inspect and maintain. The medium-voltage side is equipped with an earthing switch that is mechanically interlocked with the main switch, ensuring operator safety during maintenance.
4. Protection advantage: A single fuse per phase is used instead of the two fuses in American-style substations. When any phase fuse blows, the load switch trips to cut off the power. Additionally, earthing switches and surge arresters are added — features not found in American-style units.
5. Strong adaptability: High system integrity; particularly suitable for large-capacity applications that require regular maintenance.
6. Size advantage: Compact layout and small footprint — intermediate between American and European types.
Differences Between Chinese-style, European-Style, and American-Style Substations
| Aspect | European-style | American-style | Chinese-style |
| Structural layout | Medium-/low-voltage switchgear + transformer all inside one enclosure | Load switch and fuses simplified and placed inside the transformer tank | Transformer mounted outside the enclosure; compartments (MV, LV) are independent |
| Transformer location | Inside the enclosure | Integrated inside the tank (also inside the enclosure) | External, closely attached via side-exit connections |
| Medium-voltage side configuration | Load break switch + current-limiting fuse or circuit breaker | Fuse protection only (load switch is for switching, not protection) | Air-insulated ring-main unit; one fuse per phase plus earthing switch and surge arrester |
| Transformer type | Primarily dry-type | Oil-immersed | Oil-immersed |
| Footprint/Size | Largest | Smallest (about 1/3 of European-style) | Intermediate — smaller than European, larger than American |
| Protection features | Over-temperature trip for dry-type; fuse or breaker protection | Fuse protection; no earthing switch or arrester | Each phase fuse triggers load switch trip; earthing switch with mechanical interlock; surge arrester included |
| Heat dissipation | Relatively poor (inside enclosure) | Good (oil-immersed, but still enclosed) | Best — transformer exposed to natural air convection |
| Cost | Highest | Lower | Intermediate — lower than European-style |
| Typical applications | Multi-storey residential, high-rise buildings, reliability-critical sites | Urban street lighting, temporary construction, some PV/wind | Wind farms, PV plants, large-capacity renewable projects, remote areas |
Project Sites
Project site 1
Project site 2
Project site 3
Project site 4
Project site 5
Products Shows
Hot Tags: PV Pad Mounted Transformer Substation, China, Manufacturer, Supplier, Factory
Send Inquiry
Contact Info
-
Address
Building 2, Changhong Industrial Park, No. 501 Liule Road, Liushi Town, Yueqing City, Wenzhou City, Zhejiang Province, China
-
Tel
-
E-mail
Mobile/WhatsApp:
