China Suppliers for 11kV Compact Substation 1000kVA Prefabricated Box-Type Substation from Factory
Model meaning
Conditions of use
- Altitude: ≤1000m;
- Ambient temperature: upper limit of ambient air temperature +40℃, lower limit -15℃;
- Relative humidity: The daily average relative humidity shall not exceed 95%; monthly average relative humidity shall not exceed 90%;
- Installation location: in places without fire, explosion hazard, conductive dust, chemical corrosive gas and severe vibration;
- When the above normal service conditions cannot meet the usage requirements, the user shall negotiate with the manufacturer.
Product characteristics
The basic structure of the substation is classified into “目” and “品” shapes. The box framework is welded with high-quality channel steel and angle steel, with high mechanical strength. The box is made of aluminum alloy profiles, which have good anti-corrosion ability. The overall beautiful appearance can be coordinated with the surrounding environment through painting and coloring. The carefully designed bottom lifting device provides great convenience for installation, transportation and movement.
There are independent high-voltage room, transformer room and low-voltage room inside the substation, and the lighting in each room automatically opens with the opening of the door. The high-voltage room is equipped with high-voltage ring main unit, which can be selected as compressed air type or vacuum load switch according to user needs, and it also has the "five prevention" function. When current-limiting high-voltage fuse is used, if a phase fuse is blown, the load switch will automatically open, avoiding faults caused by phase loss operation.
The transformer room adopts natural ventilation and automatic control forced cooling device, with exhaust system that automatically controls with temperature changes, which can effectively control and reduce the temperature inside the box to meet operational requirement. According to user requirements, anti-condensation device can also be used, which can be easily accessed from both sides of the transformer room through the door along the track. The box material can prevent rainwater and dirt from entering, and has the conditions for long-term outdoor use, ensuring anti-corrosion, waterproof and dustproof performance, long service life, simple maintenance, as well as beautiful appearance.
① Transformers can be dry-type or oil immersed type.
② The low voltage room has the overall function of low-voltage switchgear, which can be selected and combined by users at will.
③ Outer shell material: including composite plate, stainless steel composite plate, aluminum zinc plated plate, stainless steel plate and metal carved plate.
④ Structural feature: The high-voltage structure is reasonable and compact, and HXGN17 and XGN15 ring main units can be selected, all of which have five prevention interlocking functions. The natural ventilation and automatic ventilation cooling system for transformer can be applied to dry-type and oil-type transformers.
⑤ Low voltage room: Multiple structural distribution solutions can be adopted according to user requirements, including power distribution, lighting distribution, reactive power automatic compensation, energy metering and other functions, and it's equipped with an automatic lighting system.
Substation performance parameter
| No. | Item | Unit | Parameter |
| High voltage unit | Rated frequency | Hz | 50 |
| Rated voltage | kV | 7.2、12 | |
| Rated current | A | 400、630 | |
| Transfer current | A | 1200~3150 | |
| Power frequency withstand voltage (phase-ground, phase-phase/isolating distance) | kV | 42/48 | |
| Lightning impulse withstand voltage (phase-ground, phase-phase/isolating distance) | kV | 75/85 | |
| Rated short-circuit breaking current (current-limiting fuse) | kA | 31.5 | |
| Rated capacity | kVA | 30~2000 | |
| Tap range | ±2x2.5%、±5% | ||
| Transformer unit | Connecting group | % | YynO、Dyn11 |
| Impedance voltage | % | 4、4.5 | |
| Low voltage unit | Rated voltage | V | 220、380 |
| Rated current of main circuit | A | 50~4000 | |
| Branch current | A | 5~800 | |
| Outer shell | Protection level (conventional product) | IP33D | |
| Noise level | db | ≤50 |
Substation layout plan
Basic drawing and layout plan
Frequently Asked Questions (FAQ)
What are the standard ambient conditions for operating this substation?
The substation is designed for altitudes up to 1000 meters, with ambient temperatures ranging from a high of +40℃ to a low of -15℃. Daily relative humidity should not exceed 95% (monthly average ≤ 90%), and the installation site must be free from fire hazards, conductive dust, explosive risks, and severe vibrations.
What types of transformers can be installed inside the unit?
The substation is highly versatile and accommodates both dry-type and oil-immersed transformers to suit different application layouts and operational requirements.
How is the cooling and ventilation system inside the transformer room controlled?
It utilizes a combination of natural ventilation and an automatic control forced cooling system. The exhaust system automatically starts or stops based on internal temperature changes to ensure safe operating conditions.
What safety features are integrated into the high-voltage room?
The high-voltage room features a ring main unit equipped with a complete "five prevention" interlocking function. Additionally, the load switch automatically opens if a phase fuse blows, preventing phase loss faults.
What materials are available for the substation's outer shell?
Depending on the project requirements, the outer shell can be made of composite plate, stainless steel composite plate, aluminum zinc plated plate, stainless steel plate, or metal carved plate for enhanced durability and environmental protection.