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High Protection 35kV Prefabricated Substation - China Suppliers & Factory for Mining Special Explosion-Proof Solutions
Product Features
1. Wide Temperature Range Stable Operation Guarantee: The product has undergone strict thermal design verification, ensuring stable performance from the extremely cold winter at -10°C to the extremely hot summer at +40°C. Key components are selected from products with wide temperature ranges, and the box body uses special insulation materials and a ventilation cooling system to effectively cope with a solar radiation heat load of 1000W/m², preventing excessive internal temperature from affecting the equipment lifespan.
2. Strengthening Structure to Withstand Extreme Weather: The box structure is made of high-strength frames and weather-resistant steel plates. After calculation, it can withstand a wind pressure load of 35m/s (equivalent to a typhoon of level 12). The special design of the top cover can effectively drain rainwater and resist the additional load caused by 20mm of ice accumulation. All door gaps and interface areas are treated with multi-layer sealing, with a protection level of above IP54, ensuring the safe operation of internal equipment in a humid and rainy environment.
3. Verification in High-Altitude and High-Humidity Environments: The electrical insulation design fully takes into account the impact of thin air at an altitude of 1000 meters, leaving sufficient safety margin. For the humid environment, an automatic temperature and humidity control system is equipped inside the box. When the humidity exceeds the set value, the heating dehumidification device will automatically start, ensuring that under harsh conditions with an average monthly relative humidity of ≤90% and an average daily humidity of ≤95%, no condensation occurs on the internal components, and the insulation performance remains reliable at all times.
4. Seismic Design and Safety Redundancy: The overall structure is designed in accordance with the 8-degree seismic resistance requirements. Flexible connections and vibration reduction measures are adopted to ensure that the main equipment is not structurally damaged during an earthquake, and to maximize the continuity of power supply. This feature makes it particularly suitable for power grid construction in areas prone to earthquakes.
Operating Environment
General Conditions
- • Ambient air temperature: -10°C to 40°C
- • Solar radiation: ≤ 1000W/m²
- • Sea depth: ≤ 1000m
- • Ice coverage: ≤ 20mm
- • Wind speed: ≤ 35 m/s
- • Earthquake intensity: ≤ 8 degrees
- • No risk of fire, explosion, severe pollution, chemical corrosion or severe vibration
Temperature & Humidity
- • Daily average relative humidity: ≤ 95%
- • Monthly average relative humidity: ≤ 90%
- • Daily average relative water vapor pressure: ≤ 2.2kPa
- • Monthly average relative water vapor pressure: ≤ 1.8kPa
Note: Special usage conditions. When placing an order, please discuss with the manufacturer for resolution.
Product Specifications
| Name | Unit | High-voltage electrical cabinet | Transformer | Low-voltage electrical cabinet |
| Nominal voltage | KV | 10 | 10/0.4 | 0.4 |
| Rated current | A | 630 | — | 100~2500 |
| Rated frequency | Hz | 50 | 50 | 50 |
| Rated capacity | KVA | — | 100~1250 | — |
| Rated thermal stability current | kA | 20/4S | — | 30/15 |
| Rated dynamic stable current (peak) | kA | 50 | — | 63 |
| Rated closing short-circuit current (peak) | kA | 50 | — | 15~30 |
| Rated breaking short-circuit current | kA | 31.5 | — | — |
| Rated starting load current | A | 630 | — | — |
| 1min power frequency withstand voltage | kA | Intergranular 42 fracture surfaces between 48 layers | 35/28 (5min) | 20/2.5 |
| Lightning impulse withstand voltage | kA | Intergranular 42 fracture surfaces between 48 layers | 75 | — |
| Shell protection grade | — | IP23 | IP23 | IP23 |
| Noise level | dB | — | Oil transformer <55、Dry transformer ≤65 | — |
| Loop number | Amount | 1~6 | — | 4~30 |
| Maximum reactive power compensation on the low-voltage side | kvar | — | — | 300 |
Detail Pictures
Frequently Asked Questions
What temperature range can the Box-Type Transformer operate in?
The Box-Type Transformer is designed for stable operation across a wide temperature range of -10°C to +40°C. Its thermal design, special insulation materials, and ventilation cooling system allow it to handle solar radiation heat loads up to 1000W/m² without affecting equipment lifespan.
What is the IP protection rating of this Box-Type Transformer?
The shell protection grade of the high-voltage electrical cabinet, transformer, and low-voltage electrical cabinet is IP23. Additionally, all door gaps and interface areas are treated with multi-layer sealing, achieving an overall protection level of above IP54 to ensure safe operation in humid and rainy environments.
Can this transformer withstand extreme wind and weather conditions?
Yes. The box structure is built with high-strength frames and weather-resistant steel plates capable of withstanding wind pressure loads of up to 35m/s (equivalent to a Level 12 typhoon). The specially designed top cover effectively drains rainwater and resists additional loads caused by up to 20mm of ice accumulation.
Is this transformer suitable for high-altitude and high-humidity installations?
Yes. The electrical insulation design accounts for thin-air conditions at altitudes up to 1000 meters. An automatic temperature and humidity control system inside the box activates heating dehumidification when humidity exceeds set values, ensuring no condensation occurs even at monthly average relative humidity of ≤90% and daily average humidity of ≤95%.
What is the seismic resistance level of this Box-Type Transformer?
The overall structure is designed to meet 8-degree seismic resistance requirements. Flexible connections and vibration reduction measures are incorporated to prevent structural damage during earthquakes and maximize power supply continuity, making it ideal for power grid construction in earthquake-prone regions.
What are the rated capacity and voltage options available?
The transformer supports a rated capacity range of 100~1250 KVA with a nominal voltage of 10/0.4 KV. The high-voltage electrical cabinet operates at 10KV with a rated current of 630A, while the low-voltage electrical cabinet operates at 0.4KV with a rated current range of 100~2500A. For special usage conditions beyond standard specifications, please consult the manufacturer directly.