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35kV Mining Special Explosion-Proof Prefabricated Substation - China Suppliers & Factory Edition
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. 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
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
- • No risk of fire, explosion, severe pollution, chemical corrosion or severe vibration
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
Q
What temperature range can this box-type transformer operate in reliably?
This box-type transformer is designed for stable operation across a wide temperature range of -10°C to +40°C. It incorporates special insulation materials and a ventilation cooling system capable of handling solar radiation heat loads up to 1000W/m², ensuring consistent performance in both extreme cold and hot environments.
Q
What level of wind and weather resistance does the enclosure provide?
The box structure is constructed with high-strength frames and weather-resistant steel plates, capable of withstanding wind speeds up to 35m/s — equivalent to a Level 12 typhoon. The enclosure also resists ice accumulation loads of up to 20mm and features multi-layer sealing on all door gaps, achieving an IP54 or above protection rating.
Q
Is this transformer suitable for high-altitude or high-humidity installations?
Yes. The electrical insulation is designed with sufficient safety margins for altitudes up to 1000 meters. An automatic temperature and humidity control system is built in, which activates a heating dehumidification device when humidity exceeds set thresholds — maintaining safe operation even when monthly average relative humidity reaches 90% or daily average reaches 95%.
Q
What is the seismic resistance rating of this product?
The overall structure is engineered to meet 8-degree seismic resistance requirements. Flexible connections and vibration-dampening measures are integrated throughout to protect the main equipment from structural damage during earthquakes, making it especially well-suited for power grid infrastructure in earthquake-prone regions.
Q
What are the rated capacity and voltage options for this transformer?
The transformer supports a rated capacity range of 100~1250 KVA with a voltage ratio of 10/0.4 KV. The high-voltage cabinet operates at a nominal voltage of 10 KV, while the low-voltage cabinet operates at 0.4 KV with rated currents from 100A to 2500A, accommodating a wide range of power distribution applications.
Q
Can this product be customized for special installation conditions?
Yes. For installations that fall outside the standard operating environment specifications — such as extreme altitudes, unusual humidity levels, or special seismic zones — customers are advised to contact the manufacturer directly when placing an order to discuss tailored solutions and ensure optimal performance and safety compliance.