15515673159
China Suppliers Factory Prefabricated Substation 35kV Mining Special Explosion-Proof High Protection Unit
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
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
Safety & Seismic
Earthquake intensity: ≤ 8 degrees
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 (FAQ)
Q
What temperature range can the box-type transformer operate in reliably?
A
The box-type transformer is designed for stable operation across a wide temperature range from -10°C to +40°C. Its thermal design uses special insulation materials and a ventilation cooling system to handle solar radiation heat loads up to 1000W/m², protecting internal components in both extreme cold and hot conditions.
Q
What is the wind resistance rating of this box-type transformer?
A
The enclosure is constructed with high-strength frames and weather-resistant steel plates capable of withstanding wind pressure loads of up to 35m/s, which is equivalent to a Level 12 typhoon. The top cover also features a special design to drain rainwater and resist up to 20mm of ice accumulation load.
Q
Is this transformer suitable for high-altitude and high-humidity environments?
A
Yes. The electrical insulation design accounts for reduced air density at altitudes up to 1000 meters. An automatic temperature and humidity control system is built in — when humidity exceeds the preset threshold, the heating dehumidification device activates automatically, preventing condensation even when monthly relative humidity reaches ≤90% and daily relative humidity reaches ≤95%.
Q
What seismic resistance level does this product meet?
A
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 an earthquake and to maximize power supply continuity. This makes it especially suitable for power grid construction in earthquake-prone regions.
Q
What are the rated capacity and voltage options available for this transformer?
A
The transformer supports a rated capacity range of 100~1250 KVA with a nominal voltage of 10/0.4 KV. The low-voltage electrical cabinet supports rated currents from 100A to 2500A, and the high-voltage electrical cabinet operates at 10KV with a rated current of 630A, providing flexible configuration for various application scenarios.
Q
Can this transformer be used under special environmental conditions beyond the standard specifications?
A
The standard product is designed for environments free from fire, explosion risk, severe pollution, chemical corrosion, or severe vibration. For special usage conditions that fall outside the standard operating environment — such as extreme altitudes, corrosive atmospheres, or unique seismic zones — customers are advised to contact the manufacturer directly when placing an order to discuss customized solutions.