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China Suppliers YB-12 35kV Mining Prefabricated Substation Factory for Explosion-Proof High Protection Solutions
Product Features
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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.
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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.
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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.
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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: ≤ 1000 W/m²
- Sea depth: ≤ 1000 m
- Ice coverage: ≤ 20 mm
- 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: ≤ 2.2 kPa
- Monthly average relative water vapor pressure: ≤ 1.8 kPa
Safety Requirements
- 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 (Low-Voltage Side) | kvar | — | — | 300 |
Detail Pictures
Frequently Asked Questions (FAQ)
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What is the operating temperature range of this box-type transformer?
This box-type transformer is designed to operate stably across a wide ambient temperature range of -10°C to +40°C. The thermal design has been rigorously verified, and key components are selected for wide-temperature-range performance to ensure reliable operation in both extremely cold and extremely hot environments.
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What wind and weather resistance standards does this transformer meet?
The box structure is constructed with high-strength frames and weather-resistant steel plates capable of withstanding wind pressure loads of up to 35 m/s, equivalent to a Level 12 typhoon. The top cover features a special drainage design and can resist additional loads from up to 20mm of ice accumulation. All sealing areas achieve a protection level of IP54 or above.
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Is this transformer suitable for high-altitude or high-humidity installations?
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, which activates a heating dehumidification device when internal humidity exceeds the set threshold, preventing condensation even in environments with daily average relative humidity up to 95% and monthly averages up to 90%.
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What is the seismic resistance rating of this box-type transformer?
The overall structure is engineered to meet 8-degree seismic resistance requirements. Flexible connections and vibration damping measures are incorporated to protect the main equipment from structural damage during earthquakes and to maximize power supply continuity, making it ideal for seismically active regions.
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What are the rated capacity and voltage options available?
The transformer supports a rated capacity range of 100 to 1250 KVA with a voltage ratio of 10/0.4 KV. The high-voltage electrical cabinet operates at 10 KV with a rated current of 630 A, while the low-voltage electrical cabinet operates at 0.4 KV supporting rated currents from 100 A to 2500 A, offering flexible configuration for various project requirements.
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Can this transformer be customized for special usage conditions?
Yes. For installations that fall outside the standard operating environment specifications — such as extreme altitudes, unusual humidity levels, or special site conditions — customized solutions are available. Please contact the manufacturer directly when placing your order to discuss specific requirements and appropriate engineering resolutions.