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China Suppliers Factory YB-12 Prefabricated Substation 35kV Mining Special Explosion-Proof High Protection 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: ≤ 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
Exclusions
- No risk of fire or explosion
- No severe pollution present
- No chemical corrosion risk
- No severe vibration conditions
⚠️ 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)
Q
What operating temperature range does this box-type transformer support?
This box-type transformer is designed to operate reliably across a wide ambient temperature range of -10°C to +40°C. It uses special insulation materials and a ventilation cooling system to handle solar radiation heat loads up to 1000W/m², ensuring stable performance in both extremely cold and hot conditions.
Q
What is the wind resistance capability of this transformer enclosure?
The box structure is constructed from 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 top cover is specially designed to drain rainwater effectively and resist additional loads caused by up to 20mm of ice accumulation.
Q
Can this transformer be used in high-altitude or high-humidity environments?
Yes. The electrical insulation design accounts for the reduced air pressure at altitudes up to 1000 meters. An automatic temperature and humidity control system is built in — when humidity exceeds the threshold, the heating dehumidification device activates automatically, preventing condensation even when monthly average relative humidity reaches 90% or daily average humidity reaches 95%.
Q
What seismic resistance standard does this product meet?
The overall structure is designed to meet 8-degree seismic resistance requirements. Flexible connections and vibration-dampening measures are incorporated to prevent structural damage to main equipment during earthquakes and to maintain power supply continuity. This makes it particularly suitable for grid construction in earthquake-prone regions.
Q
What are the rated capacity and voltage specifications for the transformer component?
The transformer supports a rated capacity range of 100~1250 KVA with a nominal voltage of 10/0.4 KV. The rated frequency is 50Hz. For the noise level, oil transformers operate below 55 dB and dry transformers at ≤65 dB, with a shell protection grade of IP23.
Q
What should I do if my installation environment has special conditions not listed in the standard specs?
If your installation environment involves special conditions — such as environments with chemical corrosion risks, fire or explosion hazards, severe pollution, or vibration levels beyond the standard specifications — please contact the manufacturer directly before placing an order. Custom solutions can be discussed and arranged to meet your specific requirements.