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China YB-12 Prefabricated Substation Suppliers - 35kV Mining Explosion-Proof High Protection Factory Model
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: ≤ 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
Seismic & Safety
• 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
QWhat temperature range can this box-type transformer operate in?
The box-type transformer is designed for stable operation 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 reliable performance in both extreme cold and hot conditions.
QWhat is the wind resistance capability of this transformer enclosure?
The enclosure is constructed from high-strength frames and weather-resistant steel plates, engineered to withstand 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 from ice accumulation of up to 20mm.
QIs this transformer suitable for high-humidity or high-altitude installations?
Yes. The unit is verified for use at altitudes up to 1000 meters, with insulation design that accounts for reduced air density. An automatic temperature and humidity control system is built in, and a heating dehumidification device activates automatically when humidity exceeds set thresholds, preventing condensation even at monthly relative humidity levels of up to 90% and daily levels of up to 95%.
QWhat seismic resistance standard does this transformer meet?
The transformer is designed in accordance with 8-degree seismic resistance requirements. Flexible connections and vibration-dampening measures are incorporated to protect the main equipment from structural damage during seismic events, making it well-suited for power grid construction in earthquake-prone regions.
QWhat is the rated capacity range of the transformer and the protection grade of the enclosure?
The transformer supports a rated capacity range of 100~1250 KVA. The enclosure for the high-voltage cabinet, transformer, and low-voltage cabinet all carry a shell protection grade of IP23. Additionally, all door gaps and interface areas are treated with multi-layer sealing, achieving a protection level above IP54 for the internal equipment.
QCan this transformer be customized for special operating conditions?
Yes. If your installation site involves special usage conditions — such as unusual environmental factors, extreme altitudes, or other non-standard requirements — these can be accommodated. Please discuss your specific requirements with the manufacturer prior to placing an order so that a suitable solution can be arranged.