Special Transformer Solutions for Harsh Environments - Customized High Adaptability
Ⅰ. Environment-Tolerant Custom Design
- Extreme Temperature Adaptability
- F-class insulation materials designed with H-class thermal rise margin.
- Enhanced cooling: Stepped radiators + optimized copper-tube oil ducts; optional IP55-rated intelligent forced-air cooling system (40% thermal control efficiency boost).
- Cold-start technology: Silicone-modified insulating oil (solidification point ≤ -60℃) with anti-condensation electric trace heating.
- Pre-heating modules for critical components (optional), ensuring safe startup at -50℃.
- High-Temperature Operation (≥150℃)
- Low-Temperature Operation (-40℃ to -60℃)
- High-Altitude Reinforcement (≥3,000m)
- Insulation distance increased by 20% (per IEC 60076-15), CTI≥600 epoxy for solid insulation.
- Upgraded external insulation: Extended-shed bushings; SF6 gas insulation for dry-type transformers (withstand strength ≥40 kV/cm).
- Salt Spray/Heavy Pollution Protection
- Triple Anti-Corrosion System:
|
Layer |
Solution |
Standard |
|
Enclosure |
IP55 stainless steel + triple-layer heavy-duty epoxy coating (5,000h salt spray test) |
ISO 12944 C5-M |
|
Internal |
Nitrogen-pressurized sealing (N₂ purity ≥99.999%) |
IEC 60076-11 |
|
Terminations |
Silicone-sealed terminal box + silver-plated copper terminals |
IEC 60529 |
Ⅱ. Explosion Safety System
- Certified for Explosive Atmospheres (Chemical/Mining):
- Ex d IIC T4 flameproof enclosure (ATEX 2014/34/EU compliant), flamegap ≤0.1mm.
- Safety interlock: Pressure-release valve + instant trip breaker (response ≤2ms), grounding resistance ≤0.5Ω.
- Intrinsic Safety Monitoring:
- Ex ia online monitoring (partial discharge + DGA), signals isolated via Zener barriers.
Ⅲ. Seismic Reinforcement
- Dynamic Structural Simulation
- FEA seismic response spectrum per IEEE 693 (High Level), peak acceleration 0.5g.
- Displacement-Tolerant Design
- Internals: Honeycomb support frame + axial winding compression (displacement tolerance ≥±15mm).
- External: High-strength viscous dampers (damping coefficient ≥30%), withstands seismic intensity IX.
Ⅳ. Target Performance & Validation
|
Parameter |
Target |
Verification Method |
|
Environmental Range |
-60℃~+65℃, 100%RH |
IEC 60068-2 test series |
|
MTBF |
≥300,000 hours |
IEC 60721-3-4 |
|
Seismic Resistance |
IEEE 693 Severe Level |
3-axis shaker table test |
|
Explosion Certification |
ATEX/IECEx dual cert |
EN 60079-0/1 |
Final Efficacy:
- Failure rate <0.1 incidents/year in extreme environments.
- Service life extended to 35 years.
- O&M costs reduced by 45%.
07/28/2025
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