Special Transformer Solutions for Harsh Environments - Customized High Adaptability
Rockwill
17yrs 700++
staff 108000m²+m² US$150,000,000+ China
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
Recommended
Solution for Medium-Voltage Motor Control and Protection Using Vacuum Contactor-Fuse (VCF) in a Coal Conveying System
Project BackgroundA coal conveying system comprises 15 belt conveyors driven by medium-voltage motors. The system operates under complex conditions, with motors often subjected to heavy loads and frequent starts. To address these challenges and achieve effective control and reliable protection during motor startup, the project comprehensively adopts Vacuum Contactor-Fuse (VCF) combination devices for the 6kV medium-voltage motor power distribution. This solution details the technical features,
ABB Vacuum Contactor KC2 Power Supply System Technical Transformation Plan
Issue OverviewThe 10kV air compressor starting system of a company utilizes the ABB vacuum contactor KC2 as the control component for the operating circuit. The dedicated wide-voltage power supply module paired with this contactor presents the following issues:Frequent failures: The power supply module fails to properly transition the voltage from 300V to 12V, resulting in fuse blowouts.Poor heat dissipation: Enclosed installation of the module leads to insufficient heat dissipation, acceler
Dedicated Vacuum Contactor Solution for Port Shore Power Systems
I. Background and ChallengesShore power systems have become core technical equipment for ports to reduce carbon emissions and noise pollution. However, these systems face two major challenges in the harsh operational environment of ports:Severe Environmental Corrosion: High humidity and salt spray in port areas cause serious corrosion to metal components and enclosures of electrical equipment, significantly impacting electrical lifespan and operational reliability.High Switching Requirements:
Vacuum Contactor Industrial Power Control Solutions
Application Background and Pain Point AnalysisIn modern industrial manufacturing power control systems, traditional contactors exhibit significant limitations under specific operating conditions:• Frequent Start-Stop Operations: Traditional contactors have limited mechanical lifespan, with frequent operations leading to coil burnout and mechanical jamming.• Poor Adaptability to Harsh Environments: Contacts are prone to oxidation in dusty environments, resulting in increased contact
About
Rockwill
Wenzhou Rockwill Electric Co., Ltd.
17yrs 700++
staff 108000m²+m² US$150,000,000+ China
