Mining explosion-proof transformers are specialized equipment used in coal, petroleum, chemical and other explosive hazardous environments. Their core function is to provide safe and reliable power supply in flammable and explosive locations. As the core winding material for mining explosion-proof transformers, copper foil must meet strict explosion-proof standards while possessing excellent electrical performance and mechanical strength.
I. Technical Characteristics and Copper Foil Requirements
1.1 Working Environments
Mining explosion-proof transformers are mainly used in the following hazardous environments:
- Underground coal mines: methane (gas) and coal dust explosion risks
- Petroleum and chemical industries: flammable gases, vapors, and dust explosion risks
- Underground tunnels: humid environments with poor ventilation
- Dust environments: combustible dust such as metal and grain dust
1.2 Basic Requirements
| Requirement | Specification |
|---|---|
| Explosion-Proof Mark | ExdI, ExdIIA/B, ExeII |
| Insulation Class | Class F (155°C) or Class H (180°C) |
| Protection Rating | IP65 and above |
1.3 Core Selection Considerations
- Conductivity: IACS≥101%
- Insulation matching
- Mechanical strength: 200-280 MPa
- Thermal stability
- Flame retardant performance
II. Technical Specifications
2.1 Recommended Grades
| Grade | Conductivity | Tensile Strength | Application |
|---|---|---|---|
| C11000 (ETP) | ≥101% IACS | 200-280 MPa | Standard Mining |
| C10100 (OFC) | ≥101.5% IACS | 190-260 MPa | High-Performance |
| C10200 (TPA) | ≥101% IACS | 195-265 MPa | Precision Applications |
2.2 Key Parameters
Electrical: Conductivity IACS≥101%, Resistivity 0.01724 Ω·mm²/m
Dimensions: Thickness 0.3-3.0mm, Tolerance ±0.02mm, Width 20-600mm
Mechanical: Tensile strength 200-280 MPa, Elongation ≥15-25%, Hardness 35-65 HV
III. Industry Standards and Certifications
Standards: GB 3836, IEC 60079, GB/T 8286, IEC 60325, GB/T 5231
Certifications: Explosion-proof certificate, ISO 9001, Coal safety certification, SGS testing
IV. Quality Inspection
| Inspection | Standard |
|---|---|
| Chemical Composition | Cu≥99.90% |
| Thickness Tolerance | ±0.02mm |
| Conductivity | IACS≥101% |
| Surface Quality | No defects |
V. Supplier Selection
- Full-process production line
- Thickness control accuracy: ±0.02mm
- ISO 9001 certified
VI. Product Specifications
| Grade | Thickness | Width | Conductivity |
|---|---|---|---|
| C11000 | 0.3-3.0mm | 20-600mm | ≥101% IACS |
| C10100 | 0.3-2.5mm | 20-500mm | ≥101.5% IACS |
| C10200 | 0.3-3.0mm | 20-600mm | ≥101% IACS |
Conclusion
Our company has 30 years of experience exporting electrical wire and metal foil. We provide C11000/C10100/C10200 series copper foil for mining explosion-proof transformers with customized sizes and global sample shipping.
Contact:
Email: office@cnlpzz.com
WhatsApp: 0086-19337889070
The technical parameters described are general reference values. Please consult our technical team for specific selections.