📘 Product Overview
The YBF3 series flameproof three-phase asynchronous motor is a dedicated explosion-proof motor designed for fan applications. It is specifically developed for main axial-flow ventilation fans in mining and industrial environments.
According to the special operating characteristics of fan systems, this series has been optimized in bearing structure design and cable outlet configuration to ensure higher reliability and longer service life.
The motor features an attractive appearance, safe and reliable operation, long service life, and excellent performance. It is easy to install, operate, and maintain.
⚙️ Design Standards & Compliance
The power ratings and mounting dimensions of this series comply with International Electrotechnical Commission (IEC) standards, and are fully interchangeable with DIN 42673 (Germany) standards, which facilitates export equipment matching and spare parts replacement.
The explosion-proof performance complies with:
- GB3836.1-2000: Electrical apparatus for explosive gas atmospheres – Part 1: General requirements
- GB3836.2-2000: Electrical apparatus for explosive gas atmospheres – Part 2: Flameproof enclosure “d”
It also conforms to international standards:
- IEC 79-1
- BS 4683
- EN 50018
💥 Explosion Protection Classification
Explosion-proof marking:
- Ex d I
- Ex d II A T4
- Ex d II B T4
Application Scope:
- Ex d I: Suitable for underground coal mines where methane or coal dust explosive mixtures exist in non-mining working areas.
- Ex d II A T4: Suitable for industrial environments of Group II A gases with temperature classes T1–T4.
- Ex d II B T4: Suitable for industrial environments of Group II B gases with temperature classes T1–T4.
🔧 Electrical & Structural Features
- Insulation Class: F
- Advanced temperature rise design ensuring long service life
- Cylindrical shaft extension for coupling or gear transmission
- Stator windings made of high-strength polyester enamelled copper wire
- Vacuum Pressure Impregnation (VPI) process applied to windings
Advantages of VPI Treatment:
- Excellent electrical insulation performance
- High mechanical strength
- Strong moisture resistance
- Improved thermal stability
🌐 Application
The YBF3 series is widely used in:
- Main ventilation fans in mining systems
- Axial-flow industrial fans
- Explosion-hazardous ventilation systems
- Petrochemical and industrial airflow systems
🧩 Engineering Highlights
- Special design optimized for fan load characteristics
- Reinforced bearing structure for long-term operation
- Optimized cable outlet design for safer installation
- High reliability in explosive environments
- IEC-standard compatible for global export applications
