Mine Explosion Proof&Intrinsically safe Variable Speed Drive

Flameproof VFD for coal mine 

Introduction

ZBT series of mining explosionproof VFD is suitable for the place with explosive gas and dust. the product has 380V/660V, 1140V and other voltage grades, which meet the high performance of  two quadrant and four quadrant speed regulation requirements for three-phase ac motor with 60-630 kW power range .

This product has accumulated more than 10 years of research results of frequency conversion technology and over 30 years of industry experience, it is high tech product specially developed for the mining industry which has the requirements of heavy load, large power, poor use conditions etc.

Application: metal and non-metallic mines

● vertical/ inclined hoist                ● belt conveyor
       ● scraper conveyor                       ● poleless rope electronic control
       ● Aerial cable wayelectric control    ● Emulsion Pump Station
       ● fans/ ventilators                         ● pumps

Type of suitable motor

● three-phase asynchronous motor ● three-phase synchronous motor
       ● Permanent magnet motor

Working conditions:
       1. altitude less than 1000m ( above sea level need to reduce capacity use);
       2. ambient temperature (-10~40)℃;
       3. ambient relative humidity is not greater than 95% (25℃);
       4. mines with explosive gases (methane) and coal dust;
       5. no strong vibration or shock;
       6. No corrosive gases which could damage metals and insulating materials;
       7. No water droplets and infiltrating;
       8. pollution grade: grade 3.

 Table 1 Basic Parameters of Mining Explosion Proof VFD

        Product characteristics

        1. Large torque:
        Low speed with large torque, smooth start, small mechanical impact.
        2. Low waste:
        Low frequency feedback control mode at rectifier side, small machine temperature rising, with less waste.

        3. Low harmonics:

        Special filter design, low harmonic content with less interference.

        4. High reliability:

        Large margin, long service life design, stable and reliable operation.

        5. High Security:

        Perfect protection function, zero speed with full torque output, redundant safety protection.

        6. Easy to maintain:

        Fast open door, modular structure, small size, compact structure for easy installation, use and maintenance.

Huafei Company could provide complete Mining Explosion Proof Variable Frequency Drives, include Electric Driving, Single Quadrant Vfd Drive, Coal Mine Vfd, Coal Mine Explosion Proof Vfd, Explosion Proof Vfd, Vfd Drive Hoist, Vfd Drive Hoist.