Flameproof with Intrinsically Safe, China Ex and MA certied, 660V and 1140V, power rating cover 45kW to 1300kW, Load-Sharing function for conveyor system, advanced tube cooling technology, combination of two or three VFD units provided backup exibility.

Introduction

The VFD product was first time launched in end of 1999 by KAICHENG in China market, for the application to drive asynchronous motor and control its speed, in hazardous site such as coal dust and gas environment, in coal mining underground. The VFD is suitable for drive of Belt Conveyer, Armored Face Conveyer, Elevator, Pump, and Fan, to achieve the operation target of reliable and save energy.

Application

The product is used in the site of Coal Mines, Iron Ore, Non-Ferrous, Petro-Chemical, Military Industry, and Pharmacy, where have the hazardous explosive environment.

Features

• Advanced Speed Sensor-less Vector Control：Enhanced torque output can output 150% of rating torque when frequency at 0.5Hz, the maximum torque output up to 200%
• Wide range of Voltage Tolerance：-15%～+10%, can match the worse power supply situation underground
• Standard Modbus interface
• Low Inductance BusBar Technology：improved the VFD reliability with reduced distributed Inductance
• Cooling：heating-tube for low /medium power rating, while water-cooling for large power rating VFD
• Inside PID control：the PID control can work with a variety of sensors, to perform the close-loop control.
• Wide range of frequency adjustment (0～200Hz)
• Complete EMC solution
• Energy saving
• Load sharing / Power Balancing function
• Optional 12 Pulse Inverter for medium and large rating of VFD
• Power rating: 30～1300kW / 660V, 1140V

>Dual / Triple VFD Combination

• Suitable for Conveyer control
• Common wiring section, easy to engineering
• Compact size, reduce the space requirement in site
• Modular design, easy to transport and assemble underground
• Internal fieldbus for load sharing / power balancing
• Optional Common DC Bus architecture
• Optional 12 pulse or18 pulse inverter
• Optional integrated Conveyer Control & Protection system
• Power rating: 3(2) × (200 – 630) kW / 1140V

VFD-ATS Combination

• Dual Mains incoming with dual VFD, automatic transfer between main and backup
• Suitable for Fan control system
• Internal main incoming switch disconnect