AXPERT-Medium Voltage Drive

The AXPERT-HIVERT series Medium Voltage Drive  employs proven topology where multiple power cells are connected in series. Well-developed wave stacking method, highly reliable devices and the self-innovated SVPWM control strategy ensures high control accuracy, fast response and high performance.

Power Rating: 250 kW to 12500 kW  

Voltage Rating:  3.3 kV, 4.16 kV, 6.6 kV & 11 kV

Features
 
  • Protection of overload and over-current condition
  • Protection of open-phase and ground fault condition
  • Protection of over-voltage and under-voltage
  • Overheat protection
  • Current limit function
  • Interlock protection of control power supply
  • Two sets of control power hot standby redundancy
  • Power cell bypass function (optional)
  • Cabinet door opening alarm function
  • Synchronizing switch function between mains frequency and output variable frequency
  • Motor soft starting, no impact to mechanical equipment and power network
  • High efficiency: at rated condition, the efficiency of VFD is 98%, the overall efficiency including the transformer is 96%
  • Communication of power units using optical fiber ensures sufficient electric isolation
  • Embedded PID regulator with close-loop control
  • Multiple communication methods with host computer, isolated RS 485 interface, standard MODBUS RTU communication protocol, optional PROFIBUS DP, industrial Ethernet communication protocol
  • Three kinds of control modes including local control, remote control and host control
    • Multiple speed adjustment modes including local, host, simulation and switching signal
    • Accurately records faults history more than 10 times
    • Compact construction, small dimensions
    • Special design according to customer's requirement

Advantages
 
  • No need of extra output filtering device.
  • Directly driving the general high voltage synchronous or asynchronous motor, and the temperature of the motor will not be increased.
  • No need of motor derating operation.
  • No dv/dt damage to insulation of motor and cable.
  • No torque ripple induced by harmonics, and the service life of motors and mechanical devices can be extended.
  • No cable length limit as the voltage drop is in the allowable range.
 
     
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