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  • It is easy to overvoltage, or overvoltage, over current at the same time.
  • 2018/1/6 number of times read:[844]
  • Fault phenomenon: easy to start, but it is easy to overvoltage when the voltage is raised, and sometimes overvoltage and overcurrent occur simultaneously.


    Fault analysis and processing are as follows.


    It is easy to overvoltage when the A. is started, indicating that the front angle of the inverter is too large, which causes the overvoltage of the reverse burr, and it is easy to make the overvoltage protection action. In the sweep circuit, the over-voltage bridge has the function of direct discharge after overvoltage. At this time, if the current is large, the overcurrent protection will also act.


    The main circuit inside the B. power supply cabinet has the phenomenon of virtual connection, insulation reduction and fire.


    The C. load coil or capacitor has the phenomenon of virtual connection, insulation reduction, and fire.


    D. inverter thyristor triggers unreliable factors, connection loosening or gate pole

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