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  • Common problems when wiring terminals are overhauled by frequency converters

    Release time:2017-12-28 author:admin Browsing volume:912

    OFweek industrial control network: there are several kinds of faults in the use of inverter: 1, state failure; 2, hardware failure; 3, system failure; 4, communication failure; 5, power failure monitoring. As a common accessory product of frequency converter, the difference of connection performance can also affect the output efficiency of frequency converter. Now it will be listed by the situation that the frequency converter can't be used frequently because of the terminal's own problem. It will show you the most comprehensive solution to the inverter terminal problem.

    First of all, we should understand in detail the causes of common faults in the frequency converter.

    1, state fault: DC / DC overvoltage, DC overcurrent, AC overcurrent, excessive speed deviation, grounding fault and lack of equality.

    2, hardware failure: current board failure, trigger board fault, IGBT fault, pulse generator fault, etc.

    3, system failure: Watchdog fault, system parameter anomaly, clock fault and so on.

    4, communication failure: TIMEOUT, OVERRUN and so on.

    5, power failure: when the control power is too high / too low, alarm.

    Then let's make a specific analysis of the terminal problem.

    1. The switch power operation panel is not displayed.

    First, we should measure the control voltage of the control terminal and the adjustment voltage of the 10V frequency. If it is zero, the terminals will be used normally, otherwise the connecting products with higher quality will be replaced. Secondly, the resistance of the main terminals of the inverter is normal.

    2. The input line of the inverter can not measure the data.

    No fault is found when checking the fault record in the frequency converter menu, and the operation of the buttons on the operation panel is recorded in the event record. LED lamp check converter A10 motherboard, A22 power supply board were normal, with a test pencil test of inverter power supply, a phase display is not normal, the multimeter is used to measure the three results were: Vab=390V, Vac=190V, Vbc=190V. The contact of the terminal line of the inspection line is bad.

    3. The carbonization of terminals in the inverter module:

    When checking the inverter module with no adverse symptoms, should check the bad insulation problem between the terminal and the ground, once found between P-P1 and N DC bus loop terminal of the plastic insulated terminals are signs of carbonization, from a security point of view, the replacement of damaged inverter terminals, frequency converter can resume normal operation.

    OFweek industrial control network: there are several kinds of faults in the use of inverter: 1, state failure; 2, hardware failure; 3, system failure; 4, communication failure; 5, power failure monitoring. As a common accessory product of frequency converter, the difference of connection performance can also affect the output efficiency of frequency converter. Now it will be listed by the situation that the frequency converter can't be used frequently because of the terminal's own problem. It will show you the most comprehensive solution to the inverter terminal problem.

    First of all, we should understand in detail the causes of common faults in the frequency converter.

    1, state fault: DC / DC overvoltage, DC overcurrent, AC overcurrent, excessive speed deviation, grounding fault and lack of equality.

    2, hardware failure: current board failure, trigger board fault, IGBT fault, pulse generator fault, etc.

    3, system failure: Watchdog fault, system parameter anomaly, clock fault and so on.

    4, communication failure: TIMEOUT, OVERRUN and so on.

    5, power failure: when the control power is too high / too low, alarm.

    Then let's make a specific analysis of the terminal problem.

    1. The switch power operation panel is not displayed.

    First, we should measure the control voltage of the control terminal and the adjustment voltage of the 10V frequency. If it is zero, the terminals will be used normally, otherwise the connecting products with higher quality will be replaced. Secondly, the resistance of the main terminals of the inverter is normal.

    2. The input line of the inverter can not measure the data.

    No fault is found when checking the fault record in the frequency converter menu, and the operation of the buttons on the operation panel is recorded in the event record. LED lamp check converter A10 motherboard, A22 power supply board were normal, with a test pencil test of inverter power supply, a phase display is not normal, the multimeter is used to measure the three results were: Vab=390V, Vac=190V, Vbc=190V. The contact of the terminal line of the inspection line is bad.

    3. The carbonization of terminals in the inverter module:

    When checking the inverter module with no adverse symptoms, should check the bad insulation problem between the terminal and the ground, once found between P-P1 and N DC bus loop terminal of the plastic insulated terminals are signs of carbonization, from a security point of view, the replacement of damaged inverter terminals, frequency converter can resume normal operation.


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