How To Do When High-voltage Inverter is Shut Down?

ZONCN New High-Voltage-Inverter-2

During the use of high-voltage inverters, it is inevitable that they will suddenly shut down for some reasons. After the high-voltage inverter is shut down, a series of inspections and maintenance are required to ensure the safety and reliability of the equipment. Shutdown is not terrible, but how to maintain the inverter after it is shut down?

First, we need to record the fault code and alarm information at the time of shutdown and analyze the cause of shutdown. At the same time, check whether the shutdown is caused by load, environment or improper operation.

We all know that electrical products are a little dangerous, so before any inspection, make sure that the high-voltage inverter is completely powered off. At the same time, perform necessary electrical isolation on the equipment to prevent accidental startup caused by misoperation. If necessary, wait for a while to ensure that the charge of the internal capacitor is completely released to avoid the risk of electric shock.

Later, we can check the inverter according to the following steps:

  • 1. Check the surrounding conditions-carefully check the ventilation and lighting conditions of the inverter and the surrounding environment. Check whether there are any abnormalities outside the inverter, such as overheating, odor, smoke, etc. Make sure that the ventilation equipment can operate normally and the lighting equipment can be used normally.

  • 2. Check the internal cables – open the inverter cabinet door, check whether the internal cables are damaged, whether the connection between cables is correct and reliable, whether all grounding wires are firm and reliable, and whether the grounding points are rusty. All bolts and nuts in the inverter should be tightened every six months to ensure reliable connections.

  • 3. Check the tightness of all electrical connections – check whether all circuits in the inverter have abnormal discharge marks, strange smells, discoloration, cracks, breakage, etc. Check whether the optical fibers of all power units are damaged or loose, and whether each is plugged in tightly.

  • 4. Measure the insulation of the inverter – After each long-term shutdown, use a 2500V megohmmeter to perform insulation tests on the main circuits of the inverter and bypass cabinet to ensure that the inverter can be started only after the test is qualified.
  • 5. Careful inspection – After each maintenance of the inverter, carefully check whether there are any missing screws, spring sheets, bolts, metal wires and other items inside and outside the inverter cabinet to prevent small metal items from being sucked into the interior after the inverter fan is started, causing a short circuit accident of the inverter.

  • 6. Thorough cleaning – Use a vacuum cleaner with a plastic nozzle or an air compressor to thoroughly clean the inside and outside of the inverter and the distribution room to ensure that there is no excessive dust around the equipment and to ensure a clean operating environment.

  • 7. Check before starting – Especially after major changes to the electrical circuit, check whether all electrical connections are correct and firm to prevent the occurrence of “reverse power supply” accidents.

After ensuring safety, power on again and perform functional tests. Check whether the various parameters of the inverter are normal, such as voltage, current, frequency, etc. At the same time, load test is performed to ensure that the high-voltage inverter can drive the load normally.

Through the above steps, it can be ensured that the high-voltage inverter can safely and effectively troubleshoot and resume normal operation during the post-shutdown processing. We also recommend that you seek help from professionals. ZONCN has been committed to the research and development and production of inverter products. We have the most professional team. If you need any help, please feel free to contact us.

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