What are the common faults of off grid high frequency inverters and how to solve them?

Different from ordinary inverters, the main function of off grid high frequency inverters is to add a high-frequency conversion in the process of power inversion. So, what are the common faults of off grid high frequency inverters? How should it be solved? Here are some introductions.

Here is the content:

Low insulation resistance

Low bus voltage

Leakage current fault

DC overvoltage protection

The inverter does not respond when starting up

Low insulation resistance

Use the elimination method. Unplug all the strings on the input side of the off grid high frequency inverter, and then connect them one by one. Use the function of the off grid high frequency inverter to check the insulation resistance after turning on the off grid high frequency inverter to detect the problem string. After finding the problem string, check the DC Whether the connector has a water-immersed short-circuit bracket or a fusion short-circuit bracket, in addition, you can also check whether the component itself has black spots on the edge and burned, causing the component to leak electricity to the ground grid through the frame.

Low bus voltage

If it occurs in the morning/night period, it is a normal problem, because the off grid high frequency inverter is trying to limit power generation conditions. If it occurs during normal daytime, the detection method is still the exclusion method, and the detection method is the same as the previous item.

Leakage current fault

The root cause of this type of problem is the installation quality of off grid high frequency inverters, the wrong installation location, and low-quality equipment. There are many fault points: low-quality DC connectors, low-quality components, unqualified component installation height, low-quality grid-connected equipment, or water leakage. Once similar problems occur, you can find the leakage points by spraying powder and do a good job. Insulation work solves the problem, if it is the problem of the material in the province, the material can only be replaced.

DC overvoltage protection

As components pursue high-efficiency process improvements, power levels continue to update and rise, while component open-circuit voltage and operating voltage are also rising, temperature coefficient issues must be considered in the design stage to avoid overvoltage in low-temperature conditions causing off grid high frequency inverter equipment to become hard. damage.

The inverter does not respond when starting up

Please make sure that the DC input line is not reversed. Generally, the DC connector has a fool-proof effect, but the crimping terminal has no fool-proof effect. It is important to read the manual of the off grid high frequency inverter carefully to ensure that the positive and negative poles are crimped before crimping. The off grid high frequency inverter has built-in reverse connection short-circuit protection and starts normally after normal wiring is restored.

Shenzhen sunray power Co., Ltd. was established in 2004, it is a professional company engaged in off grid high frequency inverters research. All products in the factory will go through several performance tests. If you are interested in our high-quality products, you can contact us. Our website is https://www.sunrayups.com/.