The second-generation EA800 series 1kVA~30kVA intelligent industrial frequency inverters are a new power product that integrates the advantages of the previous generation and employs digital control technology; the system utilizes online double conversion principles, DSP digital control technology, and a series of precise and mature designs, providing the load with continuous, stable, and pure sine wave power; meeting the high reliability requirements of uninterrupted power supply for various industries, and representing the new generation of industrial frequency uninterruptible power supplies, which are characterized by reliability, safety, and maintainability.