Overview: EA890 series of three three-and labor-frequency double conversion online UPS is a combination of smart easy special UPS industry for many years experience in the use of upgraded second generation of power products, this series of products using the world's leading brand of device design, highly reliable whole digital processing technology, intelligent human-machine interface, and powerful intelligent network management, to provide reliable power protection for today's centralized server room, network management center, computer center, and a variety of advanced industrial automation equipment. Applications: widely used in finance, telecommunications, insurance, transport, taxation, military, security, energy, education, government, business and other industries to provide a strong power protection for the user load. Features: 1. Intelligent digital control: 1) the use of high-speed micro-controller for real-time control, parameter setting, run the program management, self-test and self-detection and other functions, all the independent circuit board connection is detected and fault protection. 2) Advanced DDC (Direct Digital Control / Direct Digital Control) use of technology, DSP (Digital Signal Processor / Digital Signal Processor) technology and dedicated IC, make products with outstanding performance. 3) Advanced IGBT modules (Insulated Gate Bipolar Transistor) has a good high-speed switching, high voltage, high current and other operating characteristics, high efficiency, the drive circuit miniaturization, effectively improve the overall efficiency and reliability of the product. 2. To allow 100% unbalance: 1) the use of a three-phase modulation independent, full-bridge inverter technology, the three-phase unbalanced load to 100% can be normal and reliable power supply. 3. Intelligent battery management functions: 1) The rectifier / charger integrated design, can be configured according to the battery capacity, the parameters set by the user interface by the software automatically adjusts the charge current, but can also be set automatically according to the battery power system security detection and charge / discharge interval to extend battery life. The rich communication features interface: 1) Built-in RS232 / RS485 communication port and a variety of dry contact signal interface, truly multi-purpose communications and remote monitoring. 5. Powerful Chinese / English display interface: 1) large-screen LCD as the main display screen, the display content may be Chinese / English select settings, operating status, operating procedures, data collection, fault detection information and other content at a glance. 6. Protection function: 1) with a variety of system protection, overvoltage, undervoltage, overcurrent, overload, short circuit and other abnormal state detection, alarm, and a reliable protection, environmental adaptability.