The working principle of emergency power supply:
When the mains power input is normal, the input mains power supplies power to important loads through the mutual switching device. At the same time, the system controller automatically detects and passes the mains power. The charger manages the charging of the battery pack.
2. When the input mains power supply is interrupted or the mains voltage exceeds the limit (±15% or ±20% of the rated input voltage), the system controller command mutual switching device will be in (0.1~4) S After switching to the inverter for power supply in a short period of time, the EPS system supplies power to user loads with the support of DC energy provided by the battery pack.
3. When the input mains voltage returns to normal operation, the EPS system controller issues an instruction to shut down the inverter, and also performs power supply from the inverter to AC bypass through the mutual switch. Power supply switching operation. After that, the EPS provides mains power to the load through the AC bypass power supply path, and at the same time continues to charge its battery pack through the rectifier charger.
Application of emergency power supply: Emergency power supply must first be easy to maintain, or even require no maintenance. The battery has a long life and can adapt to harsh working conditions. For example, some products can work normally within a wide range of temperature differences. In addition, it also depends on whether the function meets the needs and whether it is convenient to use.
Extended information:
EPS emergency power supply is a device designed to supply power to primary loads such as fire emergency lighting, accident lighting, and fire protection facilities. Its main function is to start up after a power outage. Backup power supply. According to the power, it can be divided into: 0.5KW, 1KW, 1.5KW, 2KW, 2.2KW, 3KW, 3.7KW, 4KW, 5KW, 5.5KW, 6KW, 7KW, 7.5KW, 8KW9KW, 10KW, 11KW, and other emergency specifications. Fire power supply.
Baidu Encyclopedia - Emergency Power Supply