Application matters and key points to note for dual power supply systems
Dual power supply system, which is powered by two independent power sources and controlled by a microprocessor, is used in the power grid system for switching between grid power and grid power, or for switching between grid power and generator power. It ensures continuous power supply. The following are the application matters and key points to note for the dual power supply system: 
Application Matters 
Dual power supplies are mainly applied to first-level loads that require higher power supply reliability, such as important party, government and military institutions, key national defense and scientific research projects, important news and broadcasting centers, transportation and communication hubs, public utilities, medical and health units, as well as military units and factories and enterprises. In these scenarios, power interruption would lead to serious consequences, so it is extremely necessary to adopt dual power supply. 
Key points to note 
1. Equipment inspection and maintenance: To ensure the normal operation of the dual-power distribution cabinet, regular equipment inspections are necessary, including power lines, switches, protection devices, etc. At the same time, the internal dust and debris of the equipment need to be cleaned regularly to keep it clean and dry. 
2. Load Capacity: When using a dual-power distribution cabinet, it is essential to pay attention to the load capacity. Overloading is strictly prohibited. Overloading will cause problems such as overheating of the circuit and damage to the equipment. In severe cases, it may even lead to safety accidents like fires. 
3. Grounding and Operation: It is necessary to ensure that the equipment is properly grounded to prevent electric shock accidents. When operating the equipment, safety operation procedures must be followed. It is prohibited to disassemble or repair the equipment at will. In case of equipment failure, the machine should be stopped for inspection immediately. It is forbidden to use it forcibly. 
4. Power phase sequence: For dual power supply systems, the three-phase phase sequence of the two power lines must be the same. Otherwise, the three-phase load of the motor will reverse, which could cause damage. 
In conclusion, the application of dual power supplies requires comprehensive consideration of various factors to ensure the reliability and safety of power supply.