4. Main parameters

Rated voltage: Clear the applicable voltage range of the switch, such as the common 220V, 380V, 400V and other different specifications, according to the actual power supply system voltage to choose the appropriate rated voltage of the dual power switch to ensure normal work and safe and reliable.
Rated current: refers to the current size that the switch can safely carry for a long time, from tens of amps to thousands of amps, and should be rationally selected according to the total working current of the load equipment to prevent overload and other conditions from damaging the switch and affecting the power supply.
Conversion time: Different types and different application scenarios have different requirements for conversion time, such as the PC level and CB level conversion time mentioned earlier, there is a big difference, and the appropriate product needs to be determined according to the load’s tolerance to the power failure time.

5. Application Scenarios
Hospitals: such as operating rooms, intensive care units, emergency equipment, etc., have extremely high requirements for the continuity of power supply, and once the power failure may endanger the life safety of patients, it must be equipped with dual power switch to ensure uninterrupted power supply.
Data center: Devices such as servers need steady power supply. A power outage may cause data loss or service interruption. Dual power switch ensures reliable switching between the mains and standby power supplies (such as UPS and diesel generators).
High-rise buildings: elevators, fire fighting equipment and other important power facilities rely on dual power switch, when the mains power problem can be quickly switched to standby power, to avoid personnel trapped in the elevator and to ensure that fire fighting, evacuation and other work can be carried out normally.
Six, selection points
It is necessary to fully consider the nature of the load, whether it is inductive load (such as motor, etc.) or capacitive load, and the starting impulse current of different loads when switching the power supply is different, which will affect the selection of the switch.
Specific requirements for the reliability of the power supply, such as the maximum allowable power failure time, so as to ensure

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