Compared with the traditional power switch, the air switch is a controller of the low-voltage distribution network and the electric drive system. The control and protection functions are more prominent during use. In the case of not fully contacting and breaking the circuit, the same is true for the electric appliance. The passage of the device or the load is protective, and it is also suitable to use the ground start motor.
The working principle of the air switch, the working current of the gear exceeds the rated current, short circuit, voltage loss, etc., and the circuit is automatically cut off.
From 1P to 4P, 1P is 1 line in and out, 2P is 2 lines in and out, and so on. 1P-2P is generally used in households. The difference between 1P and 2P is that 1P can only disconnect one line of fire, 2P can colleague Disconnect the live and neutral lines, so 2P is a better point.
Assuming that the rated voltage of the device you are loading is 220V, it is basically enough to use the 1-2P air switch. If your rated voltage is 380V, then 3-4P is required at this time. For the load equipment, you need the zero line to select 3P. If the 380V water heater and other equipment, then need 4P, and also have an air switch with leakage protector function, because in order to prevent leakage, it threatens the safety of electricity.
Although the air switch is a small thing in home decoration, it is very important for the safety of household electricity. I hope that I can help you!
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