Generally, install aAir switchBecause the line is far away. If a leakage switch is installed, the failure rate will increase relatively, which may be caused by the wire. Install the leakage switch before using the equipment. The difference between the two is that the air switch will operate when its rated current is exceeded, while the leakage switch will trip when its rated current or leakage is exceeded. Mainly used for home or office lighting to ensure personal safety.

1. Air switch is our common name. Its correct name is air circuit breaker. Air circuit breakers are generally low-voltage, that is, the rated working voltage is 1KV. Air circuit breaker is a kind of switching device with multiple protection functions, which can cut off and connect the circuit under the condition of rated voltage and rated working current. The type of protection function and the protection method are selected by the user according to the needs. Such as short circuit protection, over current protection, shunt control, under voltage protection. The first two kinds of protection are the basic configuration of the air circuit breaker, and the latter two are optional functions. Therefore, the air circuit breaker can also break the circuit in a fault state (load short circuit, load overcurrent, low voltage, etc.).

2. The correct name of the leakage switch is the leakage protection circuit breaker, which is an air circuit breaker with special protection function (leakage protection). In addition to the basic functions of the air circuit breaker, it can also quickly disconnect the switch when the load circuit leaks (the leakage current reaches the set value) to avoid personal injury and adverse effects on electrical equipment when the load circuit leaks.

3. Leakage switch can not replaceAir switch. Although the leakage switch has one more protection function than the air switch, it may trip frequently due to leakage during operation, resulting in frequent power outages and affecting the continuous normal operation of electrical equipment. Therefore, it is generally only used for temporary electricity on the construction site or the socket circuit of industrial and civil buildings.

The leakage switch can also be said to be an air switch with similar mechanical action and arc extinguishing methods. However, since the protection of the leakage switch is mainly for individuals, the general operation value is ma. In addition, the action detection method is also different: the leakage switch uses a residual current protection device to detect the residual current, that is, to protect the algebra of the instantaneous values of the phase and neutral currents in the circuit. Therefore, the rated operating current only needs to avoid the normal leakage current value (MA level), which is very sensitive to cut off the ground fault and prevent direct contact electric shock. The air switch is a pure overcurrent trip (safety level).

　　Air switchUsed as main power protection switch or branch protection switch in household power supply. When a short circuit or overload occurs in residential lines or household appliances, it can automatically trip and cut off the power supply, effectively protecting these devices from damage or preventing accidents from expanding.

Families usually use two-pole (I. e. 2P) circuit breakers as main power protection and single-pole (1P) as branch protection. If the rated current of the air switch circuit breaker is too small, the circuit breaker is prone to trip frequently, causing unnecessary power outages. If it is too large, the expected protection effect cannot be achieved. Therefore, the correct choice of domestic circuit breaker rated capacity current is very important.