Where there is no leakage protector, the air switch plays the role of electrical protection small expert, it can monitor the current in the circuit, when the current exceeds a certain value will trip.
For example, a few kinds of high-power electrical appliances were used at the same time, resulting in overload of line load, it will trip, had the effect of fuse.
Many air switches have both leakage protection and overload, short circuit protection function, basically achieve the dual function of air open and leakage protection, choose this switch as the total control switch of the family line, simple and safe.
When the current in the protected home grid exceeds the general control limit current, it will cut off the live line and the neutral line at the same time.
In this arrangement, the total control switch is equipped with leakage protector, and the switches used by other branches are air switches without leakage protection.
Advantages: as long as each branch of the line has a leakage trip standard, the total control switch will trip, high security.
Disadvantages: Once the master control switch trips, all branches in the whole family circuit will be cut off, which will lead to other normal electrical appliances in the circuit can not be used normally.
Another installation method of leakage protector for household distribution box:
According to this way of layout, the total control switch does not have leakage protection function, kitchen and socket leakage shock prone branch control switch leakage protection, other branches are only equipped with ordinary air switch.
Advantages: a branch leakage, the total control is not tripping, but the branch power, does not affect the normal use of other branches of electrical appliances.
Weakness: safety compares on a kind of decorate way almost.
In this way note: in the home circuit, as long as there is a possibility of contact with the circuit when charged, it is necessary to install leakage protector. For instance the toilet that has electric water heater, washing machine, induction cooker, dishwasher again and kitchen loop.
Or, change all switches to have leakage protection function, including the main control and branch, which branch out of the problem which switch, unless the bus problem, otherwise the main switch will not jump. It's expensive, but safer.
