Low voltage circuit breaker (formerly known as automatic switch, air switch) small breaker box is a kind of switch that can not only make and break the normal load current and overload current, but also make and break the short circuit current.Low voltage circuit breaker in the circuit in addition to play a control role, but also has a certain protection function, such as overload, short circuit, undervoltage and leakage protection.Low voltage circuit breaker, commonly known as automatic air switch, is one of the main switching devices in low voltage distribution network. It can not only make and break the normal load current, motor working current and overload current, but also make and break the short circuit current.It is mainly used as a power switch in the low-voltage distribution line or switchgear (box) which is not frequently operated, and plays a protective role in the line, electrical equipment and motor. When they have serious overcurrent, overload, short circuit, phase break, leakage and other faults, it can automatically cut off the line and play a protective role.
There are many ways to connect Small Breaker Box, but the main ones are front board, back board, plug-in type and drawer type. This method of board is the most commonly used because it is more convenient and exposed to the outside. It is also very simple when it needs to be disassembled. It can also be seen by users in normal work, so most users will Adopting this wiring method in front of the board is convenient and fast, saving money and effort.
This wiring method behind the board is also very easy to accept. It has a big feature that if the user needs to replace the circuit breaker, or when the circuit breaker has a problem, there is no need to re-wiring, first understand the circuit breaker model. You only need to change the circuit breaker on the original basis, and its fixedness is relatively strong, and it is a bit weaker than the wiring on the front of the board.
Analysis of the reasons for the simultaneous tripping of the main switch and the branch switch of the household distribution box
1. The main switch of the household distribution box can generally choose a bipolar 32-63A small air switch Small Breaker Box or an isolation switch ;
2. The lighting circuit generally uses a 10-16A small air switch;
3. The socket circuit generally chooses an air switch of 16-20A;
4. The air switch of 16-25A is generally selected for the air-conditioning circuit;
5. Bipolar or 1P+N (phase line + neutral line) air switch is used. When the line has a short circuit or leakage fault, the phase line and neutral line of the power supply should be cut off immediately to ensure personal safety and the safety of electrical equipment. . The installation of the above air switch is for reference only. The actual electrical power of each household is different, and the specific electrical design shall prevail.
When the air switch is a three-phase switch, it is necessary to find out whether the incoming line is a three-phase circuit. If it is determined to be two-phase, the neutral wire should be connected to the neutral wire, the ground wire should be connected to the shell, and the live wire should be connected to any one. Generally, each air conditioner is divided into one channel, the kitchen and sanitary sockets are respectively divided into one channel, and the rest of the sockets can be divided into one or two channels according to the situation, and all lighting can also be divided into one or two channels. Outlet circuits that are expected to use high-power appliances can use a 20-amp air switch, otherwise a 16-amp air switch will suffice.
Hot Tags: small breaker box, suppliers, manufacturers, factory, customized, wholesale, price, for sale, free sample
