The Spring Festival is coming, meaning that spring is coming. Have you just started to spend the winter and the snow in the winter, have you started planning the renovation of the spring? Maybe you just bought a new house and are ready to be fully renovated. Maybe you want to transform the old house into a more fashionable and practical one. The living house Xiaobian collects a lot of information about the decoration of the home, I believe it can help you make your home more comfortable.
I. Components of the lighting and distribution system
The lighting distribution system consists of a lighting distribution box, a fuse, a leakage protector, and a miniature circuit breaker.
1. Lighting distribution box is divided into three types: vertical cabinet type distribution box, Ming assembled electric box and dark assembled electric box. There are certain requirements for the size and size of the distribution box.
(1) Vertical cabinet power distribution box: It is generally used in the main power distribution system of the community. It is the power supply hub of the whole community. Because of the large load of electricity, there must be a certain heat dissipation space when designing and installing.
(2) The assembled electrical box is generally used for installation on a wall that is not suitable for modification, such as a concrete wall on a high-rise residential building.
(3) Dark-mounted electrical boxes are generally suitable for offices and households. Because they do not occupy the floor space of the house and are more beautiful, they are an ideal product for families.
2. The leakage protector can be divided into two types: electronic and electromagnetic protection. The mounting form can also be divided into panels for direct mounting on wall panel panels and rail modules.
The difference between the electronic leakage switch and the electromagnetic leakage switch:
The start of the electronic leakage switch is based on the principle of the potential difference between the live line and the neutral line, that is, the electronic induction coil is activated by the variation of the auxiliary voltage of the (electronic circuit board) operational amplifier, and thus there is an unsafe factor.
The following five examples illustrate the relatively unsafe factors of the electronic leakage switch:
(1) If the electronic leakage switch is installed in a humid place with high steam in the bathroom, the switch may malfunction frequently, mainly because the water molecules are charged conductors.
(2) The switch in the unstable grid voltage (too high or too low) does not operate.
(3) A short-circuit fault occurs in the phase line and the protection line (PE line and PEN), causing the grid voltage to drop and affecting the switching action.
(4) In the event of lightning strikes or overvoltages, the electronic components are sensitive to voltage and cause switching difficulties.
(5) High-frequency electromagnetic waves appear, which causes the trip current to increase, and the switch is prone to malfunction.
The advantages of the electromagnetic leakage switch are:
The phase line and the neutral line of the electromagnetic leakage switch pass through the leakage induction coil at the same time. When no earth leakage occurs, the magnetic field M2 generated by the phase line current L2 and the current LN passing through the neutral line should be equal to MN (that is, usually The current flowing in and out is equal), as long as the potential difference is not generated, the electromagnetic induction coil does not work, so it is a safer form of leakage protection.
Some electromagnetic leakage switches are equipped with micro-filters, isolation capacitors and electromagnetic diaphragms. They are also resistant to lightning strikes, sudden currents and surge current surges.
The working principle of the electronic leakage protection switch and the electromagnetic leakage protection switch are compared.
Editor: China Lighting Network Feng Yaoyuan
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