Electrical dianliao common sense lighting and power distribution system

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a, lighting and power distribution system is part of the

lighting distribution system respectively by lighting distribution box, fuse, leakage protector, mini circuit breakers.

1, lighting distribution box, distribution box is divided into vertical cabinet, Ming assembly electric box and dark assembly three electrical box. Distribution box the size of the specifications of the distinction between have certain requirements.

　　( 1) Made cabinet distribution box is generally used to plot main distribution system, the hub of power supply for the district, because of the electricity load is very big, must have certain heat dissipation space design placement.

　　( 2) Ming electric box is generally used in assembly installed in unfavorable changes position on the wall of such as high-rise residential setting wall surface.

　　( 3) Dark assembly electric box generally applicable to offices and households, because its not occupied housing floor space, and more beautiful, is a kind of ideal family often choose the products.

2, leakage protector can be divided into electronic and magnetic two forms of protection. Installation forms can be divided into used directly installed on the wall panel and guide modular panel.

the difference between electronic leakage switch and magnetic leakage switch

the starting of electronic leakage switch, is to use wire with zero potential difference principle, namely with the aid of ( Electronic circuit board) Operational amplifier of the secondary voltage changes to start electronic induction coil, therefore there is not safety factor.

the following enumerated five kinds of situation that electronic leakage switch relatively unsafe factors

( 1) If electronic leakage switch is installed in the bathroom type steam high moisture, is likely to happen frequently switch misoperation, the main reason is that water molecules are charged conductive body.

　　( 2) Power grid voltage instability region ( Too high or too low) Switch is not action.

　　( 3) (the phase line and the line PE line and PEN) Short circuit fault, which reduces the power grid voltage, affect the switching action.

　　( 4) Lightning occurs or operating overvoltage, electronic components of the voltage sensitive, cause problems for switch action.

　　( 5) A high-frequency electromagnetic wave, causing improve tripping current, switch are prone to misoperation.

the advantages of electromagnetic leakage switch is

of electromagnetic leakage switch phase line and zero line at the same time through the leakage inductor, when no earth leakage occurs, through the phase line current L2 and through the magnetic field generated by the zero line current LN M2 and MN should be equal, ( Known as the current flow into the outflow of equal) , as long as it doesn't produce potential, electromagnetic induction coil doesn't work, so that a relatively safe form of leakage protection.

some of electromagnetic leakage switch inside the micro filter, isolation capacitance and electromagnetic membrane separator, at the same time can resistance to lightning strike, anti mutation function of current and surge current shock resistance.

electronic leakage protection switch and the working principle of electromagnetic leakage protection switch.

China lighting network Feng Yaoyuan

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