强电和弱电的区别(国外英文资料).doc

强电和弱电的区别(国外英文资料) The difference between a strong and a weak one The difference between strong and weak electricity The idea of strong and weak electricity is generally easy to distinguish, and the main difference is the use. Strong electricity is used as a power source, and weak electricity is used for information transmission. In particular, they have the following differences: 1, the frequency of communication is different High voltage frequency is 50 hz (h), called frequency, which means industrial frequency: the frequency of weak current is often high frequency or high frequency, in KHz (KHz), MHz (MHz). The transmission is different Strong electricity is transmitted by transmission lines, and the transmission of weak electricity is wired and wireless. Radio waves are transmitted by electromagnetic waves. Power, voltage and current size are different The electric power is measured in terms of KW (KW), MW (MW), voltage, V (V), and KV (KV), and the current is measured in A (ampere), kA (kilo-ampere). Low voltage power (watts), mW with W (milliwatts) meter, voltage to V (V), mV (mV), current in mA (mA), uA microampere meter, so the circuit can use printed circuit, or IC. Of course, there are also high frequencies (hundreds of KHz) and medium frequency devices in the power grid, but the voltage is higher and the current is larger. Also like flashlight and electric razor although the voltage is very low, power and current is very small, still belong to strong electricity. Due to the development of modern technology, weak current penetration in the field of high voltage, such as power electronic devices, wireless remote control, etc., but these can only be classified as high voltage in the weak current control part, it accused the heavy current is different. In the field of construction electrical technology, people are used to divide it into strong electricity and weak (information). , there are both connection and difference in general heavy current processing objec