Summary of the construction technology of weak current engineering - Chinahourly

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1. Why can't the construction method of strong electricity be applied to weak electricity construction?
A: Generally speaking, the processing of high-voltage power is such as high-current, high-voltage, high-power, low-frequency power equipment and lines. The main problems to be considered are to reduce losses and improve efficiency. Information, that is, information transmission and control, is characterized by low voltage, small current, weak power, and high frequency. The main consideration is the effect of information transmission, such as the fidelity, speed, breadth, and reliability of information transmission. Weak electrical projects include television engineering, weak electrical security communications engineering, fire engineering, security engineering, imaging engineering, etc. and integrated wiring engineering for the above projects. Therefore, there are great differences in the methods and methods of construction. For example, strong power generally does not have the problem of impedance matching, but impedance matching is a very important problem for weak current. If the signal of the weak current system encounters a medium with impedance mismatch during transmission, it will produce reflection, which will seriously degrade the strength of the signal and hinder the smooth transmission of the signal. Reflections occur mostly in joints and interfaces, so the technical requirements for weak current system construction are much higher than those for high-voltage construction. With the development trend of “light into copper retreat” in the transmission system, the difference between the two will become larger and larger.
Second, why should we understand the installation points of weak current system construction?
A: The weak current system refers to all power systems that work below the 36V safe voltage. Its installation has its special requirements.