What are strong current, weak current and weak current, including what?

What is strong current and weak current? What does weak current include? I believe many people are at a loss. I have compiled some knowledge about weak current for your reference.

Strong electricity generally means that the AC voltage is above 24V. For example, the voltage of lamps and sockets at home is 1 10V~220V. Household appliances such as lighting fixtures, electric water heaters, heaters, refrigerators, televisions, air conditioners and audio equipment all belong to high-voltage electrical equipment. Weak current generally refers to DC circuits or audio, video lines, network lines and telephone lines, and the DC voltage is generally within 32V.

Weak current is mainly divided into two categories, including the following two categories.

First of all, low-voltage electric energy, such as safe voltage grade stipulated by the state and control voltage, can be divided into alternating current and DC. Usually, the alternating current is lower than 36V and the DC is lower than 24V, such as 24V DC control power supply or emergency lighting standby power supply.

Second, people habitually refer to weak current technology as weak current technology. Generally speaking, it refers to information sources including voice, images, data and other information, including telephone, television and computer information. The basic meaning of weak current technology in intelligent buildings visible to human eyes is still weak current technology in the original sense. With the development of modern weak current technology, the weak current technology in intelligent buildings is more and more widely used in the real society. For example, intelligent fire control system, monitoring system, computer network, building automation, intelligent broadcasting, etc. The application degree of weak current technology determines the intelligence degree of intelligent building.

Weak current system engineering generally refers to the second application. Mainly includes the following points:

1, TV signal engineering, such as TV monitoring system and cable TV.

2, communication engineering, such as telephone.

3. Smart fire protection project.

4. Sound reinforcement and sound engineering, such as background music broadcasting in residential areas and background music in buildings.

5. Integrated wiring project, mainly the application of computer network. Because with the rapid development of computer technology, the functions of software and hardware are increasingly powerful, and various weak current system engineering and computer technology can form a perfect combination. The previous classification is no longer as clear as before, and various projects are integrated with each other and become system integration.

Then what is weak current system protection?

Mainly refers to below 36 volts AC voltage and below 24 volts DC voltage. Including building equipment system, security system, intelligent property management system, network information service system and fire alarm system.

Security system includes CCTV monitoring system, security alarm system, perimeter prevention system, access control system, visitor intercom system, electronic patrol system, etc. Intelligent property management system includes intelligent parking system, smart card system, broadcasting and background music system, etc. The network information service system also includes satellite receiving and cable TV system, integrated wiring system and broadband network information service system.

Weak current roughly includes these capacities. Have you got the general idea?