广告灯箱是弱电还是强电
本文目录一览
- 一、What is a power box? What is a weak current box? What equipment and appliances are these two used on?
- 二、What is the difference between strong electricity and weak electricity?
- 三、What is strong electricity and weak electricity? What does weak electricity include?
The power box is connected to the power bureau. The most recent ones are 220-volt residential electricity or 380-volt industrial electricity. Weak wires are often the access boxes for cable TV and communications networks.
The concept of strong electricity is relative to weak electricity. The division between strong electricity and weak electricity is based on voltage. The working voltage above 220V is strong electricity, and the working voltage below 220V is weak electricity. \r\nStrong electricity category: Electric power projects (above 10KV) and power supply and distribution projects (10KV/380V/220V) all belong to strong electricity. Strong current equipment includes: high-voltage circuit breakers, high-voltage cabinets, transformers, sockets, etc. These devices are characterized by operating voltages above 220V. \r\nWeak current category: Communication engineering, security monitoring, fire alarm and electronic information all belong to weak current. Weak current equipment includes: communication equipment, monitoring equipment, electronic equipment, etc. These devices are characterized by operating voltages below 220V. \r\nIdentification examples: 1. Strong electricity is not equal to power electricity. A lot of strong electricity is used for power, such as motors, air conditioners and elevators, but it is also used to power computers, televisions and other equipment. Another example is that the power of an electric vehicle is a 12V battery, which cannot be called strong electricity. \r\n2. It cannot be divided by frequency or AC and DC. For example, 800KV DC transmission must be strong power. \r\n3. Cannot be divided by current size. The working current of many high-voltage equipment can be very small, but the communication power supply has low voltage and high current. \r\n\r\nIn the power system, the voltage below 36v is called safety voltage, the voltage below 1kv is called low voltage, the voltage above 1kv is called high voltage, and the line that directly supplies power to users is called distribution line. If the user voltage is 380/220v, it is called a low-voltage distribution line, which is what is called strong electricity in home decoration (because it is the highest voltage used in homes). Strong electricity generally refers to AC voltage above 24V. For example, the voltage of lights and sockets in homes is 110V~220V. Electrical appliances such as lighting fixtures, electric water heaters, heaters, refrigerators, televisions, air conditioners, and audio equipment in household electrical appliances are all high-voltage electrical equipment. \r\nThe intelligent system is a compre hensive system composed of building equipment monitoring system, security system, communication network system, information network system, automatic fire alarm and fire linkage system for the purpose of centralized monitoring, control and management; in the home Various data collection, control, management and communication control or network system lines are called intelligent lines (also known as weak current in home decoration). Weak current generally refers to DC circuits or audio, video lines, network lines, and telephone lines. The DC voltage is generally within 24V. Among household electrical appliances, electrical appliances such as telephones, computers, and TV signal inputs (cable TV lines) and audio equipment (output lines) are all weak-current electrical equipment. \r\n\r\nThe main difference between strong electricity and weak electricity is their different uses. Strong electricity is used as a power source, and weak electricity is used for information transmission. \r\nSpecifically, they have the following differences:\r\n(1) Different AC frequencies\r\nThe frequency of strong electricity is generally 50Hz (hertz), which is called "power frequency", which means industrial electricity Frequency: The frequency of weak electricity is often high frequency or ultra-high frequency, measured in KHz (kilohertz) or MHz (megahertz). \r\n(2) Different transmission methods\r\nStrong electricity is transmitted through transmission lines, while the transmission of weak electricity is divided into wired and wireless. Radio transmits by electromagnetic waves. \r\n(3) Power, voltage and current are different\r\nHigh-voltage power is measured in KW (kilowatt), MW (megawatt), voltage is measured in V (volt), KV (kilovolt), and current is measured in A (ampere), kA (kiloampere); weak current power is measured in W (watt), mW (milliwatt), voltage is measured in V (volt), mV (millivolt), current is measured in mA (milliamp), uA ( Microampere) meter, so its circuit can be composed of printed circuits or integrated circuits. \r\n\r\nOf course, there are also high-frequency (hundreds of KHz) and medium-frequency equipment in strong electricity, but the voltage is higher and the current is larger. Another example is that although the voltage of flashlights and electric shavers is very low, the power and current are very small, they are still strong electricity. Due to the development of modern technology, weak current has penetrated into the field of strong current, such as power electronic devices, wireless remote control, etc., but these can only be regarded as the weak current control part of strong current, which is still different from the controlled strong current.
Strong electricity usually refers to electricity with an AC voltage above 24V, such as lamps and sockets in homes. Their voltages are generally between 110V and 220V. Household electrical equipment, such as lighting, water heaters, heaters, refrigerators, televisions, air conditioners, and audio equipment, all fall into the category of strong electricity.
Weak current refers to circuits whose DC voltage is generally within 32V, including audio, video, network and telephone lines, etc. Weak current technology is mainly divided into two categories:
1. Nationally stipulated safety voltage levels, including AC and DC voltages. Usually AC voltage is below 36V and DC voltage is below 24V, such as 24V DC control power supply or emergency lighting. backup power supply.
2. What people usually call weak current technology refers to technology that carries information such as voice, image, data, etc., such as telephone, television and computer information.
With the development of technology, weak current technology is increasingly used in intelligent buildings, such as intelligent fire protection systems, monitoring systems, computer networks, building automation and intelligent broadcasting. The degree of application of these technologies determines the degree of intelligence of smart buildings.
Weak current system engineering mainly refers to the second category of technical applications, including:
1. Television signal engineering, such as television monitoring systems and cable TV.
2. Communication engineering, such as telephone system.
3. Intelligent fire protection engineering.
4. Sound amplification and audio engineering, such as community background music broadcasting and building background music systems.
5. Integrated wiring project, mainly the application of computer network.
Weak current system protection refers to systems below 36VAC and 24VDC, including building automation equipment systems, security systems, intelligent property management systems, network information service systems, fire alarm systems, etc. Among them, the security system covers closed-circuit television monitoring, security alarm, perimeter defense, access control, visitor intercom and electronic patrol, etc. Intelligent property management systems include intelligent parking lots, intelligent cards, radio and background music systems, etc. Network information service systems include information services such as satellite reception, cable TV, integrated wiring and broadband networks.
The above is the relevant content of weak current, I hope it can help you understand better.
Weak current refers to circuits whose DC voltage is generally within 32V, including audio, video, network and telephone lines, etc. Weak current technology is mainly divided into two categories:
1. Nationally stipulated safety voltage levels, including AC and DC voltages. Usually AC voltage is below 36V and DC voltage is below 24V, such as 24V DC control power supply or emergency lighting. backup power supply.
2. What people usually call weak current technology refers to technology that carries information such as voice, image, data, etc., such as telephone, television and computer information.
With the development of technology, weak current technology is increasingly used in intelligent buildings, such as intelligent fire protection systems, monitoring systems, computer networks, building automation and intelligent broadcasting. The degree of application of these technologies determines the degree of intelligence of smart buildings.
Weak current system engineering mainly refers to the second category of technical applications, including:
1. Television signal engineering, such as television monitoring systems and cable TV.
2. Communication engineering, such as telephone system.
3. Intelligent fire protection engineering.
4. Sound amplification and audio engineering, such as community background music broadcasting and building background music systems.
5. Integrated wiring project, mainly the application of computer network.
Weak current system protection refers to systems below 36VAC and 24VDC, including building automation equipment systems, security systems, intelligent property management systems, network information service systems, fire alarm systems, etc. Among them, the security system covers closed-circuit television monitoring, security alarm, perimeter defense, access control, visitor intercom and electronic patrol, etc. Intelligent property management systems include intelligent parking lots, intelligent cards, radio and background music systems, etc. Network information service systems include information services such as satellite reception, cable TV, integrated wiring and broadband networks.
The above is the relevant content of weak current, I hope it can help you understand better.