What are weak current and strong current?
Weak current: generally refers to DC circuits or audio, video lines, network lines and telephone lines, and the DC voltage is generally within 36V.
Strong electricity: refers to the power part in the electrical field. It is relative to weak current.
The difference between strong current and weak current
1, AC frequency is different.
The high-voltage frequency is generally 50Hz, which is called? Power frequency? The frequency of industrial electricity: the frequency of weak electricity is often high frequency or ultra-high frequency, measured in KHz (kilohertz) and MHz (megahertz)
2. Different transmission modes
Strong electricity is transmitted through transmission lines, and weak electricity is transmitted through wires or wireless. Radio is transmitted by electromagnetic waves.
3. Power, voltage and current are different.
Electric power is in kilowatts and megawatts, voltage is in volts and kilovolts, and current is in amperes and kiloamperes; Weak current is in watts and milliwatts, voltage is in volts and millivolts, and current is in milliamps and microamperes, so its circuit can be composed of printed circuits or integrated circuits.
How to distinguish weak electricity from strong electricity
1, the basic element of how to distinguish strong current from weak current is voltage. High voltage design has high voltage, usually greater than or equal to 220 V; The voltage below 220V is weak current.
2. Strong electricity conducts electric energy and weak electricity conducts signals. For example, electric shavers and flashlights conduct electric energy, which belongs to the category of strong electricity. Just because its power supply is two dry batteries and the voltage is small, it is very incorrect to judge that it is weak.
3. High voltage includes high voltage and does not necessarily belong to high voltage; Low voltage includes weak current, which must belong to low voltage; Low voltage is not necessarily strong electricity, and strong electricity is not necessarily low voltage.
4. High-voltage wires are made of thick plastic insulation layer, and the copper core wire has a large diameter, and the inner copper conductor is composed of one or more bare wires. The voltage and current of weak current conductor are not large, so the insulation layer is relatively thin, and the diameter of copper core wire is relatively small, which is composed of more than 2 strands of insulated thin conductor.
The above is the information I brought to you about what is weak electricity and how to distinguish weak electricity from strong electricity. I hope everyone can understand it, which is still useful for their future life. I hope I can help you. If you want to know other relevant information, please continue to pay attention to this website, so please look forward to more exciting information!