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Cable knowledge | The basics of wire and cable

Cable knowledge | The basics of wire and cable

communication cable and optical fiber cable ---- communication cable is the transmission of telephone, telegraph, television, broadcast, fax, data and other telecommunications information cable. HYVMHYVSYV-75 RF cable originally produced.
The use and type of various cables, the correct representation of cables

The use and type of various cables, the correct representation of cables

The nominal cross-section is an approximation of the cross-section of the guide body. In order to achieve the specified DC resistance, easy to remember and unified and specified a conductor cross-section near a whole value. China's unified provisions of the conductor cross-section are 0.5, 0.75, 1, 1.5, 2.5, 4, 6, 10, 16, 25, 35, 50, 70, 95, 120, 150, 185, 240, 300, 400, 500, 630, 800, 1000, 1200, etc.. It should be stressed here that the nominal cross-section of a conductor is not the actual cross-section of the conductor, which is smaller in many cases and larger in a few cases than the nominal cross-section. In the actual production process, as long as the DC resistance of the conductor meets the specified requirements, it can be said that the cross-section of the cable is up to standard.
Why does the motor start with a high current? After starting, the current is low again?

Why does the motor start with a high current? After starting, the current is low again?

The frequency converter is a modern motor control device with greater technical content, full control function and good control effect. It regulates the speed and torque of the motor by changing the frequency of the grid. Because they involve power electronics and microcomputer technology, they are costly and require a high level of maintenance technicians, so they are mainly used in areas where speed regulation is required and where high speed control is required.
Electricity knowledge of power short circuit fault prevention measures

Electricity knowledge of power short circuit fault prevention measures

When installing and overhauling electrical equipment with electricity, it is important to prevent miswiring and misoperation, and to take measures to prevent short-circuiting when working in close proximity to live parts. In normal times, strengthen management to prevent small animals from entering the distribution room and climbing onto electrical equipment, and remove conductive dust in time to prevent conductive dust from entering electrical equipment.
Electricity knowledge of electrical equipment overhaul solutions

Electricity knowledge of electrical equipment overhaul solutions

The overhaul and maintenance of electrical equipment is a process that must be carried out during the operation of electrical equipment. With the progress and development of science and technology, the operation of electrical equipment in China is receiving more and more attention, and more people are gradually paying attention to the operation of power plant equipment, so the overhaul and maintenance of electrical equipment has become one of the top priorities in the operation of power plants. The power plant must ensure the efficient and normal operation of electrical equipment through certain means, so as to ensure that the power plant can normally produce the electricity needed for the residents. At present, the use of electrical equipment in China often does not reach the intended life of the equipment, on the one hand, because of the existence of the power equipment itself.
What is earth resistivity in electricity?

What is earth resistivity in electricity?

As facilities add more modern and sensitive computer-controlled equipment, the problem of electrical noise is magnified. Since noise does not affect crude oil, older equipment may cause daily problems with newer equipment.

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