Some knowledge points of wire and cable, wire and cable professional manufacturers tell you

Release time： 2022-09-14 13:17

【Summary description】 Professional manufacturers of wire and cable think that when detecting the DC resistance of wire and cable, the actual conductivity of wire and cable should be detected first. Therefore, DC resistance data can directly reflect the quality of data in wire and cable and the primary conductivity of wire and cable. In the actual test, when the actual section width of the wire and cable is larger than normal, the greater the current through the wire and cable, the greater the resistance, and vice versa.

Wire and cable professional manufacturers believe that household wire, electrical equipment with wire and cable, usually BV line (hard wire) and BVR line (soft wire). Used for lighting, electrical equipment, etc. BV cable has an inherent advantage in price. In addition, hard wire tensile, extrusion resistance, corrosion resistance is much stronger than BVR wire. Let BV line become the main force in the home improvement market. BVR cable is usually used in communication, instrument and other places. The carrying capacity of BVR cable to high-frequency current is much higher than that of BV cable.

电线电缆的一些知识点，电线电缆专业生产厂家告诉你

Professional manufacturers of wire and cable think that when detecting the DC resistance of wire and cable, the actual conductivity of wire and cable should be detected first. Therefore, DC resistance data can directly reflect the quality of data in wire and cable and the primary conductivity of wire and cable. In the actual test, when the actual section width of the wire and cable is larger than normal, the greater the current through the wire and cable, the greater the resistance, and vice versa. In addition, in the case of constant current, wire and cable, the better, the conductivity of the data, the better, and vice versa. It is clearly stipulated in the national wire specification that the conductor resistance is large at 20, which proves that the resistance value of wire and cable at 20 is closer to the standard value, the more qualified the sample is, otherwise it is unqualified.

Wire and cable manufacturers believe that in the detection of DC resistance, bridge method and current method are the main methods. Bridge method is mainly divided into single - arm bridge method and double - arm bridge method. When the resistance value is greater than 1 ohm, the single-arm bridge method is selected. When the resistance value is less than 1 ohm, the double-arm bridge method is used. Another method is the current method, also known as the microohm method. This method can predict according to different resistance, and then select different current for detection. This method has a larger measuring range than the bridge method. In addition, to reduce errors and negative effects in sub-A measurements, A four-terminal measurement tool can be used. In this way, the test results are both convincing and credible.

Professional manufacturers of wire and cable believe that the types and characteristics of wire and cable:

1. Bare conductor: wires without insulation layer, mainly used for outdoor overhead use.

2. Electromagnetic wire: The wires used on the electromagnetic coil are electromagnetic wires. Electromagnetic wire has very high technical requirements for wire, and needs to adapt to strong vibration, centrifugation, high temperature, corrosion and other harsh environment.

3. Power cable: Mainly used for conveying and distributing electric energy. It is characterized by the conductor coated with oil - impregnated paper, rubber or plastic. This kind of cable has strong corrosion resistance and insulation, can withstand high voltage, and has low requirements on the operating environment.

4. Wire and cable professional manufacturers think electrical equipment with wire and cable, is one of the daily life common wire is mainly used for electrical equipment and instrumentation of assembling shunt and electrical energy.

5. Communication cable: mainly used to transmit TV, telephone, network, broadcast signals, etc. It is characterized by large signal capacity and strong anti-interference ability.