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A brief introduction of the welding machine cable
Welding machine cable commonly known as the welding line, is rubber-insulated cable category, is used to weld the secondary side of the welding machine and connect the welding clamp, welding machine special cable, its characteristics are: current, low voltage. The sheathing material is a mixture of natural rubber or neoprene, while the neoprene rubber sheath has heat resistance, oil resistance, and non-flammability. Therefore, it can be applied to different occasions.
The electric welding machine cables are all single-wire cores. The conductors are oxygen-free copper. The diameter of the copper wire is small and the number of roots is large. Generally, multiple copper wires are twisted to form strands, and then multiple strands are stranded to form conductors. Therefore, the welding machine cables are used. The body is relatively thick, with hundreds of copper wires. The conductor is surrounded by a layer of heat-resistant polyester film insulation. Model yh cable, insulated and sheathed into a layer, thicker than 1.8mm, the material is a natural rubber mixture; model yhf cable has two kinds of cover layer, one is a mixture of neoprene, the other The rubber compound is used as the insulation and the neoprene mixture is used as the sheath. The specifications of commonly used welding machine cables are 16 square, 25 square, 35 square, 50 square, 70 square, 95 square, 120 square and so on.
Second, the welding machine cable several characteristics
1. The yh cable operates under low voltage (maximum voltage of 200v) with high current and requires a certain degree of patience.
2. The long-term allowable working temperature of the welding wire cable should not exceed 65°C.
3. Motor lead wire cables are frequently moved, twisted and applied, requiring soft and good bending performance.
4. It is easy to be scratched and rubbed by sharp steel components during casting, so it is required that the cable insulation has good mechanical properties such as tear resistance, wear resistance, and the like.
5. The use of complex environmental conditions, such as sunlight, water boiling, contact with mud, oil, acid and alkali liquids, etc., require a certain degree of weather resistance and oil resistance, solvent resistance.
6. Heat welded parts are sometimes encountered, requiring good heat distortion resistance.
7. Regular movement requires small outside diameter and light weight. Due to the low electrical requirements of such cables and the complex use of environmental conditions, it is not appropriate to meet various complicated environmental factors in the structure. When using, pay attention to improving the conditions of use to prevent external damage.
Third, the choice of welding machine cable
The length of the primary power cord of the welding machine is generally not less than three meters in length. The cross-sectional area may have a current density of 4-6a per square millimeter. The following rated current may be 30-50a, 60-80a, 100a, 120-150a, respectively. The 200a, 300a, and 360-400a are respectively taken to be 10 mm2, 16 mm2, 25 mm2, 35 mm2, 50 mm2, 75 mm2, and 90 mm2.
Welding cable can be used for welding special yhh type rubber sleeve software cable and yhhr special soft soldering cable. The selection of welding cables should be considered from both temperature rise and voltage drop. For the length of 20 meters or less can ignore the impact of the pressure drop, and only select by current, the current density can be taken 4-10a per square. Listed under different lengths of different currents, the selection of the cross-sectional area of ​​the welding cable. Length 20 meters, 30 meters, 40 meters, 50 meters, 60 meters, 70 meters, 80 meters, 90 meters, 100 meters. 100a are respectively 16,25,25,35,35,50,50,60,60 square millimeters; 150a are respectively 25,35,35,50,50,60,60,70,70 square millimeters; 200a are 25,35,35,50,50,60,60,70,70 square millimeters; 300a are 35,50,50,60,60,70,70,85,85 square millimeters respectively; 400a are 50, respectively. 60, 60, 70, 70, 85, 85, 95, 95 square millimeters; 500a are 60, 70, 70, 85, 85, 95, 95, 120, 120 square millimeters respectively; 600a are 70, 85, 85, 95 respectively, 95,120,120135,135 square millimeters.
Fourth, welding machine cable use and maintenance
1. This device is not repairable, its various protection characteristics are regulated by the manufacturer and cannot be arbitrarily adjusted;
2. If the arc welding machine has air cooling and the main circuit has contactor, the fan and contactor coil power supply should be connected to the input power terminal of the device;
3. Observe the status of the protector indicator before each use. The red indicator is the power indicator. The green indicator is the safe voltage indicator. The normal status is: the green indicator lights up when not soldering and goes out when soldering. If it is found that the welder is not soldering, it will be green. When it is off, it means that the protector has lost its protection and should be immediately disabled.
Welding machine cable product analysis
Introduction: The welder cable is particularly soft and has good bending properties. Therefore, it is very suitable for secondary voltage wiring and connection of electric welding machines for ground voltage AC communication not exceeding 200V and pulsating DC peak 400V welding machine. This article today analyzes the characteristics, selection, use and maintenance of the electric welding machine cable for everyone to learn from.