The contact resistance of the tail wire contact of AAAC Cable terminal (especially outdoor, sometimes connected by copper aluminum two different metals) will increase under the influence of long-term load and fault current, which will lead to overheating. When the line fails, the fault current flows through the contact, which will burn the contact. Measuring … Read more
National standard ACSR Cable, literally, is the wire and cable produced in strict accordance with national standards. China has clear regulations on the appearance, mechanical strength, insulation of sheath, withstand voltage strength and line resistance of cables. There are different national standards for different types of cables, mainly as follows: ·Executive standard for irradiation crosslinked … Read more
The intact cable sheath can effectively protect the insulation: it can prevent liquid water from immersing in the insulation, and the enclosed metal sheath can also prevent moisture from diffusing into the insulation, so it can obviously prevent the formation of water branches in PE / XLPE insulated cables. The sheath and anti-corrosion layer test … Read more
The most commonly used label for ACSR Cable identification is covered with protective film. This kind of label is sticky and has a layer of transparent protective film outside the printing part, which can protect the label printing font from abrasion. In addition, single cable / jumper can also use non coated label, flag label … Read more
Dancing a 700 meter long ultra-high voltage AAAC Cable that is thick at the mouth of the bowl and runs 3 kilometers underground, what are you doing? How many people will that take? How fierce is that? How hard is it to control? On May 27, with a series of questions, the author came to … Read more
Small insulation resistance is often encountered in AAC Cable production, which is affected by many factors. In fact, there are four main factors that have a great influence on the coefficient of insulation resistance. 1、 The influence of temperature With the increase of temperature, the insulation resistance coefficient decreases. This is due to the increase … Read more
01 Project background If the city grid is given life, the AAAC Cable is his blood vessel, which injects the energy of the power grid. However, with the development, the construction frequency is high, which leads to the explosion of the risk of cable external force damage. Please see, this is the scene after the … Read more
The structure of mineral insulated ABC Cables with different names is convenient for us to design and select better, and there is no confusion about many naming rules. What are (rigidity) and (flexibility)? For a long time, the domestic mineral insulated cables are divided into two types: rigidity and flexibility. The internationally used magnesium oxide … Read more
Definition of filling coefficient on AAAC Cable Manual: ratio of actual cross-sectional area of conductor to cross-sectional area of core outline Filling coefficient of circular core = sum of cross-sectional area of each single line / circumcircle area of stranded core Fan, pad core filling factor = sum of each single line cross-sectional area / … Read more
UL standard In UL standard, the common temperature resistance grades are 60 ℃, 70 ℃, 80 ℃, 90 ℃, 105 ℃, 125 ℃ and 150 ℃. How do these temperature ratings come? Is it the long-term operating temperature of the conductor? In fact, these so-called temperature ratings are called rating temperature in UL standards. It … Read more