1. Common faults of empty overhead cable lines 1. Overhead line failure ①Short circuit and damage of wires. The reasons that cause short circuit and damage to the wire are: a. The distance between the wires and wires is small, and the flatness of the three-phase wires is different. It is very easy to cause … Read more
The degree of crosslinking (hot extension) is unqualified If the degree of cross-linking fails to meet the standard, the thermal-mechanical properties of the aac cable are unqualified and cannot meet the requirement of 90°C working temperature. The reasons for the unqualified cross-linking degree are the unqualified formula and the improper type and ratio of the … Read more
1. Copper and aluminum monofilament drawing Commonly used copper and aluminum rods for wires and cables, at room temperature, use a wire drawing machine to pass through one or several stretch die holes to reduce the cross-section, increase the length, and increase the strength. Wire drawing is the first process of various wire and abc … Read more
Factors affecting Aerial Bundled Cable (ABC) SANS 1418 Standard and placement in the wiring six factors affecting cable performance: Ultraviolet (UV)– Do not use cables without UV protection in direct sunlight. Heat — The temperature of the cable in the metal tube or groove is very high, and many polymeric materials will degrade their service … Read more
The crosslinking degree (thermal elongation) is not acceptable If the crosslinking degree is not up to the standard, the thermal and mechanical properties of the cable are not qualified and can not meet the requirements of the working temperature of 90℃. The reasons for the unqualified crosslinking degree are as follows: first, the formula is … Read more
The rate of plastic extrusion According to the flow rate analysis of the viscous fluid in the material conveying and homogenizing section of the ABC conductor, the flow rate of the plastic (that is, the extrusion speed) is proportional to the screw speed, and the screw speed is an important operating variable to characterize the … Read more
Environmental protection wire refers to the material is environmental protection wire. The material includes insulating material, conductor material and shielding material. Insulation such as PVC, irradiated cross-linked PVC (XL-PVC), irradiated cross-linked polyethylene (XL-PE), low smoke free (Halogen-free), silicone rubber, Teflon Telflon and so on. The environmental protection of insulation materials is mainly the EU’s RoHS … Read more
In today’s wire and cable market, product quality levels are uneven, and production companies are mixed. Many Party A simply uses price as the procurement standard, which breeds a market for substandard products. So that when users are faced with different prices of “national standard cables”, they will be at a loss, not knowing how … Read more
1. What are the requirements for cable piping? Answer: (1) The distance from the top of the pipe to the ground is 0.2m in the workshop, 0.5m under the sidewalk, and 0.7m in general areas; (2) Pipe pits should be installed at the change direction and branch, and pits should also be added when the … Read more
The advantage of aluminum alloy cable over ordinary cables is that under the same volume, the actual weight of aluminum alloy is about one-third of copper. According to this calculation, under the premise of meeting the same electrical conductivity, the length of the aluminum alloy cable with the same weight is twice that of the … Read more