National Standard for Aluminum Alloy Cables National Strict Standard Restrictions

Aluminum alloy cable is a common cable in some circuits. It is a conductor with a particularly strong conductive function. This cable has undergone a special manufacturing process and adopted advanced scientific manufacturing technology to make it The performance of metal cables has been increased compared to previous ones. For example, it can be bent greatly and can be used for a long time whether placed in water or buried in the soil. The most important thing is that its conductivity has been improved. Even if the current exceeds the value and causes the cable to overheat, it will not have much impact on the conductivity of the cable. Below, Xiaotu introduces its national standards.

At present, aluminum alloy cables have gradually been recognized by the market, and an increasing number of users plan to choose aluminum alloy cables. However, due to lagging standards and supervision, it is difficult to distinguish good from bad in the market! Many companies that do not have aluminum alloy cable production technology and equipment are also actively promoting aluminum alloy cables, which has brought great difficulties to users' choices. Confused, here are some standards for users to use as a reference when choosing manufacturers and products, so as to choose truly high-quality aluminum alloy cables. First of all, try your best to choose a company that specializes in the production of aluminum alloy cables. Such a company only focuses on researching and making alloy cables, has more professional skills, more mature production skills and techniques, more complete production equipment, etc., and also has very good technical services. It is professional and Only by focusing and concentrating can you become better. The following is an identification of aluminum alloy cable manufacturers based on 10 standards such as aluminum alloy cable production technology, equipment, technology maturity, professional standards, and test reports for reference:

Investigation Standard 1: Product Quality Quality

Aluminum alloy cables are mainly composed of conductors, insulation and armor (sheath). Starting from the analysis of the three basic elements of aluminum alloy cables, we can roughly see the quality of aluminum alloy cables. .

(1) Aluminum alloy conductor rods: See if we can independently produce high-quality aluminum alloy conductor rods

Currently, domestic aluminum alloy conductor rods have independent production technology There are not many manufacturers, and even fewer have aluminum alloy conductor rod production lines capable of continuous smelting, continuous casting, continuous casting and rolling. If you do not have independent aluminum alloy conductor rod production capabilities, you must rely on outsourced processing and so-called secret smelting. , or other aluminum alloy conductor rods purchased from non-standard sources, not only cannot guarantee the basic quality of aluminum alloy cables, but also cannot control the quality of the cables from the source. In addition to the aluminum alloy conductor rod production line with melting, continuous casting, continuous casting and rolling, it also depends on the size of the cross-section of the billet continuously cast by the production line. The larger the cross-section, the better the quality of the rolled aluminum alloy rods. Excellent, "good steel comes out of many vicissitudes of life". High-quality aluminum alloy conductor rods are the decisive factor in the electrical and mechanical properties of aluminum alloy cables. Without high-quality aluminum alloy rods, the subsequent processes cannot be changed no matter how wire drawing, twisting, cabling, armoring, etc. The fundamental quality of its conductor.

(2) Insulation: There are three things to look at about insulation; degree of cross-linking, stranded conductors, and cable annealing of conductors

(1) Degree of cross-linking; aluminum alloy cables are better than copper cables One of the points is that all aluminum alloy cables are insulated with cross-linked polyethylene, and the cable working temperature is 90 degrees. Because of the use of cross-linked polyethylene insulation, there is a question of cross-linking degree. Standard professional aluminum alloy cable manufacturers should have a dedicated cross-linking room.

(2) Stranded conductor; Looking at the stranding technology of the conductor and the conductor stranding production line, the current stranded conductor equipment in the domestic cable industry is basically the same. The produced stranded conductors usually produce aluminum Chips and burrs harm the insulation, affect the insulation effect, cause safety hazards and shorten the insulation life. The most advanced stranded conductor equipment is a split-motor type, PLC program-controlled nanotechnology conductor stranding equipment. Using this leading technical equipment, microcomputer controlled production programming, and innovative cutting-edge nanotechnology, the surface of the aluminum alloy conductor produced No aluminum shavings, no burrs, no oil stains, no bumps, no scratches, no scratches, which can most effectively ensure that the cable insulation is free from any damage and damage, ensuring that the service life of the product is much longer than that of similar products.

(3) Conductor cable annealing: Usually after the conductor is twisted, the internal stress in the stranded conductor will be exerted on the insulation, causing the insulation to be stressed for a long time, accelerating the aging of the insulation and affecting the service life of the insulation. This directly affects the service life of the cable, which is why the service life of copper cables is not long. Aluminum alloy production plants in the United States all use conductor cable annealing technology to solve internal stress problems. Cable annealing technology can further improve the electrical and mechanical properties of the product, while eliminating the internal stress generated during the conductor stranding process, effectively ensuring the service life of the insulation. Therefore, it is necessary to check whether there is cable annealing technology and conductor cable annealing furnace equipment.

(3) Armor: See if there are leading aluminum alloy interlocking armor equipment

Many domestic manufacturers of aluminum alloy armor have poor equipment and low technical level. If the standard is not met, the alloy strip will be wider and the armor crest distance will be larger, causing the cable to be stiff, inflexible, easy to remove the armor, with poor compression resistance and poor performance. Currently, the most leading aluminum alloy interlocking armor equipment is Canada's KALMARK aluminum alloy interlocking armor production line. The interlocking armor produced by this equipment has good tightness, and the armors are interlocked and are not easy to break. Disengage. Because the distance between armored wave peaks is small, armor with the same distance has more stress points than other armored products and can withstand greater pressure without causing damage to the cable core. Because there are many wave crests, the bending radius is smaller, and the bending resistance is very good. This kind of aluminum alloy armor can actually meet the requirements of American standards for aluminum alloy armor.

Investigation Standard 2: Manufacturing Equipment

Firstly investigate whether the company has leading aluminum alloy cable production, manufacturing equipment and technical equipment.

(1) Aluminum alloy conductor rod continuous casting and rolling production line

The key to aluminum alloy cables is the production of aluminum alloy conductors. Therefore, when choosing a manufacturer, you must first look at Look, is there a leading continuous casting and rolling production line for aluminum alloy conductor rods? Currently, the most advanced aluminum alloy conductor rod production equipment in the country is Italian technology and can continuously cast large sections (3807mm2. Other production lines imported from Italy have the largest casting capacity. In a continuous casting and rolling production line with a cross-section that can only reach 2400mm2), the 3807mm2 aluminum alloy billet has undergone many vicissitudes, continuous rough rolling with a large compression ratio, and multi-pass continuous fine rolling to obtain a rod with moderate strength, high volume density, and conductive properties. The best aluminum alloy rod with the best technical indicators. The alloy wire drawn from this aluminum alloy rod uses the conductive core of the aluminum alloy cable conductor, which is the best product for cable superposition combination. If a factory does not have a leading continuous casting and rolling production line for aluminum alloy conductor rods, and the quality of aluminum alloy conductors cannot be controlled from the source of production, the quality of aluminum alloy cables cannot be guaranteed!

(2 )Conductor stranding production line

At present, the stranded conductors produced by the conductor stranding production lines of ordinary domestic manufacturers often produce aluminum chips and burrs, which harm the insulation, seriously affect the insulation effect, cause safety hazards and shorten the insulation Life span. At present, the most leading conductor stranding production line in China is a nano-scale stranding machine production line controlled by a split motor and PLC program. The surface of the aluminum alloy conductor produced using nanotechnology has no aluminum chips, no burrs, no oil stains, no bumps, No scratches or scratches, it can most effectively ensure that the cable insulation is free from any damage and damage, ensuring that the service life of the product is much longer than similar products.

(3) Aluminum alloy interlocking armor production line

Currently the world’s leading aluminum alloy interlocking armor production line is Canada’s KALMARK aluminum alloy interlocking Armoring machine production line, which is an aluminum alloy tape interlocking armored cable developed in accordance with American technical standards. Its special interlocking structure between layers can ensure that the cable can withstand strong external force damage, even if the cable suffers greater damage The armor layer can also protect the electrical function of the insulation layer from external pressure and impact. The structure of the aluminum alloy non-magnetic armor layer also effectively improves the flame retardant level of the cable, greatly reducing the hazard of fire or fire to the cable. The non-magnetic aluminum alloy armor also greatly reduces the eddy current loss of the cable.

Compared with steel tape armor, the aluminum alloy tape armor structure is lighter in weight, has no eddy current loss, is easy to lay, easy to bend, and does not require bridge installation. It can reduce the installation and laying cost by 20-30% and improve the installation efficiency.

Investigation Standard 3: Inspection Report

Primarily investigate whether the company's products have passed various tests related to product characteristics, fire resistance, flame retardancy, smoke toxicity, light transmittance, etc., by national authoritative organizations. and inspection certification.

(1) Three necessary technical reports: namely, "Aluminum Alloy Conductor Material Inspection Report", "Aluminum Alloy Conductor Compression Creep Performance Experiment Report" and "Transition Terminal 1000 Thermal Cycle Experiment Report" 》. The first is a report on whether the aluminum alloy conductor material meets the chemical composition requirements of the AA8000 brand. The second is a report on whether the aluminum alloy is directly different from pure aluminum. The third is a reliability report on the connecting terminals. These three technical reports It is necessary for qualified aluminum alloy cables.

(2) Inspection reports of aluminum alloy cable products issued by national inspection organizations such as China National Wire and Cable Inspection Center and State Grid Wuhan High Voltage Research Institute.

(3) Inspection reports on product fire resistance, flame retardancy, smoke toxicity, light transmittance, etc. issued by the National Fireproof Building Materials Quality Supervision and Inspection Center.

(4) When choosing halogen-free and low-smoke products, special attention should be paid to the smoke toxicity and light transmittance inspection reports issued by the National Fireproof Building Materials Quality Supervision and Inspection Center; currently, many domestic manufacturers claim that the aluminum produced Alloy cables are halogen-free and low-smoke, but the materials used in the actual products do not meet the requirements of halogen-free and low-smoke. This can be seen from the inspection report. The national regulations (GB/T20285-2006 Information on Tobacco Toxicity Risk Classification) related to the safety level of tobacco poison inspection; tobacco poison safety: AQ1gt; AQ2gt; ZA1gt; ZA2gt; ZA3gt; WX; the transmittance should be greater than 60, among which (AQ: is the security level, ZA is the quasi-security level, and WX is the risk level). Aluminum alloy product inspection results show that as long as the smoke toxicity index reaches the AQ level and the light transmittance is greater than 60, it is truly a halogen-free low-smoke product and is truly safe and reliable. Even if the cable is burned, it will not release toxic gases. , installation and use are safe.

(5) As for other so-called evaluation reports, career certificates, etc., they are actually made up by some companies. We all know that these things are issued by consulting and intermediary agencies run by professional departments. As long as you pay a fee, they are not difficult to obtain. These statements, certifications, etc. cannot explain or prove anything about product quality and are not sufficient as a reference.

Investigation Standard 4: Independent intellectual property rights and technical patents

Aluminum alloy cables are new conductor material products in China. The currently used standards do not have special regulations for aluminum alloy conductor materials. In order to prevent the unknown source of material and technology from causing the product performance and quality of aluminum alloy cables to not be guaranteed, the selected manufacturer must have an independent intellectual property patent certificate for the conductor material and manufacturing technology. Whether it has the core aluminum alloy conductor smelting formula and preparation patented technology and independent intellectual property rights is a basic condition that reflects a company's strong technical strength. As we all know, without the core technology of aluminum alloy conductors, no matter how loud the advertisement is, it is difficult to guarantee that it is an authentic aluminum alloy cable. The core technology aluminum alloy formula with patented invention is the first prerequisite for melting, casting billets and rolling rods in the first process of aluminum alloy conductor production. There is no real patented formula for aluminum alloy invention, and then there are leading continuous casting and rolling technology and equipment. It’s a drop in the bucket. The patented formula of aluminum alloy materials is a prerequisite for implementing high-level aluminum alloy cable processing, manufacturing and technical skills. It is a guarantee for the high quality of aluminum alloy cables and is a company's real technical advantage.

Investigation Standard 5: Quality Control

Cables are the arteries of power transmission and are related to the safe and smooth operation of power transmission in a company or even a region. The quality of aluminum alloy cables is crucial. There can be no carelessness. There is a big difference in production technology between the production of aluminum alloy cable products and the production of copper cables. The production of aluminum alloy cables requires a lot of professional inspection equipment and a complete quality management system.

Each batch of aluminum alloy cables needs to be carefully inspected and inspected in all aspects of production before leaving the factory. Investigating a manufacturer's attitude toward quality control can be seen from the personnel, funds, and organization invested. A professional aluminum alloy cable manufacturer should have a dedicated quality management unit, chemical analysis laboratory, mechanical performance laboratory, and physical performance laboratory. Laboratories, spectral analysis laboratories, electrical performance laboratories, etc., excellent company quality control is from tempering alloy aluminum liquid to continuous casting and rolling; from aluminum alloy rod wire drawing, compaction stranding to conductor heat treatment; from conductor insulation extrusion , cross-linking to insulated cores into cables; and finally every process from armoring, sheathing, routine testing, packaging and leaving the factory has complete and strict tracking and inspection, that is, control from the source to ensure the production of finished cables Of the highest quality. Carry out full-process quality control on the products produced, with time points accurate to every minute and every second, and mark them accordingly in the aluminum alloy cable structure to ensure the traceability of the quality control of every inch of aluminum alloy cable. One of the most important inspection equipment among many inspection equipment is aluminum alloy conductor material inspection equipment. Currently, the most advanced aluminum alloy conductor material inspection equipment in the world is Germany's full-spectrum direct-reading plasma emission spectrometer, which has the fastest inspection speed and accuracy. Highest. The spectrometer is mainly used to check the chemical composition of aluminum alloy materials and the crystallization state of the alloy. Without advanced inspection equipment, the quality of aluminum alloy conductors cannot be guaranteed!

Inspection Standard 6: Technical Standards

The national occupational standards for aluminum alloy cables have been submitted to the national competent department for approval. If It participates in the formulation of national standards and is a company specializing in the production of aluminum alloy cables. It must be a leading company with strength and influence in the industry. The United States is the birthplace of aluminum alloy cables. The United States’ aluminum alloy cable manufacturing technology and The installation experience is more than 40 years ahead of the domestic ones. Therefore, objectively speaking, American companies, especially the aluminum alloy cable manufacturers that were the first to bring aluminum alloy cable technology from the United States and use American standard manufacturing, are safer and more reliable. ensure.

Investigation Standard 7: Customer Cases

The application scope of aluminum alloy cables covers residential, commercial, industrial construction and other fields. Customer feedback is of great reference value. Here are some key points to understand about customers Using the operating status and after-sales maintenance status of aluminum alloy cables, if the customer's cable has problems every three days and requires the manufacturer to perform after-sales maintenance, it means that the quality of the cable needs to be paid attention to. A quick way to identify aluminum alloy cable manufacturers is to investigate the power planning unit. If a power engineering consulting and planning unit uses aluminum alloy cables for power transmission in its own building projects, then the supplier and product must have passed With sufficient and rigorous scientific evidence, you can choose with confidence.

Inspection Standard 8: Value-Added Services

Most domestic companies use the same ideas as copper cables to make aluminum alloy cables. Aluminum alloy cables are just one type of their product series. The idea of ??operating aluminum alloy cables is also to extend the idea of ??using copper cables and simply sell cables. Nowadays, selling aluminum alloy cables with the idea of ??simply selling cables no longer meets the needs of the times and social development. The production of aluminum alloy cables has a high technical threshold. A powerful aluminum alloy cable manufacturer not only needs to be able We provide the highest quality aluminum alloy cable products, and may also provide a complete set of cable transmission solutions, cable connection terminal solutions, and assist customers in making "Project Technology Solutions", "Product Life Cycle Cost Analysis Report" and other technical, Business planning, assisting customers in providing additional value-added services such as cable selection, installation guidance, personnel training, operation monitoring, etc., is a company without professional strength, attention to the aluminum alloy cable industry, and the attitude of being prepared to serve aluminum alloy cable users for a long time. It's very difficult to do.

Investigation Standard 9: On-site Investigation

Because domestic cable products are subject to inspection guidelines, the samples that are generally shown to customers in the industry are all made by entrusted gift companies. Yes, the report issued by the inspection organization is only responsible for the samples submitted for inspection. If there is a problem with the actually supplied product, the interests of the users will be harmed.

Some unscrupulous manufacturers take advantage of the policy loopholes, change the labels of other manufacturers' samples and take them to relevant inspection agencies for inspection, and use the products of standard factories as their own products to make samples for customers, defrauding inspection agencies and users. , also said that he had an inspection report and the samples were very beautiful, but the actual products supplied were far from the samples, and the quality of the products could not even be guaranteed. Therefore, it is best to conduct an on-site investigation of the manufacturer to investigate the manufacturer's actual strength and product quality to ensure that the products purchased are consistent with the samples. If a manufacturer's aluminum alloy cable products can guarantee that the product quality for random inspection at any time is of the same quality and quality as the samples submitted for inspection, then it is guaranteed.

Investigation Standard 10: Brand Culture

From a company's culture, operating philosophy, and brand accumulation, we can also feel a company's attitude toward the aluminum alloy cable industry. It is empty talk about " The public relations slogan "Green and Environmentally Friendly" still focuses on making products in a down-to-earth manner and providing customers with high-quality products and services. It represents the different operating personalities of different companies and their attitudes towards the aluminum alloy cable industry and users. The former is false and empty-handed, while the latter is low-key and pragmatic. It means truly thinking for customers from their perspective, giving priority to their interests, and treating customers as individuals. Some unscrupulous manufacturers defraud customers for commercial interests and endanger the interests of customers by stealing goods and turning them around. For example, they use aluminum cables to pretend to be aluminum alloy cables, use fake aluminum alloy cables to hit the market at low prices, and there are also cases where aluminum alloy cables and copper When changing cable specifications, they pretend to be professional prestige and make unscientific statements and practices. These actions not only endanger the interests of customers, but more fatally leave safety hazards for users and have a negative impact on the healthy development of the aluminum alloy cable industry. These bad behaviors require in-depth exposure and criticism.

If the first 5 of the above 10 standards are met, it can be judged to be a qualified aluminum alloy cable manufacturer. If all 10 standards are met, it is an excellent aluminum alloy cable manufacturer. Through the above 10 criteria, you can make an accurate judgment on how to choose an excellent aluminum alloy cable manufacturer. The vast majority of manufacturers that do not have aluminum alloy cable production technology and equipment, have poor capabilities, and are unprofessional can basically be excluded. The quality of the companies and products selected in this way is probably relatively safe and reliable!

Aluminum alloy cables use aluminum alloy as the conductor of the cable, which greatly increases the conductive performance of the cable, and the aluminum alloy The quality is good and not easy to be corroded, so the cable has a longer service life. Precisely because of the many benefits of aluminum alloy cables, this type of cable is widely used in some large power plants and power bureaus, and is also widely used in some large industrial plants. The production and use of aluminum alloy cables has seriously impacted the production volume of traditional cables, and it can also be said to have completely replaced traditional cables.

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