As the mineral insulated fireproof cable for the power transmission of the building engineering fire system, its safety and reliability requirements are very high. It is the “lifeline” of rescue in case of fire, but now the cable industry market is mixed, with fierce competition between peers and overcapacity, which gives unscrupulous businessmen the understanding of the crooked brain. How do distinguish the authenticity of fire-resistant cable?
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Control Shielded Cable – Metal Shield And Shield Grounding
Metal shielded control cables are an important measure to attenuate and prevent electrical interference. Including the total shielding of the core, sub-shield, and double-layer type total shielding. The choice of metal shielding type of control cable should be based on the strength of the possible impact of electrical interference, taking into account the comprehensive measures to suppress interference to meet the requirements of reducing interference and overvoltage. The higher the requirements for the anti-interference effect, the greater the corresponding investment. Should be used steel belt armor, steel wire braid total shielding, the price of the cable increased by about 10% ~ 20%.
Selection Of Cable Lines And Cable Cross-Section
Ⅰ. Cable lines in the mine underground due to space constraints and safety needs, in addition to the rack line motor car, are used cable lines
Power cables can be divided into rubber-insulated cables, plastic-insulated cables, and oil-impregnated paper-insulated cables according to the insulation material. At present, oil-impregnated paper-insulated cables are rarely used, so do not speak.
The Droplet Movement And Ice-Covering Characteristics Of The Compound Insulator DC Electric Field
Compound insulator icing has always been a severe problem in the safe operation of my country’s power grid transmission line. It can not only cause the mechanical overload and collapse of the transmission lines and the tower but also cause the ice and flashing collar of the insulator string of the transmission line. In response to the impact of covering the power of power grid transmission lines, domestic and foreign scholars have done a lot of research.
What are The Considerations of Wire and Cable Storage and Transportation?
Storage and transportation of wire and cable products are two very important aspects. If the storage and transportation methods are not appropriate, the quality of wire and cable products can cause damage and affect the safety of use. So, in the storage and transportation of cable products, what matters need our attention?
Carbon Fiber Cable Construction Typical Defects And Operational Considerations
The full name of the carbon fiber wire is carbon fiber composite core aluminum stranded wire (ACCC), the wire from the beginning of this century has only been used for a relatively short period of more than ten years, there is a certain amount of experience in the application. Carbon fiber wire has high strength, lightweight, high modulus of elasticity, small coefficient of linear expansion, small arc sag, small line loss, large capacity (allowing high temperature), corrosion resistance, long service life, and other characteristics. Especially suitable for coastal, mining areas corrosion intensity, high fouling strength, the wire is easy to dance the use of the environment.
7 Common Faults In 10KV Overhead Cable Transmission Lines, As Well As The Causes Of Faults And Preventive Measures
10KV overhead cable transmission line common faults are 7 kinds
1 Single-phase grounding fault
Single-phase grounding is the most common fault in the power distribution system, mostly occurring in wet and rainy weather. Single-phase grounding not only affects the normal power supply of users, but also Hunan Sunshine Electronics School maintenance experts believe that: it may produce overvoltage, burn equipment, and even cause an inter-phase short circuit and expand the accident.
Design, Production, and Installation of Cable Termination and Joints for 10kv Cable Projects
1 Scope of application
It is suitable for the installation of 10kV XLPE cable cold shrink termination and joints in distribution network projects.
A Brief Summary Of “Three Spans” Of Transmission And Distribution Lines
With the continuous upgrading and construction of power grids and transportation infrastructure, transmission lines “three across” related issues are becoming more frequent. Such as improper handling, which will likely lead to significant public safety and grid security incidents. So for the transmission lines “three across” section, construction standards and other aspects must be strictly controlled. This paper provides a summary of this issue.
The Production Process and Selection of Cross-Linked Insulated Cables
Although there are many varieties of cross-linked insulation, they are mainly divided into two categories: physical and chemical cross-linking. The quality of the insulation is identical, so in the national standard GBl2706-91, there is no distinction between the cross-linking methods used.
Cross-linked insulation has been dominant in power cables, replacing oil-paper insulation, and gradually replacing PVC plastic insulation. Although there are many varieties of cross-linked insulation, it is mainly divided into two categories: physical and chemical cross-linking, and its insulation quality is completely consistent. Therefore, in the national standard GBl2706-91, no distinction is made as to which cross-linking method is used.