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Control cable installation measures
Control cable installation measures
In order to ensure the control cable in the event of insulation breakdown, mechanical damage or fire, reduce the scope of the protection: dual protection of the current, voltage and DC power supply and trip control loop and other two systems that need to enhance reliability, should be independent Control Cable.After the control cable in operation, betwee...
10 months ago
Talking about the knowledge of power cable structure
Talking about the knowledge of power cable structure
The power cable generally consists of a core, an insulating layer and a protective layer. The core is used for conducting electricity; the insulating layer is used to insulate the core conductor from the protective layer to prevent leakage; the protective layer is used to prevent damage to the cable insulation, moisture, and prevent outflow of liquid insu...
10 months ago
Control cable and its metal shield
Control cable and its metal shield
The control cable should be protected from damage due to insulation damage, mechanical damage, fire or electrical interference. Dual-protected currents, voltages, and systems that require enhanced reliability, such as DC power supplies and trip control loops, should use separate control cables. In the following cases, the same control cable should...
10 months ago
Control cable head manufacturing and secondary wiring method
Control cable head manufacturing and secondary wiring method
With the widespread use of computer technology, the number of control cables is increasing. For example, two sets of units with more than 300 MW have nearly 1,000 km of control cables, more than 20,000, and 200,000-300,000 cores. If the control cable head is not beautifully produced, the secondary wiring is confusing and the errors are many, which will seri...
10 months ago
Suitable storage methods of wire and cable
Suitable storage methods of wire and cable
As an important part of infrastructure construction, wire and cable account for a large proportion of exports. For example: N2XSY, NA2XSY, NYY,meduim voltage aluminum insulation power cable and aluminum cencentric cable.hen storing the cable, it is strictly forbidden to contact with acid, alkali and mineral oil, and should be stored separately from t...
10 months ago
Characteristics and installation of fire-resistant and flame-retardant cables
Characteristics and installation of fire-resistant and flame-retardant cables
1. Fire-resistant XLPE insulated, PVC sheath power cableIt can be laid indoors, in tunnels and in pipelines, and can withstand certain laying traction, but the cable can not bear external force, and single-core cable is not allowed to be laid in magnetic material pipeline. It is necessary to bear the external force of the machine and add the steel tape armor...
10 months ago
Renewable energy can reach 48% of the world's electricity in the next few years
Renewable energy can reach 48% of the world's electricity in the next few years
According to the 2019 New Energy Outlook report released by the research institute, the energy share of wind energy, solar energy and battery energy storage. The report not only found that wind energy, solar and battery storage will help drive renewable energy to account for 48% of the global energy grid, but also shows that these technologies can be used to...
10 months ago
Advantages, Disadvantages and Scope of Application of Power Cable Tunneling
Advantages, Disadvantages and Scope of Application of Power Cable Tunneling
The laying method has the advantages of large capacity, and generally adopts a concrete structure. The cable is laid in the air, and the cable has a large current carrying capacity, and can be entered into a small or small machine, a book cable structure, and the outer cable protection is excellent.For fully enclosed cable structures, tunnels generally hav...
10 months ago
Advantages and disadvantages of high voltage insulated overhead lines of 10kV and below
Advantages and disadvantages of high voltage insulated overhead lines of 10kV and below
The use of insulated wires instead of bare wires for high-voltage insulated overhead lines of 10kV and below is a new technology in the construction and reconstruction of urban distribution networks. It has a series of advantages of buried cables, and can overcome many shortcomings of overhead bare wires, can solve some of the problems encountered in the o...
10 months ago
Advantages, disadvantages and scope of direct laying of power cable lines
Advantages, disadvantages and scope of direct laying of power cable lines
According to the definition in DL/T 521-2-2005 "Technical Regulations for Urban Power Cable Line Design", the direct burial method is to put the cable into the trench for excavation, and lay a certain thickness of sand or fine soil along the cable. The prefabricated reinforced concrete protection board is placed on the back cover, and finally the soil is ba...
10 months ago
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