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Why high-voltage wires do not have cladding insulation like ordinary wires
Why high-voltage wires do not have cladding insulation like ordinary wires
Because it is not necessary to provide a high voltage voltage insulation layer, it is also a waste of money.The transmission voltage of high-voltage transmission lines is mostly above 10,000 volts, and the voltage of some lines is as high as 100,000 volts and 500,000 volts. If the insulation layer is to be provided for such a line, the thickness of the insulat...
7 hours ago
Control cable usage and performance introduction
Control cable usage and performance introduction
The control cable should meet the requirements of GB/T9330-2008. 450/750V PVC insulated control cable, flame retardant PVC/XLPE insulated control cable and refractory PVC/XLPE insulated control cable.450/750V polyethylene insulated control cable meets the requirements of GB/T9330-2008.The 450/750V XLPE insulated control cable complies with...
8 hours ago
Flame retardant wire and cable types and performance and the advantages of using flame retardant wires.
Flame retardant wire and cable types and performance and the advantages of using flame retardant wires.
1. Ordinary flame retardant wire and cable Ordinary flame-retardant wire and cable insulation and sheathing materials are generally made of halogen-containing (or modified with halogen-containing flame retardants) polymer materials, the most commonly used is polyvinyl chloride (PVC) materials. Ordinary PVC resin has extremely high elect...
20 hours ago
What are the main features of the control cable and measures to prevent electrical interference?
What are the main features of the control cable and measures to prevent electrical interference?
The cable performance is actually clear, and it is really best to know when it is used. We also want to know the actual performance when we pay attention to the control cable, so that we can know whether it is the best when analyzing. Or some other advantages, you should still understand some other advantages when analyzing problems, so as to ensure better use.P...
1 day ago
What are the main reasons for wire and cable insulation breakdown?
What are the main reasons for wire and cable insulation breakdown?
Breakdown refers to the damage of the insulation layer of the cable due to external force damage (extrusion, lightning strike, etc.), the deterioration of the insulation material, etc., the original insulation performance is destroyed, the original insulation performance is lost, and the core wire to the core wire of the running cable occurs. Between t...
1 day ago
The broad prospects of overhead lines
The broad prospects of overhead lines
The advantage of the overhead line is that the simple structure, the convenient installation, the  smaller investment, the large transmission capacity, the heat dissipation condition is good, and the maintenance is convenient. Good mechanical and electrical properties of overhead line cables. At present, overhead lines account for a large pro...
1 day ago
Causes and Countermeasures for Faults in Power Cable Lines
Causes and Countermeasures for Faults in Power Cable Lines
Short-circuit fault: There are two-phase short-circuit and three-phase short-circuit, which are mostly caused by hidden dangers left in the manufacturing process.Grounding fault: A certain core or several cores of the cable break down to the ground. The insulation resistance is lower than 10kΩ and the low resistance is grounded. Above 10kΩ is calle...
5 days ago
What is the difference between armored cable and non-armored cable?
What is the difference between armored cable and non-armored cable?
What is an armored cable:ClassificationThe armor is divided into steel belt armor (22, 23), thin steel wire armor (32, 33), and thick steel wire armor (42, 43).Steel cable armored cable models are VV22, VVP22, ZRVV22, NH-VV2;Control cable steel cable armored cable, models are KVV22, KVVP2, KVVP22, ZR-KVV22,Steel wire armored power cable and cable, mod...
4 days ago
Main advantages and disadvantages of power cables
Main advantages and disadvantages of power cables
In power lines, the proportion of cables is gradually increasing. Power cables are cable products used to transmit and distribute high-power electrical energy in the backbone of power systems, including various voltage levels of 1-500KV and above, and various insulated power cables.Power cables are cables used to transmit and distribute electrical e...
5 days ago
Several problems should be paid attention to in the selection and use of control cables
Several problems should be paid attention to in the selection and use of control cables
In order to ensure the control cable in the event of insulation breakdown, mechanical damage or fire, reduce the scope of the spread, the national standard GB50217-91 "Power Engineering Cable Design Specification" stipulates: dual protection current, voltage and DC power supply and trip control loop, etc. Two systems that require enhanced reliabilit...
5 days ago