500kV Htv Polymer Long Rod Insulator with Corona Ring

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  Guaranteed Date of Long Rod Insulator Polymer 500kV

   

   

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  Reference Drawing

   

   

   

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  Description and Application

   

   

   

      As a certified ISO9001:2008 company, we, Wuhan Line Power Transmission Equipment Co., Ltd. who are official manufacturer of AC composite long-rod insulators of rated voltages from 10kV to 1000kV and rated mechanical load from 70kN to 550kN; DC composite long-rod insulators of rated voltages from ±400kV to ±800kV and rated mechanical load from 160kN to 550kN; composite pin insulators, composite cross-arm insulators, composite substation post insulators, composite line post insulator, composite insulator for electrified railway…All the products comply with ANSI standard, IEC and relevant standards.

      Composite suspension and tension insulators are used for overhead line transmission for fastening and insulation of the high voltage wire. Composite insulators are the replacement for porcelain and glass insulators. Their performance is good at pollution area, and it prevents line transmission flashover effectively.

 

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  Catalog number system

   

   

   

Example: Composite suspension and tension insulator, rated voltage 110kV, SML 120kN, BS, Model No.: FXBW-110/120

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  Technical and economic advantages of UHV DC transmission

   

   

   

Compared with ultra-high voltage DC at the ±600 kV level and below, the main technical and economic advantages of UHV DC transmission can be summarized in the following six aspects:

1. Large conveying capacity. Using 4000 ampere thyristor valves, the ±800 kV DC UHV transmission capacity can reach 6.4 million kilowatts, which is 2.1 times that of the ±500 kV, 3 million kilowatt high-voltage DC method, and is the ±600 kV, 3.8 million kilowatt high-voltage DC method. 1.7 times of that, which can give full play to the advantages of large-scale power transmission.

2. The power transmission distance is long. The use of ±800 kV DC transmission technology makes ultra-long-distance power transmission possible, and the economic transmission distance can reach 2,500 kilometers or even further, providing transmission guarantee for the development of large hydropower bases in southwest China.

3. Low line loss. When the total conductor cross-section and transmission capacity are the same, the resistance loss of a ±800 kV DC line is 39% of a ±500 kV DC line and 60% of a ±600 kV DC line. This improves transmission efficiency and saves money. Running costs.

4. Project investment province. According to calculations by the relevant design department, for ultra-long distance and ultra-large capacity transmission needs, the comprehensive cost per unit transmission capacity of the ±800 kV DC transmission solution is approximately 72% of that of the ±500 kV DC transmission solution, which saves significant project investment benefits.

5. The corridor utilization rate is high. The line corridor of the ±800 kV, 6.4 million kilowatt DC power transmission plan is 76 meters, and the transmission capacity per unit corridor width is 84,000 kilowatts/meter. It is a ±500 kV, 3 million kilowatt plan and a ±620 kV, 3.8 million kilowatt plan. It is about 1.3 times that of power transmission corridors, improving the utilization efficiency of transmission corridors and saving valuable land resources; due to the large transmission capacity of single-circuit lines, it significantly saves limited resources at valleys and river crossing points.

6. Flexible operation mode. The State Grid Corporation of China's UHV DC transmission plans to adopt a 400+400 kV double-twelve pulsation converter series connection scheme, which has a flexible operation mode and greatly improves system reliability. If any converter valve module fails, the system can still guarantee the delivery of 75% of the rated power.

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  Inspection before installation

   

   

   

Before dispatched, the goods shall be performed routine test and sample test according to related standards. Each sheds and housing should be checked thoroughly. Superficial defects of an area not greater than 25mm² (the total defective area not to exceed 0.2% of the total insulator surface) or of depth greater than 1mm.

If sheds and housing tear down or wear down, and the rod exposed to the air, please do not use the products.

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  Packing

   

   

   

  

  
  

  
  

   

   

All composite insulators are packed in weatherproof containers in order to protect the products during land, air, and sea transportation. Several different grades of packaging can be offered depending on the mode of transport and the expected storage conditions. The packaging options that we offer are: 

1)Standard grade/prefabricated packing. 

2)Economical grade/cardboard carton. 

3)Best grade/closed wooden crate. 

Since the user best knows their crate requirements, they should select the option that is most suited to their needs and include that information in the purchasing specification. Special packaging arrangements can be accommodated upon request.

Each container is marked with the number of insulators it contains, the catalog number, the manufacturer's name, and any other customer requests.

Each packing (wooden cases or crates) attached specification and certification of products.

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