#35kv

[etech5svietnam]

Bút thử điện tiếp xúc 6-35kV, Model: A-6-35

Bút thử điện tiếp xúc 6-35kV, Model: A-6-35 được thiết kế để kiểm tra nhanh chóng và chính xác tình trạng có điện của các hệ thống điện từ 6kV đến 35kV. https://etech5s.com/but-thu-dien-tiep-xuc-6-35kv-model-a-6-35 #

Etech #thietbietech #Etech5s #thietbidoetech #congtyetech #EtechVietNam #butthudientiepxuca635 #a635

[btbelectric]

tu bu trung the

Tụ bù trung thế đóng vai trò quan trọng trong hệ thống điện trung thế, với chức năng tích điện và phóng điện để duy trì ổn định điện áp đường dây cũng như bù công suất phản kháng. Thiết bị này thường có các mức điện áp giao động từ 3kV đến 35kV và được phân loại theo loại 1 pha 2 sứ và 3 pha 3 sứ.

Nguồn: Tụ bù trung thế – Cấu tạo, ứng dụng và cách đấu nối

[gfuveelectronics]

GFUVE LZCK-55 Outdoor Split Core Current Transformer

LZCK-55 outdoor split core current transformer is a specially designed current measurement equipment for outdoor environments, with good waterproof performance and easy on-site installation. Here are some key characteristics and application scenarios of outdoor split core current transformers:

Waterproof performance: Outdoor split core current transformers usually have a waterproof rating of IP65 to IP67, suitable for use in rainy or humid outdoor environments.

Easy to install: This type of transformer adopts an split core structure, which can be directly clamped onto the connected inlet and outlet cables, making installation simple and fast.

Wide applicability: suitable for current measurement, power supply, signal sampling, and microcomputer protection in AC power systems of 0.66kV, 10kV, 35kV and below.

High magnetic permeability material: High quality imported silicon steel sheet with high magnetic permeability is selected as the magnetic material, which has the characteristics of separable iron core and low magnetic circuit loss.

Stability performance: The secondary winding is made of high-quality epoxy resin vacuum cast into a flame-retardant plastic shell, which is moisture resistant, stable in performance, and requires no maintenance.

Outdoor protection: It is equipped with a customized silicone protective cover, which has the functions of ultraviolet protection, aging resistance, moisture resistance, etc., to ensure that the transformer is not affected by the outdoor environment.

Easy to operate: It can be quickly and conveniently installed or removed without disconnecting the primary cable being tested, effectively conducting safe and convenient current testing.

High precision: Some models of outdoor open and close current transformers can achieve an accuracy level of 0.5S, suitable for metering purposes.

Multifunctional: Some models of outdoor open and close current transformers can not only have current measurement functions, but also perform puncture needle voltage collection and cable temperature collection.

Application field: Widely used in compact fully insulated ring network switchgear, column mounted transformer supporting engineering, and forming sampling units with remote distribution terminal equipment such as RTU and FTU.

GFUVE LZCK-55 outdoor split core current transformer has been widely used in outdoor power systems due to its high protection level and easy installation, providing important data support for power monitoring and protection.

[columbianewsupdates]

Elevate Energy Efficiency with 35KV Series Oil-Immersed Transformers

http://dlvr.it/T8hRTV

[thesunshinereporter]

Elevate Energy Efficiency with 35KV Series Oil-Immersed Transformers

http://dlvr.it/T8hQRP

[aerospaceandaviation]

Solar Transformer Market Share, Growth and Recent Trends by Forecast to 2030

The Insight Partners market research Solar Transformer Market Size and Share Report | 2030 is now available for purchase. This report offers an exclusive evaluation of a range of business environment factors impacting market participants. The market information included in this report is assimilated and reliant on a few strategies, for example, PESTLE, Porter's Five, SWOT examination, and market dynamics

Solar Transformer market is evaluated based on current scenarios and future projections are added keeping the projected period in consideration. This report integrates the valuation of Solar Transformer market size for esteem (million USD) and volume (K Units). Research analysts have used top-down, bottom-up, primary, and secondary research approaches to evaluate and approve the Solar Transformer market estimation.

Detailed scrutiny of market shares, optional sources, and basic essential sources has been done to integrate only valid facts. This research further reveals strategies to help companies grow in the Solar Transformer market.

Key objectives of this research are:

To contemporary market dynamics including drivers, challenges, threats, and opportunities in the Solar Transformer market.

To analyze the sum and market estimation of the worldwide Solar Transformer market

Based on key facets, market segments are added.

The competitive analysis covers key market players and their business strategies.

To examine the Solar Transformer Market for business probable and strategic outlook.

To review the Solar Transformer Market size, key regions and countries, end-users, and statistical details.

To offer strategic recommendations based on the latest market developments, and Solar Transformer market trends.

Perks of The Insight Partners’ Solar Transformer Market Research

Market Trends: Our report reveals developing Solar Transformer market trends that are poised to reshape the market preparing businesses with the foresight to retain their competitive edge. This Market research report presents market trends, supply chain analysis, leading participants, and business growth strategies. This research covers technological progress and key developments covering various aspects of the inclusive market. It is valuable market research for existing key players as well as new entrants in the Solar Transformer Market. Through inputs derived from experts, this research attempts to guide future investors about market details and potential returns on investment. 

Competitive Landscape: This research reveals key market players, their strategies, and possible areas for differentiation.

Analysts Viewpoint: We have industry-specific experts who add credibility to this report with their exclusive viewpoints based on market understanding and expertise. This report goes further into details of entire business processes and doesn’t restrict to only operational aspects. These insights cover venture economics and include tactics for capital investment, investor funding, and projections of ROIs.  Net income and profit loss financial stats are crucial metrics of this Solar Transformer market report. With these meticulous insights companies can reduce their risks and increase the success rate in the coming decade. 

Solar Transformer Market Report Coverage:

Report Attributes

Details

Segmental Coverage

Type

0-35KV

35-110KV

110-220KV

220-330KV

330-500KV

Above 500KV

Application

Distribution

Station

Sub-station

Pad mounted and Grounding

Geography

North America

Europe

Asia Pacific

and South and Central America

Regional and Country Coverage

North America (US, Canada, Mexico)

Europe (UK, Germany, France, Russia, Italy, Rest of Europe)

Asia Pacific (China, India, Japan, Australia, Rest of APAC)

South / South & Central America (Brazil, Argentina, Rest of South/South & Central America)

Middle East & Africa (South Africa, Saudi Arabia, UAE, Rest of MEA)

Market Leaders and Key Company Profiles

ABB

Ormazabal Velatia

OREX

Olsun Electrics

Núcleo ATS

Northern Transformer

Noratel

Ningbo Wanji Electronics Science and Technology

ABC Transformers

Marsons

LiYou Electrification

Guangdong NRE Technology

Other key companies 

What all adds up to the credibility of this research?

A comprehensive summary of the contemporary Solar Transformer market scenario

Precise estimations on market revenue forecasts and CAGR to rationalize resources

Regional coverage to uncover new markets for business

Rivalry analysis aims to help corporations at a modest edge

Facts-based crystal-clear insights for business success

The research can be customized as per business necessities

Access to PDF, and PPT formats of this research

About Us:

The Insight Partners is a one-stop industry research provider of actionable intelligence. We help our clients in getting solutions to their research requirements through our syndicated and consulting research services. We specialize in industries such as Semiconductor and Electronics, Aerospace and Defense, Automotive and Transportation, Biotechnology, Healthcare IT, Manufacturing and Construction, Medical Devices, Technology, Media and Telecommunications, Chemicals and Materials.

[shengyangelectric]

10kV-35kV Low-loss And Non-exciting Regulation Oil-immersed Power Transformer

This product complies with national standards, specifically GB1094-1996 for power transformers and GB/T6451-2008 for the technical parameters and requirements of three-phase oil-immersed power transformers. The S13 series transformer is the latest generation of low-loss transformers with copper windings. These products utilize high-quality materials and incorporate innovative techniques and materials in both the coil structure and insulation. This results in a substantial reduction in no-load losses and enhances the overall performance and structural reliability of the transformer, making it a good choice.

[dishinelectrical]

35kv Oil-Immersed Power Transformer

35KV oil-immersed power transformer can be used for 35KV indoor power distribution, infrastructure and industrial applications. This 35KV oil-immersed power transformer is widely used in substations and medium frequency power. It has smaller size and weight, lower leakage, better insulation resistance and higher efficiency. Transformers are versatile and widely used and are an important part of various industrial electronic equipment.

Phone:+86-15371780006

Tel:+86-0513-88779922

E-mail:James@dishin.net Sally@dishin.net

[busbarmachine001]

Safety Operation Regulations for CNC Top Payment Machine (Shanxi CNC Bare Ruts Cutting Line Equipment)

Compared to the shear machine, the technical content of the CNC bending machine mold is slightly higher. At present, there are G -shaped and F -shaped ones common in China. The position positioning of the block is that the capacity of the built -in anti -loading capacity is quite weak, so there is a balanced valve in the early CNC bending machine mold, but due to the hydraulic pressure, it is too complicated, which brings very serious in the later maintenance and stability. question.

CNC busbar machine Safety operation regulations The hard bus shape of the hard bus is rectangular, groove and tube shape. The rectangular bus is large, with high material utilization rate, and has a good anti -bending strength when bending, but the skin combines effect is large. In 4000A and below house distribution devices. The groove -shaped parent line has a small skin collection effect, good cooling conditions, and high mechanical strength. It is often used in a power distribution device with 35kV and below and continuous working current at 4000A -8000A. The curvature radius of the tube -shaped bus is large, the material conductivity, heat dissipation, bending strength and rigidity are good, the skin combines effect is small, it can be used for large current bus above 8000A, or can be used for 220kV and above house power distribution devices as long as the length Crossing the hard bus.

Auxiliary device, some necessary supporting components of the index control bus machine to ensure the operation of the CNC bus, such as cooling shaft flow fans, thimbles, lighting, monitoring, etc.

And in case of insufficient negative pressure or loss of negative pressure (like a three-phase rectification bridge, we can first consider the inverter output circuit as a inverter bridge, then the IGBT tube is formed by the three upper bridge arms and three below underneath Bridge arm, such as the IGBT tube of the upper bridge arm and the U -phase lower bridge arm.) When the upper (down) bridge arm is motivated and the bridge arm is opened, the corresponding lower (top) arm arm IGBT tube The loss of negative pressure forms the charging of a set-grid capacitor-radiation capacitor of the grid-shooting capacitor of the IGBT tube, which causes the misleading pipeline. The two tubes have a short circuit to the DC power supply.

The bending unit is a closed structure and adopts a horizontal processing method to ensure the structure strength of the bending unit. By replacing the bending mold, you can complete the processing of the workpiece, standing, pressing flowers and flat processing. Operating regulations

The above is the main axis torque and load of the parent line machine compiled by the transformer parent line. I hope everyone can understand it. If we are interested in the installation and fixing methods of large -scale homeline machining machines before, check our news dynamics at any time, and we will often update it.

The safety operation regulations of the CNC bus punching machines are raised slowly and smoothly at 0-50R/min, and proposed the following design solutions: ① According to the principle of mechanical transmission, use the motion of level 2 transmission to change the speed ratio. Reduce the start speed. ② In the previous design, a polar motor with a rated speed of 2800R/min was used. However, after a period of operation, the starting speed (by the spindle of the winding) was not adjusted by 0 slowly and uniformly. Instantly acceleration will be pulled off. Try the wire material. After that, the tetrassis motor YS6334 with a rated speed of 1400R/min was used. The parent wire uses the inverter to control the motor as the driver, which effectively ensures the stable control of the motor at a low -speed state at a low speed.

If the ambient temperature is lower than 0 ° C, it should be turned on for a few minutes before work. Take off the work button of each unit. Cut off the power switch on the operation disk. Cut off the line air switch and workshop power switch.

[voltagroup]

Máy biến áp là gì? Cấu tạo và nguyên lý hoạt động.

Máy biến áp là một thiết bị điện thực hiện việc truyền và đưa năng lượng hoặc các tín hiệu điện xoay chiều giữa các mạch điện thông qua các cảm ứng điện từ. Trên thực tế, máy biến áp là một thiết bị giúp làm biến đổi điện áp của dòng điện xoay chiều từ mức này sang mức khác; có thể tăng thế hoặc hạ thế đầu ra cho một hiệu điện thế tương ứng với nhu cầu sử dụng và không làm thay đổi tần số của nó.

Cấu tạo của máy biến áp: Máy biến áp gồm có 1, 2 hoặc nhiều các cuộn dây mà đầu vào và đầu ra của chúng có cùng một từ trường. Một máy biến áp cơ bản có cấu tạo gồm 2 hay nhiều cuộn dây cùng quấn vào một lõi sắt từ ferit và phần vỏ máy cách điện.

Cấu tạo máy biến áp: gồm lõi thép và dây cuốn. - Lõi thép: Lõi thép của máy biến áp có tác dụng để dẫn từ thông chính của máy, được chế tạo từ những loại vật liệu dẫn từ tốt như thép kỹ thuật điện. Để giảm dòng điện xoay trong lõi thép, người ta thường dùng lá thép kỹ thuật điện, ở hai mặt được sơn cách điện và ghép lại với nhau tạo thành lõi thép. - Dây cuốn: Dây cuốn của máy biến áp được chế tạo bằng các loại dây đồng hoặc nhôm, có tiết diện tròn hoặc hình chữ nhật được bọc cách điện ở bên ngoài. Bộ phận làm mát của máy biến áp thì tùy thuộc vào loại máy mà bộ phận này lại có sự khác nhau. Với những máy biến áp có công suất nhỏ thì được làm mát bằng không khí, còn đối với máy biến áp lớn thì được làm mát bằng dầu, và vỏ thùng có cánh tản nhiệt.

- Phân loại máy biến áp:

Tùy vào cấu tạo, chức năng và cách thức cách điện,… mà người ta chia máy biến áp thành nhiều loại khác nhau.

Phân loại theo cấu tạo: Máy biến áp một pha và máy biến áp 3 pha

Phân loại theo chức năng: Máy biến áp hạ thế và máy biến áp tăng thế

Phân loại theo cách thức cách điện: máy biến áp dầu, máy biến áp khô.

Phân loại theo nhiệm vụ: Máy biến áp điện lực, máy biến áp dân dụng, máy biến áp hàn, máy biến áp xung,…

Công dụng của máy biến áp:

Máy biến áp có tác dụng thay đổi hiệu điện thế xoay chiều, tăng thế, hạ thế và đóng vai trò vô cùng quan trọng trong việc truyền tải điện năng. Cụ thể, máy biến áp có thể giúp chúng ta chuyển đổi hiệu điện thế đúng với giá trị mong muốn.

Ví dụ: Máy biến áp giúp chuyển đổi hiệu điện thế từ đường dây trung thế 10kV, 22kV hay 35kV sang mức hạ thế 230V hay 400V khi sử dụng trong nhà.

Nguồn: www.voltagroup.net

[yfpower]

Electrical Product Power Mould

Electrical product moulds or power moulds are critical components in the production of high-quality electrical components and devices for power transmission and distribution systems. YF POWER is a leading brand that offers reliable electrical product moulds/power moulds designed to meet the specific requirements of electrical components and systems. These moulds are made of high-grade materials, including steel, aluminium, and copper alloy, and are manufactured with advanced production technologies such as CNC machining, EDM, and wire cutting. The use of these moulds ensures the optimal production of electrical components with precise dimensions, complex shapes, and high-repeatability rates.

YF POWER's electrical product moulds/power moulds are engineered to meet the highest quality standards, ensuring the longevity and reliability of the products manufactured using these moulds. These moulds are widely used in the power industry, including the production of insulators, bushings, and surge arresters, among others. YF POWER's electrical product moulds/power moulds provide efficient and cost-effective solutions for the production of high-quality electrical components, ensuring safe and reliable power transmission and distribution systems.

Types of Electrical Product Power Mould

Arrester Mould

10kV Arrester Mold (1-8)

36kV Arrestor Mold (1-6)

Insulator Mould

3kV Insulator Mold (R-1-8)

24kV Insulator Mold (R-1-6)

35kV Insulator Mold (R-1-6)

66kV Insulator Mold（1-2）

500 kV Insulator Mold

1000 kV Insulator Mold

Hollow Core Mould

110kv Hollow Core Mould

150kv Hollow Core Mould

Portable Variable Frequency Test System

Impulse Voltage Test System

AC Test Transformer System (Oil Insulated Type)

HV DC Generator Test System

AC Resonance Test System (Variable Inductance)

AC Test Transformer System (GAS Insulated Type)

Variable Frequency Resonance Test System(Gas Insulated Type)

Cable Accessory Mould

Cold Shrinkable Mould

Hot Shrinkage Mould

Cut-Out Insulator Mould

Benefits of Electric Product Mould/Power Mould

Precision and Consistency

Electric product molds are engineered with precise specifications, ensuring that each finished product meets consistent requirements. This reduces the possibility of defects and inconsistencies in the manufacturing process.

Longevity and Durability

Electric product molds are created using high-quality materials, ensuring a durable and long-lasting lifespan. As a result, this helps reduce costs for businesses in the long run through fewer replacements and more consistent outputs.

Customization

Power moulds can be customized to fit the specific needs of a product client, allowing for increased flexibility in manufacturing processes. Custom design renders improved performance, distinct shape, and innovation that helps products stand out from others in the market.

Cost-Effectiveness

Electric product moulds can be designed and produced at scale, reducing costs for businesses in the long run through options to use existing non-standard molds or to develop standard mold sizes, making them a cost-effective solution for businesses that produce high-volume parts. The cost-effectiveness in mould production allows manufacturers to make their products affordable while maintaining quality standards.

Working Principle of Electric Product Mould/Power Mould

Electric product moulds or power moulds are tools used to create a specific shape or design for an electrical product. The moulds are created with the customer's specifications in mind and are designed to accurately produce parts and components that meet precise requirements. The working principle of electric product moulds is straightforward. The mould is created with a cavity or a set of cavities that match the desired shape of the final product. Once the mould is in place, the liquid material is injected into the cavity, taking up the space occupied by the mould.

Once the material cools or solidifies, the mould is removed, leaving a finished part with the exact shape and design specified by the client. Using electric product moulds helps ensure that the quality and consistency of electrical products remain uniform in every production batch. Moreover, power moulds can now be designed and customized to provide automation, reduction in human errors, and a high level of precision in production processes.

[vietphattech]

[No 1] Cung cấp ống co nhiệt trung thế tại Bắc Ninh, Báo giá gen co nhiệt trung thế tại Bắc Ninh

Tags: Cung cấp ống co nhiệt trung thế tại Bắc Ninh, báo giá ống co nhiệt trung thế tại Bắc Ninh, gen co nhiệt trung thế tại Bắc Ninh, ống co nhiệt trung thế giá rẻ tại Bắc Ninh, gen co nhiệt trung thế 10KV tại Bắc Ninh, gen co nhiệt trung thế 24KV tại Bắc Ninh, gen co nhiệt trung thế 35KV tại Bắc Ninh, ống co nhiệt trung thế giá rẻ tại Bắc Ninh Liện hệ báo giá: Miền bắc: 085.555.5356 Miền nam:…

[pc1epcvn]

Tan Phu Dong 1 Wind Power Project started construction in 2022 - PC1 EPC

Investment level of Tan Phu Dong 1 wind power plant project - Tan Phu Dong 1 wind power plant has a total investment capital of up to VND 4,464.54 billion. In which, the investor’s capital accounts for 30%, equivalent to 1,339.36 billion VND; 70% of the remaining capital is bank loans, equivalent to 3,125.28 billion VND. The whole project is built on an area of 22 hectares that belongs to districts and towns in Tien Giang. The project includes the following items: 24 wind turbine towers with an area of about 200 m²/pillar Line 35KV Operational manager and substation 35/110KV with an area of about 3ha 110KV transmission line with a foundation area of about 4.5 ha 24 wind turbine towers with an area of about 200 m²/pillar Line 35KV Operational manager and substation 35/110KV with an area of - 8oakm7a567

https://pc1epc.vn/en/tan-phu-dong-1-wind-power-project-started-construction-in-2022

[aerospaceandaviation]

Solar Transformer Market Technologies, Growth Factors, and Regional Forecast to 2030

The Insight Partners is excited to announce the release of groundbreaking findings in its latest market research report, "Overview of Solar Transformer Market Share, Size, and Forecast | 2030". The panoramic research, conducted by our team of seasoned experts, provides valuable insights on the Solar Transformer market forecast, key trends, drivers, challenges, and opportunities within the Solar Transformer market.

The report unveils a detailed Solar Transformer market analysis of the current Solar Transformer market size and projects future growth trends based on historical data and market dynamics. At our research firm, we aim to help investors by providing both qualitative and quantitative data through this study. This global Solar Transformer market report, competitive landscape, risks and barriers to entry for market players, sales channels, distributors, and Porter's Five Forces Analysis.

Businesses must have a firm understanding of the market, before making significant investments. It makes financial sense to allocate a modest portion of your company's expenditure to reliable market research. With a team of well-versed experts, we deliver actionable insights and strategic intelligence to help businesses navigate the complexities of the market landscape. Our commitment to excellence and innovation sets us apart as a trusted partner for organizations seeking a competitive edge.

Why Opt for Our Solar Transformer Market Research Report?

Our researchers employ a multi-faceted approach to data collection, utilizing primary and secondary sources to ensure the breadth and depth of information.

Our researchers analyze consumer behavior, market trends, and brand positioning methods. Every piece of data undergoes a rigorous validation process to ensure accuracy and reliability.

We prioritize clarity and conciseness in our reporting, presenting findings in a format that is easily digestible for our clients.

We develop customized analytical models tailored to the specific nuances of the Solar Transformer market, allowing us to uncover hidden patterns and trends.

The report answers the following questions:

What are the primary factors driving the Solar Transformer market growth during the projected period?

What region is likely to witness the most substantial growth?

Which Solar Transformer market trend will take center stage in the coming years?

What are the key challenges hindering the Solar Transformer market expansion?

Emerging Trends: Our report uncovers emerging trends that are poised to reshape the Solar Transformer market equipping businesses with the foresight to stay ahead of the competition.

Competitive Landscape: The Insight Partners explores the competitive landscape, offering insights into key Solar Transformer market players, their strategies, and potential areas for differentiation. The key companies in the Solar Transformer market are ABB, Ormazabal Velatia, OREX, Olsun Electrics, Núcleo ATS, Northern Transformer, Noratel, Ningbo Wanji Electronics Science and Technology, ABC Transformers, Marsons, LiYou Electrification, Guangdong NRE Technology .

Consumer Insights: Understanding consumer behavior is pivotal. The report includes a comprehensive analysis of consumer trends, preferences, and purchasing patterns.

Market Segmentation- The report breaks down the Solar Transformer market into key segments, providing a detailed examination of each segment's market size, Solar Transformer market growth potential, and strategic considerations.On the Basis of Type this market is categorized further into-

0-35KV

35-110KV

110-220KV

220-330KV

330-500KV

Above 500KV

On the Basis of Application this market is categorized further into-

Distribution

Station

Sub-station

Pad mounted and Grounding

On the Basis of Geography this market is categorized further into-

North America

Europe

Asia Pacific

and South and Central America

Key regions Solar Transformer Market Research Report:

North America (U.S., Canada, Mexico)

Europe (U.K., France, Germany, Spain, Italy, Central & Eastern Europe, CIS)

Asia Pacific (China, Japan, South Korea, ASEAN, India, Rest of Asia Pacific)

Latin America (Brazil, Rest of Latin America)

The Middle East and Africa (Turkey, GCC, Rest of the Middle East and Africa)

Rest of the World

About Us:

The Insight Partners is a one-stop industry research provider of actionable intelligence. We help our clients in getting solutions to their research requirements through our syndicated and consulting research services. We specialize in industries such as Semiconductor and Electronics, Aerospace and Defense, Automotive and Transportation, Biotechnology, Healthcare IT, Manufacturing and Construction, Medical Devices, Technology, Media and Telecommunications, Chemicals and Materials.

[shengyangelectric]

SZ13 Series 35kV Low-loss And On-load Regulation Transformer

This product adheres to state standards GB1094 "Power Transformer" and CB/T6451 "Technical Parameters and Requirements for Three-Phase Oil-Immersed Power Transformers." The scope of this product includes on-load tap changers for 30: 4x2.5% kV and 35+3x2.5% kV on one side. The kV on-load tap changer can switch through manual, electric, or automatic voltage adjustment, ensuring stable output voltage. As a result, it finds wide application in settings with high demands for voltage quality, such as scientific research facilities, buildings, hotels, enterprises, and institutions. This product represents an upgraded version and offers improved operational and economic benefits.

[yoursupercable]

Shielding of medium voltage cables

AAC cable

The metal shielding layer is an indispensable structure in medium voltage (3.6/6kV∽26/35kV) XLPE insulated power cables. The insulated cores of all cables should have metal shielding, which can be on a single insulated core. A metal shield may be applied to several insulated cores. Scientifically designing the structure of the metal shield, accurately calculating the short-circuit current borne by the shielding layer, and formulating the shielding layer processing technology reasonably play a vital role in ensuring the quality of the cross-linked cable and the safety of the entire operating system. The metal shielding methods of medium-voltage XLPE insulated power cables are mainly shielded with copper tape and shielded with a cover and shielded with sparsely wound copper wire.

According to the standards for cables with a rated voltage of 6kV to 35kV, the average overlapping rate of the copper tape in the copper tape shielding method is not less than 15% (nominal value) of the copper tape width, and the minimum value is not less than 5%. The copper tape thickness of single-core cable is ≥0.12mm, the average thickness of multi-core cable is ≥0.10mm, and the minimum thickness of copper tape is not less than 90% of the nominal value. Copper wire shielding is composed of loosely wound annealed copper wires, and its surface should be tightly bound by reversely wrapped copper wires or copper tapes. The average gap between adjacent copper wires should not be greater than 4mm. The shielding on the cable structure is a measure to improve the electric field distribution. The role of metal shielding mainly has the following aspects:

When the cable is normally energized, the metal shielding layer passes the capacitive current, and the short-circuit current passes through the short-circuit fault.

The electromagnetic field caused when the cable is energized is shielded in the insulated core to reduce the electromagnetic interference to the outside world. The metal shielding layer also limits the influence of the external electromagnetic field on the inside.

The power station protection system requires the outer metal shield to have good lightning protection characteristics.

Homogenize the electric field to prevent axial discharge. Since the semiconducting layer has a certain resistance, when the metal shielding layer is not well grounded, the cable will be discharged along the surface due to uneven potential distribution in the axial direction of the cable.