How Does Overhead Line Fittings From China Manufacturers Work?

Tips for overhead line fittings

Why is overhead line fittings important?

Overhead Line Fitting

If you want to learn more, please visit our website ZheXi.

Overhead lines basically refer to posts or columns that are used in supporting overhead public utilities. These utilities include overhead lines, overhead cables, streetlights, transformers, as well as fiber optic cables.

These overhead lines are required for insulating these utilities from touching the ground and also for ensuring that vehicles or people do not interrupt them or get affected by them.

Owing to the fact that these overhead lines ensure the safety of the people and also insulate various overhead utilities, they need to be made from materials that are durable and strong.

Overhead line fittings are also known to include fasteners, which enable them to support cables comprehensively. These fasteners, which are also known as crossover clamps, are made in different dimensions, to support different sized cables and are usually used at important junctions that occur between many cables, to help stabilize them.

let me explain each type of overhead line fitting one by one:

string hardware

Rax Industry string hardware is comprised of the following components:

Tension dead end clamp

Anchor shackle

Ball eye

Socket tongue

The tension dead end clamp is made of cast iron instead of aluminum alloy.

All of the components are hot dip galvanized steel of Min UTS 60KN for 33kv overhead line.

Suspension clamps were signed for use on Aluminium Conductor steel reinforced (ACSR) to hang the ACSR to the insulator fitting.

3 Bolt tension dead-end clamps for line 100mm2(ACSR and AAAC) conductor is for fastening of the M.V conductors to the tension insulators. The tension clamps are made of aluminum alloy of min ultimate tensile strength (U.T.S) 60KN. The U bolts, nuts, washers are hot dip galvanized steel. The cotter pins are stainless steel.

String hardware

When the single insulator connected into an insulator chain, Rax Industry string hardware is used to joint one or two insulator chains.

The complete set which used to joint one single insulator chain is as below:

1. Ball hook
2. Ball socket

The dimensions of ball socket and ball eye test according to IEC.

3. Tension clamp
4. U BOLT

The string hardware which used to connect the insulator chains on to the cross arm or assemble the earth wire on the pole or tower is as below:

1. Yoke plate
2. U Clevis

How to produce overhead line fittings

Rax Industry as the best electrical overhead line material manufacturer ensures that all the raw material is of the best quality and confirms the latest BS standards.

There are many processes to make each type of overhead line fitting. For the ball eye, ball hook and U clevis, the main process is drop forged. For the cross arm, pole band and yoke plate, the main process is cold forming and pressing.

For the tension clamp and suspension clamp, the main process is casting.

To make every step very well, Rax Industry successfully passed the loading test and dimension test, also the Galvanizing test.

Overhead Powerline Fittings Guide

An overhead power line is not complete unless it has a set of line fittings.

The overhead line fittings ensure the overhead line operates as usual without any hitches.

They are usually attached to different components of the overhead power line to perform their respective functions.

In other words, overhead line fittings for insulators are different from the overhead lines for the conductors.

For this reason, you need to buy the right overhead accessory for the specific component of the overhead lines.

What are Overhead Line Fittings?

Overhead line fittings are basically accessories that are used to attach one component of an overhead power line into another component or unit.

For instance, a fitting can connect the conductor to the tension strings.

Other fittings are attached to the insulator or even to the same conductor to perform a different role.

What are the Functions of Overhead Line Fittings?

Probably you are wondering about the specific roles that are played by overhead line fittings.

Or are they just used to add aesthetic value to the power lines?

To give you a better understanding, here are some of the critical functions that are performed by the power fittings:

-To connect the conductor and the insulator to the poles or tower

-To protect the conductor and the insulator from stress and other mechanical forces

-To streamline the transfer of electric loads in a  conductor

-To secure the cable and the conductor through the slip-hole

As you can see, the accessories mainly play a supporting role.

Theirs is to ensure that the main components of the overhead lines work smoothly as expected.

Properties Overhead Line Fittings

Before being supplied to the market, overhead line fittings must undergo a series of tests to ensure that they meet certain standards.

These standards are what define the properties of the accessories.

Of course, there are several reasons why this should be done.

First, the fittings will be exposed to vagaries of nature such as wind, rain, excess temperatures among others.

The tests are done to ensure that the fittings can withstand such conditions.

The second reason is to test the mechanics of the fittings.

Since the fittings will be connected to other components, there is a dire need to ensure that there is a seamless connection between all the components.

So, what are some of the properties that define the quality of overhead line fittings?

Material Properties of Overhead Line Fittings

There are certain requirements that define the ideal material of an overhead power line accessory.

One of them is hardness.

The material should be hard enough to survive any physical abrasions.

It should not bend or even break so easily when hit by an object.

Also, the materials should not corrode easily when scratched.

The physical property applies to all the overhead line fittings and their components regardless of their specific functions.

To achieve the highest standards,  most overhead line accessories are made of steel and galvanized aluminum.

This is because these two metals are known for their immense strength and resistivity.

In order to counter the effect of rusting, the materials are galvanized.

The material of the fitting should have some level of thickness so as to give some allowance in case of the corrosion.

2.Design Properties of the Overhead Line Fittings

When you see the term design, what is the first thing that will come into your mind?

To most of us, a design is usually associated with the shape and structural organization of an object.

It dictates how overhead line fittings relate to other essential components of an overhead power line.

There are certain design requirements that an accessory should meet.

First, the design should allow the accessory to move along the insulator or conductor freely.

There should be no frictional force or any other resistance forces that hinder the movement of the fitting.

The dimensions of an accessory should be precise and accurate.

This will allow the accessory to attach itself easily to the conductor without forcing you to make any adjustments.

In terms of the dimension, you should consider the diameter and even the length of the fitting.

The accuracy of the dimension can also prevent the accessory from becoming loose and falling off the conductor

You may also need to consider the weight of the accessory.

Do you know that an overweight fitting can cause fatigue damages to the conductor?

Another design factor that you need to take care of is the allowance angle at which the accessory can swing from the conductor.

For example, a counterweight stirrup of a suspension clamp has an allowance of 45°.

Anchor Rod Drawing

3.Mechanical Properties of the Overhead Line Fittings

Mechanical properties define how overhead fittings work.

They also dictate the correlation between the fittings and the conductor.

The first mechanical property that needs to be considered is the turning angle of the accessory.

The fitting should have a well-defined angle at which it can turn without breaking or showing any signs of deformation.

Another mechanical property that you should consider is the amount of force which the accessory will exert on the conductor.

The force should be reasonable. However, it should not be too much such that it can cause physical damage to the conductor.

Electrical Properties of Overhead Line Fittings

Since the overhead lines are for transmitting electricity, the fittings should have several electrical properties.

The first property is the ability to withstand the fault current.

This is the current that flows through the conductor when there is a fault.

It usually happens when the conductors short-circuit each other.

The second property is the accessory should not cause any hysteresis loss.

This is the current loss that is usually caused by magnetic effects.

Common Overhead Line Fittings

So, which are these overhead fittings that we keep talking about?

Here is a breakdown of the most important accessories for overhead lines that you need to buy.

1. Suspension clamp for overhead lines

Suspension Clamp

A suspension clamp is an overhead hardware that clamps a conductor or cable longitudinally to the pole.

The arms of the clamp extend outwards to whichever direction you would like the cable to.

Even though the clamp holds on tight to the cable, it still allows it to oscillate freely along with it but within a well-defined limit.

2. Tension Clamp

Tension Clamp

A tension clamp is an overhead fitting whose purpose is to terminate the conductor at different points.

It also provides electrical and mechanical connections to the insulator.

A tension clamp also serves as a protective fitting to the conductor.

3. Clevis Extension

As an overhead line accessory, a clevis extension is a U-shaped metal connector that other components of the overhead line fit into.

It has a head and a bolt that the conductor or even the insulator can pass through.

4. Anchor rods

Anchor Rod

Anchor rods are directly attached to the pole or towers of the overhead lines.

They are embedded in the foundation of these structures to offer support and stability.

Anchor rods have several components such as bolts, stiffeners, and plates.

5.Mid span joints

The midspan joint is an accessory used for connecting two conductors that have different lengths.

Usually, they are connected in between the pylon towers to form tension joints.

6. Armor Rods

Armor Rod

Armor rods mainly play a protective role in overhead lines.

They are designed to protect the conductor from abrasion, bending, and compression.

7. Pole Band

Pole Band

A Pole band is an accessory that holds other fittings into their perfect position.

It is a must-have accessory on any power line otherwise all your fittings will fall out of their position.

Since it plays a supporting role, a pole band needs to be strong and resistant to external elements.

8. Dead End Clamp

This is another important fitting on an overhead line.

The main function of the dead-end clamp as overhead line hardware is to complete the connection of the overhead lines to the pole

This type of clamp comprises different components such as a piercing connector and is made of high-quality material.

Commonly used materials for dead-end clamps are steel and aluminum.

Choosing the Best Overhead Lines Fittings

Once you know the exact overhead line accessories that you need, the next step is to purchase them.

But, with several models and brands in the market, how do you choose the best accessory?

Obviously, you want something that will give you true value for your money.

Here are the best tips for choosing overhead lines fittings:

1. Overhead line materials

What material has been used to make the accessory?

Whether it is a suspension clamp or any other fitting, you need to pay attention to the material that has been used.

Choose overhead line fittings that are made of high-quality or premium materials.

It is advisable to choose an accessory that is made of stainless steel or aluminum.

Given that the accessory will be exposed to all vagaries of nature, it should be made of a material that will deal with all the external forces

This is important especially when we consider that some fittings are designed to protect the conductor.

Is the electrical overhead line material hard or tough enough to survive the harshest conditions?

Can it rust if exposed to water under other unfavorable conditions?

Check the specifications of the material as stated by the overhead line fittings manufacturer.

For more information, please visit Overhead Line Fittings From China Manufacturers.

2. The design of the fitting

Take your time to carefully analyze the design of the accessory or fitting.

By design, we simply mean the physical appearance of the accessory.

In terms of the design, look at the measurements of the fitting.

Do they match the requirements of your powerline?

If it is a tension clamp, its dimension should perfectly match that of the conductor.

3. Cost  of overhead line fittings

The price of overhead fittings is one factor that you cannot ignore.

It is important to know how much you will spend on the fittings.

This will knowledge will help you to properly plan for your budget.

Before making the purchase, spare some time to compare the prices offered by different overhead line fittings manufacturers.

By the rule of nature, you will be expected to buy the cheapest overhead line fittings.

However, you should not always rush to buy cheap products.

Instead, analyze the quality of the product.

An accessory can be cheap just because it is made of low-quality material.

As they always say, cheap will be expensive.

4. Overhead Lines Manufacturer

Do not just buy overhead power lines from anyone.

You should be careful with the manufacturer that you choose.

An overhead line hardware supplier can leave you with either a good or nasty experience.

Some can sell you quality fittings while others will sell you faulty fittings.

On the same note, some manufacturers charge reasonable prices while others will overcharge you.

So what should you do to end up with the best overhead line fittings manufacturers?

Just use the following checklist:

-The Experience of the Manufacturer: How long has the manufacturer been in the industry?

It is always advisable to buy from experienced manufacturers.

This is because they know all the dynamics that revolve around this industry.

-The capacity of the manufacturer:  Does the manufacturer have the resources and technology to produce the best fittings?

One way of knowing this is by visiting their premises.

-Is the manufacturer licensed? Check if the manufacturer that you are dealing with is licensed to operate in China.

Licensed companies strive to meet strict regulations when selling to their customers.

Let them prove it to you by showing them their necessary documents.

-Referrals: People who have bought power lines fittings can refer you to the best manufacturers and suppliers.

-Online referrals: Online platforms such as social media can play a vital role in helping you to find reliable overhead line fittings suppliers in China.

Conclusion

There is no doubt that buying overhead line accessories can be a daunting task.

It requires you to take well-calculated steps.

But once you know the exact fittings that you should buy and find a reliable manufacturer, everything will fall into the right place.

Learn More:

• What is Overhead Power Line?
• What is Utility Pole?
• What is Transmission Line?

FAQ

What is overhead line fitting?

Overhead line fitting is a wide range of steel fittings that are used to construct the overhead line， it is used to hang, connect or protect conductors or insulators.

Overhead line fitting is also called overhead line hardware or overhead line accessories.

What are the types of overhead line fittings?

According to the function, overhead line fittings can be divided into:

• String hardware
• Suspension clamp
• Tension clamp
• Splicing fitting
• Protective fitting
• Dead end fitting

Overhead Power Line Fittings Complete Buying Guide

An overhead power line is an infrastructure that is used for the transmission and distribution of electricity. The distribution can be over either a short distance or a long distance depending on the scope of the project.

Overhead power lines are capable of transmitting different amounts of voltages. Although they are usually used for high voltage power transmission, you can also use them for the low voltage.

Most overhead power lines are characterized by cables that are suspended across poles and towers.

To ensure that everything on the pole is in its perfect position and functions well, you will need overhead power line fittings.

What are the functions of the overhead power line fitting and which one should you buy for your project?

We have the answers to these and many other questions that you have regarding the pole line fitting. All that you have to do is read on this guide.

In this guide, I am going to guide you on how to buy the best overhead power line fitting

Overhead Power Line Fitting Definition

What is an overhead power line fitting? Simply defined, power line fittings are accessories that are installed on the transmission lines for the purpose of creating connections and attachments between different components.

The fittings also protect some components of the power transmission line against physical and mechanical damage.

Each electrical power line fitting is designed to play a specific role in the power line. For example, the fittings for the conductors are connected to the cable to suspend or terminate the conductor. The same fittings can also protect the conductor against the loss of electric current.

The same applies to the power line fittings for the insulators. They are also connected to the insulating components of the transmission line.

It is important to identify the role that is played by each pole line fitting before you make any decision.

Types of Overhead Power Line Fittings

Here is different power line hardware each one is designed to perform ts specific role.

The fitting include:

Alley Arm: It is a sidearm brace that is designed to brace a crossarm that is uneven. The arm features a straight edge and the other side is slightly bent.

Ball clevis: Also named clevis eye, it is designed to connect the socket insulator by its ball.

Cross arm brace: The same function as alley arm brace – just different construction.

Electrical Cross Arm: It is composite equipment utilized in the pole line technology for holding electric equipment such as power lines.

Pole top bracket: This fitting is used for mounting line post insulators onto the desired positions.

Pole top pin: It supports the insulator on top of the pole with the help of bolts.

Socket clevis: Also known as sock tongue, it is designed to complete the connection between socket clamp and socket type insulator.

Stay Rod: This accessory provides a point of attachment for the guy wire. It ensures that the wire is supported to the ground firmly.

Suspension clamp: The clamp is used for suspending cable or conductor to the pole.

Yoke plate: This hardware is used for coupling the electrical clevis and the insulators or the socket tongue.

Guy Thimble: The guy thimble plays the role of holding the stay wire into position

Guy Clamp: The clamp has grooves through which cable and conductor pass.

Properties of Power line Fittings

When buying transmission line hardware fittings, it is vital to know each of their properties. This information will come in determining the performance of that fitting.

Here is a breakdown of the key properties of power line fittings that you should know:

Mechanical Properties

Mechanical properties define the general working mechanism of a power line fitting and how it interacts with other components of the pole line hardware.

Some of the mechanical properties that you should know include but not limited to;

-The angle of turn: Since most transmission line hardware is subjected to different mechanical forces, it is vital to know the maximum and minimum angles through which they can turn.

-Exertion force: This is all about the maximum pressure which the overhead transmission line conductor can withstand without breaking, snapping, or even getting damaged.

Material Properties

The material properties are used for defining how strong or weak is the transmission line accessory. This is in line with the fact that different they are made of different types of materials.

One of the key material properties is the hardness of the material. It will determine whether the power line fitting is strong or not.

The material for your power line fitting should be strong enough to resist physical forces.

Another key aspect that comes with material properties is resistance to corrosion and abrasion.

Overhead power line accessories are exposed to elements of nature hence they are bound to undergo corrosion and abrasion.

The fitting should be coated with anti-corrosive and anti-abrasive agents so that it can have full protection.

Electrical Property of the transmission line fitting

Since these power line accessories will be used for the transmission of electric energy, they need to have desirable electrical properties.

One of the key electrical properties is the ability of an overhead power line fitting to withstand the fault current. This is the current that is produced when there is a short circuit on the power line.

The transmission accessory should also be capable of preventing hysteresis loss. This is the current that is created as a result of the interaction between electric current and magnetic field.

In general, an excellent electrical property is when the power line fitting does not cause any interference with the normal flow of electric current.

Design properties of the transmission line

Design property defines the general outlook of the overhead power line fitting. It highlights issues such as the shape and dimensions of the accessory.

The design property will determine how the fitting will be installed and how it will connect with other components on the pole.

Another design property that you need to look at is the dimension. Check all the measurements of the accessory such as length, diameter, thickness, among others.

You should also confirm the shape and angle of alignment of the power line fitting. They should match your requirements.

While buying transmission hardware fittings, ensure that the dimensions of the design are accurate. A well-designed fitting will function effectively as expected.

You will also have an easy time when installing an overhead power line accessory that has been designed for precision.

How to choose an overhead power line fitting manufacturer?

Among the many critical decisions that you will make when buying power transmission accessories, one of them is choosing the manufacturer or supplier of the fittings

Even though it may seem to be a non-issue, it is something that can affect the quality of the overhead power line fitting that you buy.

Buying from the best transmission line hardware manufacturer will guarantee you quality overhead fitting. The reverse is true if you choose to buy from a not so reputable manufacturer.

Here are some of the tips that you can use when looking for the best overhead power line fitting manufacturer in China.

-Experience of the manufacturer

You should consider choosing an overhead power line manufacturer who is more experienced in the field of power line accessories.

The more the experience, the higher the chances of getting quality power line fittings.

Before you get into deep engagement with the manufacturer, confirm the number of years that they have been in the business.

-Overhead pole line accessory reviews

This is another way of proving whether the manufacturer can be trusted to produce the fittings or not.

You only need to gather information from other buyers who have bought the power line fittings from the manufacturer.

This information can be obtained from the manufacturer’s website or other online marketplaces such as Alibaba.

If many buyers are expressing positive reviews about the product, then you should consider buying the equipment

On the other hand, you should tread with care if the manufacturer has quite a good number of negative reviews.

-Production capacity

You should not ignore the production capacity of the overhead hardware manufacturer. Is the company capable of meeting your needs?

This is vital especially if you want to buy power line hardware in bulk.

One way of assessing the production capacity is checking whether the manufacturer has the right equipment and manpower to fulfil the demand for the accessories.

You should consider visiting the manufacturer’s premises and inspecting the facility so that you can be sure that they are in a position to handle your demand for the overhead power line hardware.

-Customer care services

You should also be keen on how the manufacturer is treating you right from the moment that you make a call to place your order for the power line fitting.

The manufacturer should be accountable and transparent in all the dealings regarding the purchase of the equipment.

For example, ensure that the fittings are backed with a warranty as it shows that they are fully responsible for their product.

PowerTelcom- Reliable Overhead Power Fitting Manufacturer

At Powertelcom, we are proud to be among the most reliable transmission and distribution line hardware manufacturers in China.

The top notch innovation and quality that has always made our products stand out are because of the extensive experience we have gained over the years. We have a production following a market-oriented approach that manifests all achievements that have taken place among the industrial panorama.

We design and manufacture quality power line accessories that are durable while at the same perform exceptionally well.

Our overhead line accessories, overhead line hardware, and overhead line materials are products of a remarkable experience as electrical overhead line material manufacturers of transmission line fittings makes us proficient in providing products that improve through the most recent and innovative technology in complete harmony with the technical evolution that was programmed in the field in the last decade or so.

We also customize the overhead pole line fittings according to your requirements.

All that you need is to contact us and state your requirements.

What more can you get from PowerTelcom?

With ample experience in the market for overhead line fittings, we are the electrical overhead line material manufacturers that provide our services to a broad range of clients, each having customized needs. With the help of experienced and professional engineers, workers, and an integrated system for providing services, you can get the best at affordable rates through our company as we cater to the needs of every client and help them make as much profit as they can get from the best material and minimum damage.

All of our products can be covered through the help of an air bubble film prior to the final packaging for better shock absorptive capabilities, resistance to impact, sealing of heat, benefits for an odorless, moisture free, corrosion free, and transparent look.

The organization includes repairs for free for any kind of product having failures in the manufacturing for a lot of years of experience in the overhead line fittings industry as customers can bring them for repair and modifications. We assure you that we cost a minimum market rate to create ease for our customers, that way, more of our customers get satisfied with our services. As we do not compromise on the quality but at the same time want to sell that product at highly affordable price rates, our customers deserve to be treated as the best. Moreover, our customers get very happy to get cost effective products that have a long shelf life.

So, if you want to get our services for the equipment and product of your demand, you can just simply contact us and we assure you that we will be there for you. Our highly professional team will deal with your queries and furthermore, you are welcome to get us any critics so that we may be able to work on the criticism and get the advantages you want at highly affordable as well as cost effective prices.

Overhead Power Fitting in Powertelcom

Powertelcom adopts a highly purified cathode made from about 99 per cent of copper, good grade silver, and an extremely high quality alloy of phosphorus and copper. We, therefore, are proud to say that we use purified material for the manufacture of our products.

According to different standards pertaining to our field of work and services, better control on product quality with semi finished final products.

The company adopts to moderate frequency cast line for melting and mixing of the electromagnet to make sure that the content of the final product is highly uniform and is able to do the reduction of the oxide that can possibly corrode the final material thus affecting its quality

Our output is all based on the patent cooperation and trustworthiness of all our customers. For better plasticity and flexibility, our company and its team of highly skilful and experienced professionals make sure they do not compromise on the quality of the final product as it is the reflection of what we do as a business and what services do we provide for the customers.

The completely efficient and effective machines save the cycle time spam of the production manufacturing wing that enhances our yield. This ultimately helps us in building a good repute and is easily referred to as the other.

We believe in excellence, brilliance, and efficiency when it comes to the manufacturing of the overhead line fittings for our customers belonging to all fields and having the requirements of all kinds, we personalize according to the specific needs of all of our clients to keep them satisfied.

We prefer to provide nothing but the best and customer service is our priority. We believe that with the help of our highly prepared and skilful professionals, we are able to give way to sustainable, empowering and long term relationships between the customers and the employees, and even the company as a whole.

A good repute in our customer experience years has made us among the leading brand when it comes to overhead fitting lines, where we compromise on nothing and are enthusiastic in providing to our worthy customers with nothing but the best. We listen to every detail and make a schematic view of all the possibilities using which we can make your material stand out and more effective through the integration of our effective skills as well as years of expertise and expertise in the field. With working with us, we assure you that you will not feel you are settling for any less as we always prioritize our customers all the time and we highly acknowledge that the success of our clients means a lot to me.

Whatever the nature of the material and no matter the type or quantity of the material you want to order from using our word class services, we recommend you take help and consultation services from our team of experts to clear any confusion and misunderstanding. Another important thing is to make sure that your order contains all the details so you can get a product as customized and functional as it gets.

FAQ

What are overhead line fittings?

Overhead line fittings are accessories used in aerial construction that supports the overhead electrical lines and overhead systems, there are different manufacturing standards in order to adapt to different environments and voltage requirements.

What is the hot dip galvanization test standard?

There are a few kinds of hot dip galvanization testing standard for the overhead line fitting, for example: For the Asia market, like Malaysia and Indonesia, they test the hot dip galvanization according to ISO. For the South America, they test the hot dip galvanization according to ASTM123.

Can I get a sample before placing an order?

Yes, of course. It’s a necessary step to confirm the sample before the mass production. If the type of overhead line fittings you required is in stock, the customer will only burden the express cost and have the sample for free. If you need to make new samples according to your drawing, you should charge the sample cost.

Who will charge if making a new design?

The manufacturer usually charges the tooling, if you don’t accept our present power fitting type. The manufacturer will make new tooling based on your design, and the new tooling belongs to you. The manufacturer just help you to take care of the tooling in our factory. If you have paid for it, the manufacturer can also refund you the tooling cost if you ordered a certain quantity.

If you are looking for more details, kindly visit 11kv Pin Glass Insulators.