Product Description

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Suspension clamps are used to hang conductors or ground wires to insulators or link fittings to tower arms and substation structures. 

A suspension clamp is designed to give the conductors both physical and mechanical support. This is important especially when you have installed the conductors for the power transmission line and even telephone lines.

Suspension clamps enhance the stability of the conductor by limiting their movements especially against a strong wind, storm, and other vagaries of nature.

Made of aluminum alloy or malleable cast iron, suspension clamps are characterized by their strength, durability, and reliability. The aluminum alloy suspension clamp is lightweight and corrosion-resistant, making it easy to handle and suitable for various environments.  The malleable cast iron suspension clamp offers high tensile strength, impact resistance, dimensional stability, and heat resistance, making it ideal for heavy-duty applications and elevated temperatures. 

Suspension clamps feature a clever ergonomic design that ensures that the weight of the conductor is evenly distributed on the clamp’s body. This design also provides perfect angles of connection for the conductor. In some cases, counterweights are added to prevent the conductor’s uplift.

Other fittings such as nuts and bolts are used along with the suspension clamps to enhance the connection with the conductors.

You may also request a custom design of a suspension clamp to suit your application area. This is vital since some suspension clamps are designed for single cables while others are for bundle conductors.

Custom size and requirements are available upon request.

Suspension Clamp Complete Buying Guide

Outline

Introduction to Suspension Clamps

Importance of Suspension Clamps in Electrical Installations

Factors to Consider When Buying Suspension Clamps

Different Types of Suspension Clamps

Understanding Suspension Clamp Specifications

Proper Installation Techniques for Suspension Clamps

Maintenance and Inspection of Suspension Clamps

Common Mistakes to Avoid When Buying Suspension Clamps

Best Practices for Choosing and Using Suspension Clamps

Conclusion

FAQs

Suspension clamps are vital components in electrical installations, providing support and stability to overhead cables. Whether it's for power distribution lines, telecommunication networks, or other applications, choosing the right suspension clamp is crucial to ensure a reliable and secure installation. In this complete buying guide, we will explore the key factors to consider, different types of suspension clamps available, understanding specifications, proper installation techniques, maintenance tips, common mistakes to avoid, and best practices for choosing and using suspension clamps.

Introduction to Suspension Clamps

Suspension clamps are hardware devices designed to suspend and secure overhead cables, preventing them from sagging or being damaged due to environmental conditions or mechanical stress. These clamps play a critical role in maintaining the integrity and reliability of electrical systems, ensuring optimal performance and safety.

Importance of Suspension Clamps in Electrical Installations

Suspension clamps are essential in electrical installations for several reasons. Firstly, they provide mechanical support to overhead cables, preventing excessive sagging and maintaining the desired clearance from the ground or other objects. This helps to prevent damage to the cables and ensures consistent performance.

Additionally, suspension clamps help to distribute the weight of the cables evenly, minimizing stress on individual conductors and supporting structures. They also aid in reducing vibrations and oscillations caused by wind or other external factors, which can lead to wear and tear or electrical disturbances.

Factors to Consider When Buying Suspension Clamps

When purchasing suspension clamps, it is essential to consider several factors to ensure the right fit for your specific application. Here are some key factors to keep in mind:

Durability and Strength

Suspension clamps should be made from high-quality materials that can withstand environmental conditions, such as temperature variations, humidity, and exposure to UV radiation. The clamps should also have sufficient strength to support the weight and tension of the cables they are designed for.

Material Composition

Suspension clamps can be made from various materials, including stainless steel, aluminum alloy, and composite materials. Each material has its advantages and considerations in terms of strength, corrosion resistance, conductivity, and cost. The choice of material depends on the specific requirements of the installation.

Load Capacity

It is crucial to determine the maximum load capacity of the suspension clamp, which should match the anticipated load of the cables it will support. Exceeding the load capacity can compromise the structural integrity and safety of the installation.

Installation Method

Different suspension clamps have varying installation methods, such as bolted, wedge, or preformed clamps. The installation method should be compatible with the type of cable and the installation environment. It is essential to follow the manufacturer's guidelines for proper installation.

Compatibility with Cable Type

Suspension clamps are designed for specific cable types, such as bare conductors, insulated cables, or optical fiber cables. It is crucial to ensure that the clamp is compatible with the cable type to ensure proper gripping, electrical continuity, and insulation integrity.

Different Types of Suspension Clamps

Suspension clamps are available in various designs to accommodate different installation requirements. Here are some commonly used types of suspension clamps:

Parallel Groove Clamps

Parallel groove clamps are widely used for bare conductors and are designed with grooves that securely grip the conductors. They provide excellent mechanical strength and electrical conductivity.

U-Bolt Clamps

U-bolt clamps feature a U-shaped bolt that holds the cable in place against a saddle. They are commonly used for securing aerial bundled cables and provide a secure and reliable connection.

Wedge Clamps

Wedge clamps utilize a wedge-shaped piece that tightens against the cable, holding it firmly in place. They are often used for self-supporting cables and offer quick and easy installation.

Bolted Suspension Clamps

Bolted suspension clamps feature bolts that securely fasten the clamp to the supporting structure. They provide high load capacity and are suitable for heavy-duty applications.

Preformed Suspension Clamps

Preformed suspension clamps are designed with a preformed grip to match the shape of the cable, providing optimal support and reducing stress concentrations. They are commonly used for optical fiber cables.

Understanding Suspension Clamp Specifications

To make an informed buying decision, it is essential to understand the specifications associated with suspension clamps. Here are some key specifications to consider:

Maximum Load Capacity

The maximum load capacity indicates the maximum weight that the suspension clamp can support without compromising its integrity or safety. It is important to select a clamp that matches or exceeds the anticipated load requirements.

Conductor Range

The conductor range specifies the diameter or size of the conductors that the suspension clamp can accommodate. It is crucial to choose a clamp that fits the specific conductor size to ensure proper gripping and electrical continuity.

Diameter Range

The diameter range refers to the allowable range of cable diameters that the suspension clamp can accommodate. It is essential to select a clamp that matches the diameter of the cables to ensure a secure fit.

Insulation Type

For suspension clamps used with insulated cables, it is important to consider the compatibility with the insulation material and the specific requirements for insulation integrity and electrical safety.

Temperature Rating

Some suspension clamps have temperature ratings that indicate the range of temperatures they can withstand without compromising their mechanical properties or electrical performance. This is especially important for installations in extreme temperature environments.

Proper Installation Techniques for Suspension Clamps

Proper installation techniques are crucial to ensure the effectiveness and longevity of suspension clamps. Here are some important steps to follow during the installation process:

Pre-Installation Checks

Before installing suspension clamps, it is important to conduct pre-installation checks, such as inspecting the clamps for any visible defects, verifying the compatibility with the cable type, and ensuring all necessary accessories and hardware are available.

Correct Alignment and Positioning

The suspension clamps should be aligned correctly and positioned at the desired locations along the cable route. Proper alignment and positioning help to distribute the weight evenly and prevent excessive stress on individual clamps.

Adequate Torque and Tightening

During the installation process, it is essential to apply the correct torque and tightening to ensure a secure and reliable connection. Under-tightening can result in loose clamps, while over-tightening can damage the clamps or cables.

Ensuring Secure Gripping of Conductors

The suspension clamps should securely grip the conductors without causing damage or deformation. It is important to follow the manufacturer's guidelines and recommendations for proper gripping techniques.

Maintenance and Inspection of Suspension Clamps

Regular maintenance and inspection of suspension clamps are important to identify any potential issues and ensure their continued performance. Here are some maintenance and inspection tips:

Regular Cleaning and Visual Inspection

Periodically clean the suspension clamps to remove any dirt, debris, or contaminants that can affect their performance. Conduct visual inspections to check for signs of wear, corrosion, or damage.

Checking for Loose Fasteners

Inspect the fasteners, such as bolts or screws, to ensure they are properly tightened. Loose fasteners can compromise the stability and effectiveness of the suspension clamps.

Monitoring for Signs of Wear or Corrosion

Pay attention to any signs of wear, corrosion, or degradation of the suspension clamps. Promptly address any issues to prevent further damage or potential safety hazards.

Common Mistakes to Avoid When Buying Suspension Clamps

When purchasing suspension clamps, it is important to avoid common mistakes that can lead to unsatisfactory performance or safety risks. Here are some mistakes to avoid:

Neglecting Load Capacity Requirements

Ignoring the load capacity requirements can result in using suspension clamps that are not designed to handle the anticipated weight, leading to potential failures or safety hazards.

Overlooking Compatibility with Cable Type

Using suspension clamps that are not compatible with the specific cable type can result in poor gripping, insulation issues, or inadequate support, jeopardizing the overall integrity of the installation.

Ignoring Environmental Factors

Failure to consider environmental factors, such as temperature variations, humidity, or exposure to corrosive substances, can lead to premature deterioration of the suspension clamps and compromise their performance.

Failing to Follow Manufacturer Guidelines

Neglecting the manufacturer's guidelines for installation, maintenance, and inspection can result in improper usage or inadequate performance of the suspension clamps.

Best Practices for Choosing and Using Suspension Clamps

To ensure the best performance and safety of suspension clamps, here are some recommended best practices:

Consultation with Professionals

For complex or critical installations, it is advisable to consult with professionals or engineers experienced in electrical installations. They can provide expert advice on selecting the appropriate suspension clamps and ensuring proper installation.

Quality Assurance and Certification

Choose suspension clamps from reputable manufacturers that provide quality assurance and certifications. Look for products that comply with industry standards and have undergone rigorous testing and evaluation.

Compliance with Safety Standards

Ensure that the selected suspension clamps meet the necessary safety standards and regulations applicable to your specific installation. Compliance with safety standards is crucial for reliable and safe electrical systems.

Regular Maintenance and Replacement

Implement a regular maintenance schedule to inspect suspension clamps and replace any damaged or worn-out clamps promptly. This helps to prevent potential failures and ensures the longevity of the installation.

Conclusion

Selecting the right suspension clamps is essential for the success and reliability of electrical installations. By considering factors such as durability, load capacity, installation method, and compatibility with cable type, you can make informed decisions. Proper installation techniques, regular maintenance, and adherence to safety standards are critical for ensuring optimal performance and safety. By following the guidelines and best practices outlined in this buying guide, you can confidently choose and use suspension clamps for your specific needs.

FAQs

1. What is the purpose of suspension clamps in electrical installations?

Suspension clamps are used to support and secure overhead cables, preventing excessive sagging and maintaining clearance. They distribute the weight of the cables, reduce vibrations, and ensure the integrity of the electrical system.

2. Can suspension clamps be used for different types of cables?

Suspension clamps are designed for specific cable types, such as bare conductors, insulated cables, or optical fiber cables. It is important to choose clamps that are compatible with the cable type to ensure proper gripping and performance.

3. How do I determine the right size of suspension clamp for my project?

To determine the right size of suspension clamp, consider factors such as conductor range, diameter range, and load capacity. Match the clamp specifications with the diameter and load requirements of your cables.

4. Are there any specific installation requirements for suspension clamps?

Yes, there are specific installation requirements for suspension clamps. Follow the manufacturer's guidelines for alignment, positioning, torque, and tightening. Ensure the clamps securely grip the conductors and are installed according to recommended methods.

5. How often should suspension clamps be inspected and replaced?

Suspension clamps should undergo regular visual inspections for signs of wear, corrosion, or damage. Implement a maintenance schedule and replace any damaged or worn-out clamps promptly. The frequency of inspections may depend on the specific installation and environmental conditions.

Suspension Clamp Complete Buying Guide

Are you setting up an overhead transmission line or telephone line project? One of the pole line accessories that you may consider buying is the suspension clamp. Like most accessories, this fitting has a significant role that it plays.

Are you looking for quality and affordable suspension clamps for transmission line or telecommunication line?

Here is a perfect guide for you.

I am going to give you full guidance for choosing and buying the best suspension clamps. I will also guide you on how to choose reliable suspension clamp suppliers and manufacturers in China.

What is a Suspension Clamp?

A suspension clamp is a fitting that is designed for suspending or hanging cables or conductors to the pole. In other cases, the clamp can suspend cables to the tower.

Since the cable is directly connected to the conductor, its specifications need to match with that of the cable so as to create a perfect connection.

A suspension clamp hangs the cables at different points and angles depending on the requirements of the project.

What are the Uses and Applications of a Suspension Clamp?

While the primary use of suspension clamp is to suspend hang or suspend a conductor, there are other roles that it plays.

A suspension clamp protects the conductor during the installation of the transmission line onto the pole.

The clamp also provides a mechanical connection by ensuring that there the right longitudinal grip on the transmission line.

Suspension clamps also control the movement of cables against external forces such as wind and storm.

From the above listed uses, suspension clamp is applicable in different projects that have conductors hanging from poles.

The most common applications are electrical pole overhead lines and telephone transmission lines.

Parts and Components of Suspension Clamp

From a distance, you can easily assume that a suspension clamp is a single homogeneous accessory. The truth of the matter is a suspension clamp comprises of different parts which include:

1. The Body

The body is the supporting frame of a suspension clamp for the conductor. It supports the whole fitting.

The body is made of aluminium alloy which apart from being strong is also resistant to scratches and corrosion.

2. Keeper

The keeper of a suspension clamp plays the role of connecting the conductor of a transmission line to the body of the suspension clamp.

3. Straps

These are string-like structures that are responsible for transferring the load from the axis of oscillation straight to the insulator string.

These straps are capable of playing this role because they are made of coated zinc material.

4. Washers

The washers of a suspension clamp are usually put into use when the clamping surface is not rested perpendicularly.

They are made of steel to provide the necessary support while at the same time resist corrosion.

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5. Bolts and Nuts

Since a suspension clamp is also a mechanical device, there will always be a need to secure all the connections.

This is where the role of bolts and nuts come into play. Any connection that is made to a suspension clamp is completed using bolts and nuts.

Bolts and nuts are also made of steel for strength and resist corrosion.

6. Threaded Inserts

When you see threads or bushings on a device, the first thing that should come into your mind is the device needs to be fastened.

The threaded inserts of a suspension clamp are simply fastening elements. They are inserted to elements that have threaded holes to complete the connection.

Threaded inserts are also made of stainless steel.

Types of Suspension Clamps

Suspension clamps are versatile power line fittings. They are not all the same. They come in different models making them suitable in their respective areas of applications.

This simply means that a suspension clamp that designed for a particular use may not be suitable for another application.

Some are even cable-specific whereby they can only be used on specific types of conductors.

The most common types of suspension clamps include:

-AGS  suspension clamp

-Suspension clamp for ABC cable

-Suspension clamp for ADSS cable

-Suspension clamp for OPGW cable

-Suspension clamp for HT&LT cable

-Preformed suspension clamp

-Cable suspension clamp u-type

-Double suspension clamp

Which cable are you using on your overhead transmission line? From the above list, you should be able to identify the right suspension clamp for the job.

If you are not sure, feel free to invite a suspension clamp expert who can help you choose the right model.  Consultation with reliable suspension clamp manufacturers will also be helpful.

Design Requirements of Suspension Clamp

Apart from just worrying about the types of suspension clamps, you need to get into the outlook and functionalities of the clamp.

These two factors are defined by the design, mechanical and technical requirements of the pole line accessory.

A well-designed suspension clamp will ensure that there is a smooth coordination b with the cable and other components.

Some of the essential design aspects that you should focus on include:

-Anchor clamp: The anchor clamp, which is next to the conductor, should be able to move freely.

This design is achieved only if the trunnion of the clamp is part of the body.

-Design of straps: Before you buy a suspension clamp, ensure that its straps are round-shaped and their sizes match with the size of the trunnion.

-Conductor supporting groove: Ensure that the conductor supporting groove of a suspension clamp has the right measurements for your application.

On the other hand, the keeper should not have any sharp edges that can result in any irregularities.

-Bolts and Nuts: You should confirm the design requirements of bolts and nuts so that they can perfectly fit onto the suspension clamp when completing connections.

Ensure that the bolt of a suspension clamp can protrude through the threads.

Mechanical Requirements of Suspension Clamp

The mechanical requirements of the suspension clamp for the conductor define the operability of the suspension clamp.

How does a clamp operate or behave after it has finally been installed?

One of the most basic mechanical requirements is the suspension clamp should be able to withstand deformation load without snapping or undergoing physical damage.

Also, the clamp should sustain the force of bolts and nuts when they are being tightened.

 

Powertelcom-Suspension Clamp Manufacturer

Wondering where to buy quality suspension clamp for overhead lines?

The best answer is you should buy from reliable suspension clamp manufacturers and suppliers in China.

Reputable suspension clamp suppliers will do all that it takes to ensure that you get quality products.

You can also be sure of getting quality sales services from the best suppliers.

At Powertelcom, we are proud to be among the most-trusted suspension clamps suppliers in China.

If you would like to know more about suspension clamps for sale, take the step of contacting us directly. We will tell you everything that you should know about suspension clamps.

Frequently asked questions (FAQ)

What is a Suspension Clamp?

It is a transmission line hardware that is used for clamping cables and conductors to the insulator strings, poles, and even to the towers. The design and construction of the clamp can handle extreme loads of the insulators.

Why are suspension clamps used?

Suspension clamps provide the required mechanical support regardless of the condition of the conductor. They also control or restrict the movement of the conductor especially due to external forces such as wind and storm. The clamps also promote the safety of the conductor and people by preventing voltage leakage.

What are the types of suspension clamps?

 

The most common types of suspension clamps include:

-AGS suspension clamp

-Suspension clamp for ABC cable

-Suspension clamp for ADSS cable

-Suspension clamp for OPGW cable

-Suspension clamp for HT&LT cable

-Preformed suspension clamp

-Cable suspension clamp u-type

-Double suspension clamp

 

What are the parts of a suspension clamp?

The body forms the main component of the suspension clamp. It provides an attachment point for the conductor. The clamp has straps that transfer the load from the axis to the insulator strips. The washers provide support whenever the suspension clamp is attached perpendicularly. The nuts and bolts are used for completing connections.

What materials are used for suspension clamps?

All the materials for different components of the suspension clamp must be compatible with the conductor. Steel alloys and high-strength aluminum alloys are the two most common materials for the suspension clamp. Apart from the main clamping body, fasteners such as nuts and bolts are also made of corrosion-resistant steel.

ADSS Suspension Clamp

The base is attached by a rear hinge for quick and easy installation of ADSS cables Cushioned pad made of UV resistant neoprene sleeve insert to gently hold the ADSS cable in place Includes stainless steel bolts and locking washers for locking clamps

Product Description

 

ADSS Suspension Clamp

Suspension clamps are also called fixture suspension or suspension fittings. According to the application, the suspension clamps are divided into ABC optical cable suspension clamps, ADSS optical cable suspension clamps, and overhead line suspension clamps.

 

 

 

ADSS Optical Cable Suspension Clamp

Suspension cleats for ADSS cables are also known as prefabricated suspension cleats. Prefabricated catenary clamps that function the same as ordinary catenary clamps are designed to suspend conductors or ground wires in a vertical direction.

Huaneng prefabricated suspension clamps are suitable for high voltage above 220kv. Unique features of prefabricated suspension clips:

Effective protection of conductors
Avoiding Electricity Waste Due to Corona
easy installation
Prefabricated suspension clamps are designed to protect ADSS (All Dielectric Self Supporting) cables from sloshing caused by wind currents. Suspended clamps are widely used in transmission lines, towers or power distribution systems.

The distance between the two towers is called the span. For short spans, prefabricated suspension clamps with O-rings are often used. This kind of suspension clamp has the characteristics of lightest weight, convenient installation, and can protect ADSS optical cable more effectively.

For mid-span and long-span, there is also a prefabricated suspension clamp that is aluminum-clad. The Armor Clip Suspension connects with U-Clips to hang cables. Aluminum-clad suspension clamps support and protect ADSS fiber optic cables from bending damage.

According to the span, the short span adopts single suspension clamp, and the long span adopts double suspension clamp.

Composition: inner pre-twisted wire, the outer pre-twisted wire, rubber insert, cast aluminum shells, right-angle shackle, U-type shackle.

Purposes: supporting cable, make the ADSS hang on the tower.

Features:

a, stress on average, no concentration stress, protect cable better.

b, good dynamic stress. It can provide enough grip strength(14%RTS)

c, rubber clip block make abrasion low .

d. rounded end improve the corona voltage

e. excellent aluminum alloy improve the mechanical and resist-corrosion function, extend life.

Technical requirements: meet the DL / T 766-2003 ADSS with the preformed helical fittings technical requirements and test methods.

 

Applications

The preformed ADSS drape clamp is the connecting hardware for ADSS cables suspended from transmission line poles (towers). It reduces the static stresses at the support points, improves the vibration resistance of ADSS cables and buffers the dynamic stresses of wind vibration.

 

 

Ordering Information:

A. Choose the suitable XC suspension clamp according to the outer diameter, span, rated tension strength of ADSS cable etc. parameters

B. the quantity configuration: 1 set / line tower.

C. if the clamp need to install the corona coils and vibration damper, the inner performed wire need to prolong

D. clamp strength: 30KN, 50KN, 70KN etc.

 

Structure and materials.

Shell - Made of corrosion resistant cast aluminium alloy, good stability, good corrosion resistance and good mechanical properties.
Rubber inserts---Consisting of high-grade rubber and central reinforcement components, the rubber inserts are ozone resistant, chemical resistant, weather resistant, with high and low temperature performance, high strength and elasticity, and small compression deformation.

Bolts, flat washers, spring washers, nuts, split locks, disconnectors - standard parts for electricity.
Internal preformed bar --- customised aluminium alloy wire according to mechanical properties and chemical composition, with high tensile strength, hardness strength and excellent elasticity, strong rust resistance, can be used in bad weather long-term health) condition.

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China Preformed armor grip spiral cable suspension clamp for ADSS/OPGW Manufacture and Factory

Preformed armor grip spiral cable suspension clamp for ADSS/OPGW

Description
The wire suspension clamp is designed to connect ADSS cable to pole/tower in the straight line. They feature in handiness, ease, with certain load capacity to resist moving.
Aluminum Alloy Preformed Dead End Guy Grip with Insulation Coating(SNAL) is for fixing terminals of the ground wire of overhead lines.
The guy-grip dead end clamp for conductor can be applied to bear strain on overhead bared or insulated covered conductors in transmission & distribution lines.
It’s the substitutes of the traditional dead end clamps such as bolted type, compression type and wedge type.

Aluminum alloy dead end grip with insulation coating for telecom cable, insulator conductor, fiber cable, TV cable, Digital cable

The aluminum alloy dead end grip with insulation coating has the main function to fix a pole/tower the cables, conductors, strands, structures

The area of the loop always must be protect with a suitable thimble, pulley, insulator etc.
Material.
Ground wire for steel conductor; wire clamp is used for galvanized steel.
Aluminum-clad steel, good conductor ACSR, wire clamp is used for aluminum-clad steel wire.

 

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