Suspension Clamp for Overhead Lines and Transmission Lines

Suspension Clamp Complete Buying Guide

Are you setting up an overhead transmission line or 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.

Contact us to discuss your requirements of OPGW Preformed Double Suspension. Our experienced sales team can help you identify the options that best suit your needs.

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 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.

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.

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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- 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.

 

 

FIBERFUTURE® ensures a continuing level of quality in our cable products through several quality control programs including ISO . We ensure the product reliability through rigorous qualification testing of each product family.Both initial and periodic qualification testing are performed to assure the cableʼs performance and durability in the field environments.

 

GENERAL
There are different test series to assure the quality of OPGW:
- Routine test (in&#;process testing according to internal quality plan)
- Factory acceptance test (FAT, witnessed by customer)
- Type test (only in case of a basic new design, repetition in exceptional cases)
OPGW tests shall be in accordance with applicable standards or agreements between purchaser and manufacturer.
As a general rule the tests will be performed according IEC -4-10.However, if necessary tests can be done according to IEEE Std.

Type test
Type test may be waived by submitting makerʼs certificate of the similar product performed
in an internationally acknowledged independent test organization or laboratory. If type test
should be performed, it will be carried out according to an extra type test procedure reached
to an agreement between purchaser and manufacturer.

Routine test
The optical attenuation coefficient on all production cable lengths is measured according to IEC -1-CIC (Back-scattering technique, OTDR). Standard single-mode fibers are measured at nm and at nm. Non-zero dispersion shifted single&#;mode (NZDS) fibers are measured at nm.

Factory test
Factory acceptance test is carried out on two samples per order in the presence of the customer or his representative. The requirements for quality characteristics are determined by relevant standards and agreed quality plans.

 

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