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.
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.
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.
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.
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:
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.
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.
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.
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.
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.
Suspension clamps are available in various designs to accommodate different installation requirements. Here are some commonly used types of suspension 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 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 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 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 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.
To make an informed buying decision, it is essential to understand the specifications associated with suspension clamps. Here are some key specifications to consider:
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.
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.
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.
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.
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 are crucial to ensure the effectiveness and longevity of suspension clamps. Here are some important steps to follow during the installation process:
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.
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.
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.
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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.
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:
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.
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.
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.
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:
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.
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.
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.
Neglecting the manufacturer's guidelines for installation, maintenance, and inspection can result in improper usage or inadequate performance of the suspension clamps.
To ensure the best performance and safety of suspension clamps, here are some recommended best practices:
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.
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.
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.
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.
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.
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.
Suspention clamp are used to hang conductor or ground wire through insulator of link fitting to tower arms or substation structures. The clamp are made of malleable iron or aluminum alloy. The suspension angle of suspension clamps is not less than 25 degree, the redius of curve is not less than 8 times the diameter of the installed leads. The percentage of the grip on different kinds of leads to the calculating capicity of snap meets the international standard.
The suspention clamp is a kind of overhead line conductors. There are also two types of suspension hardware, including tension fittings and limited grip hardware. The suspension clamp hangs or supports the conductors, primarily bearing the vertical load hardware.
The suspension clamp is used on overhead lines or substations. They can hang the conductors or arresters on the insulators or hang the arresters on the tower by the connectors. It also used for fixing and supporting the conductor and non-linear rod on the pole.
There are numorous kinds of suspension clamps. They can be classified in different method. Here are three method to classify them. Here we will introduce three ways to classify them.
Firstly, some of the abbreviations as follow: C(X)—suspension clamp, G– fixed, S—double clamp, U—U shaped screw, J—strenghthened, H—Aluminum Alloey, F—anti-corona, K—carried up type, T—carry bag type, A—with socket clevis eye, B—with U-shaped clevis, X—hang-down type.
CGU suspension clamp is als called general type suspension clamp. The fixed u-shaped screw suspension clamp(CGU) can be costomized. All specifications are avaliable with the drawings porvided. All the products meets the international standards.
The materials: Clamp and plate–forging iron; Closed pin–stainless steel; spare parts–steel
Suspension Clamp with U-shaped Plate
Main usage and feature
The diameter of the wire clip slot is large, when it is used for large section steel-cored alumimum conductors or conductors wrapped with pre-twisted wire sheathed grommets. If you use the common hanging plate, it is easy to cause deformation. These are the two reasons the U-shaped hanging plate is added to the upper end of the wire hanging plate. Due to such a combinaton, the bending movement of the hanging plate is reduced, and also change the direction.
Componants and materials
The socket and the socket are made of forging iron
The endfittings are stainless steel
Other mateirals is steel
All the componants are hot-dip galvanized zinc and are corrusion resistent.
Here are some main features:
Clamps have high vertical devastating load;
The cable will not get out of the clamp even in the condition of unblanced icing on adjacent gears. This means the clmaps may have enough tensile strenghth;
For the clip of the lightning conductor, the grip strength should be no less than 25% of the rated tensile strength of the steel strand, and the grip of the clip for the steel core aluminum stranded wire should be no less than 30% of the rated tensile strength of the wire.
It is used for 330kv—500kv transmission line or high altitude transmission line. This kind of clamp require high anti-corona ability. Typically, the componetns of the anti-corona type includes a flared hull, two (or four) bolts (to fasten the boat hull) and the steel hoop of the suspension part in the middle of the hull, which also known as the suspension bar type.
Materials: clamp and plate—aluminum alloy; deadend link—stainless steel; spare parts–steel
This type of anti-corona suspension clip is divided into two types: line and jumper. The jumper one also can use on substation and has weak grip.
Main features:
The axis of the hull is above the centerline of the wire, and its rotation coincides with the deflection of the wire.
Characteristics: The hull axis lies below the centerline of the wire and has a tendency to be unstable, and its rotation often exceeds the deflection of the wire.
Function: It is mainly used when the overhead ground wire is placed on the top of the tower, and when the split wire is to be arranged on the bar.
Material: clamp and plate—ZL102 aluminum alloy; deadend link— stainless steel; spare parts—steel
Material: clamp and plate—ZL102 aluminum alloy; deadend link— stainless steel; spare parts—steel
Features: high strength, strong corrosion resistance, low hysteresis loss, low energy consumption and energy saving. It is also benefit to control the generation of corona. It is widely used on 330kv to 500kv transmission line or meet the requirement of the corona production in the high altitude area.
It is used on 220kV lines to replace the commonly used malleable cast iron lines, which has good economic benefits.
The hull of the wire clip is stamped from steel plate, without hanging plate. The hanging point is above the axis of the wire, and the u-bolt is upware installed for convenient construction. The production process is simple with short cycle, high yield, light weight and few accessories, etc. it is suitlable for installing steel-cored aluminum stranded wires and aluminum stranded wires of medium and small sections.
The hull, plate and clevis is cast iron, the closd pin, and other spare parts are made by steel. We use hot-dip galvanized technic for cast iron and steel.
Hysteresis loss: Due to the magnetic material in the AC iron core coil, in addition to the power loss of the coil resistance, hysteresis and eddy current can also be generated in the alternating magnetic field, resulting in power loss and heat generation.
If you are interested, our next passage is still about suspension clamp. We will introduce 7 other types of suspension clamp and how to choose a suitable suspension clamp.
Contact us to discuss your requirements of china short span suspension clamp. Our experienced sales team can help you identify the options that best suit your needs.