Trefoil Cable Cleats

Trefoil Cable Cleats for Single-Core Power Cables

Trefoil Cable Cleats are fixings for cables that are made to hold three single-core cables in a triangle shape. This stops the cables from moving during short-circuit faults. These studs are made by Avantar according to IEC 61914 standards. They can handle cable diameters from 20 mm to 100 mm and a peak current of 85 kA. There are three types of materials: LSFH polymer, aluminium alloy, and stainless steel. These can be used in a range of settings, from indoor substations to places near the coast.

What Are Trefoil Cable Cleats and How Do They Work?

In a single-core cable system, when there is a short-circuit fault, strong electromagnetic forces act on each cable. If cables aren't held in place properly, they can move or get mechanical damage at the fault.

The items hold three single-core wires arranged in a triangle shape. This shape helps spread electromagnetic forces across the cleat body and lowers the magnetic fields that are created between the wires that are grouped together.

A properly chosen and set up cleat system keeps cables in place during faults, which lowers the chance of cable-to-cable contact or damage to the structure of cable support systems.

Key Features

• 85 kA peak short-circuit withstand — manufactured to IEC 61914 requirements
• Cable diameter range: 20 mm to 100 mm — covers common single-core medium and high-voltage cable sizes
• LSFH polymer option — flame-retardant, low-smoke, halogen-free, UV-resistant
• Aluminum alloy option — lightweight with solid mechanical strength for outdoor use
• Stainless steel option — suitable for coastal, salt-spray, or heavily polluted sites
• Single or double bolt mounting — adaptable to different cable tray and support structures
• Trefoil formation — reduces induced magnetic fields between grouped single-core cables

Material Options for Different Site Conditions

Selecting the correct material grade for your site environment affects long-term mechanical performance and compliance. Avantar offers three options:

All three material grades meet IEC 61914 short-circuit withstand requirements and accommodate cable diameters from 20 mm to 100 mm.

If you are uncertain which grade fits your site conditions, share your environment description and our technical team will provide a recommendation.

Technical Specifications

Custom Design Options

Most project needs can be met by standard catalogue sizes. Avantar can also make custom configurations for projects that need cables with outside sizes that aren't standard, bolt hole spacing that needs to be exact, or mounting bracket profiles that need to be exact for cables with diameters between 20 and 100 mm.

We can take OEM and ODM orders based on your drawings or technical details. Before production starts, our tech team looks over the parameters you send us and makes sure they are possible.

How to Specify?

Preparing the following information helps ensure the correct cleat model, material grade, and mounting configuration for your project:

1. Cable outer diameter (mm) — confirm all three single-core cables fall within 20–100 mm
2. System short-circuit level (kA peak) — confirm your network's maximum fault current against the 85 kA peak rating
3. Site environment — indoor substation, outdoor yard, tunnel, coastal, or polluted industrial area
4. Mounting preference — single bolt or double bolt fixing
5. Required certifications — IEC 61914, RoHS, UL 224, or project-specific documentation

Sample units are available for on-site fit checks before bulk orders. Contact our team with the above details to receive a confirmed model recommendation and quotation.

Applications

Trefoil cable cleats from Avantar are used across a range of electrical infrastructure projects:

• Substations — medium and high-voltage cable management in switchgear rooms and cable cellars
• Cable tunnels and corridors — securing grouped single-core cables along tunnel trays and ladder racks
• Wind and solar farms — renewable energy cable runs requiring IEC 61914-compliant restraint
• Industrial plants — high-current cable installations in manufacturing, petrochemical, and processing facilities
• Rail and infrastructure projects — power cable systems in transport tunnels and urban infrastructure

FAQ

Q: What are the items, and why are they used in setups of single-core power cables?

A: The products hold three single-core wires in a triangle shape to protect them from the electromagnetic forces that happen during short-circuit faults. These forces can move wires and damage them mechanically if they are not restrained. The studs made by Avantar are made to IEC 61914 standards, can handle wire diameters between 20 and 100 mm, and can handle up to 85 kA of peak fault current.

Q: Does Avantar make things or do they just sell them?

A: Avantar is a direct manufacturer. For IEC 61914 compliant cleats, our factory in Guangdong cuts, shapes, treats the surface, and checks the performance of the materials in-house. When you order directly from the factory, you can get technical help for your specific project needs without having to go through extra steps.

Q: What kind of company is Avantar? How do I know which grade of material to use for my site?

A: LSFH polymer can be used in enclosed tunnels and indoor substations that need to meet fire safety standards. For general outdoor substation use, aluminium alloy is a good choice. Stainless steel is best for industrial sites that are near the coast, get a lot of salt spray, or are very polluted. IEC 61914 says that all three materials can handle short-circuits up to 85 kA peak.

Q: What kind of company is Avantar? What kinds of certifications are out there, and how can I check on performance before placing a big order?

A: There is an IEC 61914 test record and a certificate of origin in every shipment. RoHS compliance documents can also be sent to you if you ask for them. For big tasks or bid-based ones, buyers can choose any third-party agency to do a pre-shipment inspection. Before making a lot of them, small test orders can be made so that the fit can be checked on-site.

Q: What kind of company is Avantar? What is the minimum order quantity (MOQ) and how long is the wait time?

A: As a general rule, the MOQ for each model is 100 pieces. It takes 5–10 working days for standard catalogue items to get to you after you confirm your order. You can choose between sea freight, air freight, and fast courier. You can check on EXW, FOB, and other trade terms when you place your order.

Q: Can the clamping opening be changed to fit cables that aren't standard sizes?

A: Yes. The inside space can be changed to fit cable outside diameters between 20 and 100 mm. For OEM and ODM projects, we can make bracket profiles, bolt hole spacing, and mounting configurations that are unique based on the drawings or specifications you send us.

Contact Us

For product inquiries, sample requests, IEC 61914 test reports, or project quotations for Trefoil Cable Cleats, contact our team at [email protected]. We will respond with the information you need.