Durable Aluminium Transformer Lugs with 4 Holes for Electrical Systems
Conex’s Aluminium Transformer Lugs with 4 Holes are designed for secure and efficient electrical connections in transformers, offering durability, corrosion resistance, and precision engineering.
High-quality Aluminium Transformer Lugs with 4 Holes by Conex, ensuring reliable and stable electrical connections for transformer and power distribution systems.
At Conex Aluminium Components, we manufacture **Aluminium Transformer Lugs with 4 Holes** designed for high-performance electrical connections in transformers and power distribution systems. These lugs are crafted from premium-grade aluminium, ensuring excellent conductivity, lightweight durability, and corrosion resistance. The four-hole design enhances mechanical stability and provides a secure fit for demanding applications. Easy to install and available in a range of sizes, our transformer lugs are suitable for industrial, commercial, and utility projects. Conex also offers customization options to meet specific requirements, guaranteeing superior performance and long-lasting reliability.
Four-hole lugs have a large palm with four NEMA-spaced holes. They connect large aluminium conductors to transformer spades, switchgear or busbars with high contact area and anti-rotation.
NEMA standard four-hole lugs have 1-3/4 in (44.5 mm) centres in both directions with 9/16 in holes for 1/2 in bolts. IEC and custom spacings are available.
Typically 250 kcmil to 1000 kcmil (about 120–500 mm²) aluminium conductors, where large current and mechanical support are required.
Four bolts distribute clamping load and increase contact area, reducing contact resistance and preventing lug rotation on transformer spades.
Transformer lugs are typically tested to UL 486A-486B and ANSI C119.4, with NEMA dimensions per IEEE C57.12.34.
Tin plating is recommended for connections to copper or tin-plated spades and in corrosive environments.
Both are available. Compression lugs are crimped onto the conductor, while mechanical lugs use set screws or bolts.
Use 1/2 in or M12 stainless or galvanized bolts with Belleville washers to maintain contact pressure through thermal cycling.
Long-barrel four-hole lugs typically require two to four crimps depending on size, as specified on the lug.
Palm thickness is typically 6–10 mm depending on size and current rating, ensuring stiffness and low resistance.
Yes. They are widely used on busbars in switchgear and panels.
Testing includes pull-out, electrical resistance, heat-cycle and dimensional inspection as required by the applicable standard.
Yes. Custom palm sizes, hole spacing and barrel lengths can be produced to drawing.
Samples are typically available in 2–3 weeks and production in 4–6 weeks.
Please provide conductor size, hole spacing and size, plating, standard and quantity.
Need Aluminium Transformer Lugs 4 Holes? Get a Fast, Detailed Quotation
Send your drawing (STEP, IGES, DWG, DXF or PDF) with material grade, finish and quantity. Our engineers reply with a DFM review, price and lead time. MOQ 10 pcs • ISO 9001:2015 • Exports to USA, UK, Europe, Canada & Australia.
