The JGH series aluminum alloy helical clamp is a high-performance cable fixing device designed for single-core high-voltage cables in power transmission and distribution. Its helical structure allows controlled axial movement of the cable under thermal expansion and contraction, while the non-magnetic aluminum alloy body eliminates eddy-current heating — a critical advantage over steel clamps for single-core HV cable circuits.

Key Features

• Non-Magnetic Aluminum Alloy — No eddy-current loss or induced heating around single-core cables, reducing energy waste and thermal aging of cable insulation.
• Helical Movement Design — The spiral clamping structure permits controlled longitudinal displacement, absorbing thermal expansion and mechanical vibration without loosening.
• Spring-Buffered Clamping — Integrated spring maintains consistent pressure across temperature cycles, preventing both over-clamping and cable slippage.
• Anti-Slip Rubber Liner — EPDM rubber liner protects the cable outer sheath from mechanical damage and dampens vibration.
• Corrosion Resistant — Aluminum alloy with surface passivation resists moisture, salt spray and chemical corrosion in cable tunnels and industrial environments.
• Easy Installation — Two-piece bolted design fits standard brackets and cable ladders; no special tooling required.

Specifications

• Material: Non-magnetic aluminum alloy + EPDM rubber liner
• Voltage class: 10kV–110kV single-core cables
• Cable diameter range: Φ50mm–Φ160mm (multiple models)
• Mounting: Cable trench bracket, tunnel wall, substation cable rack

Applications High-voltage cable trenches and tunnels; substation cable layers and outgoing lines; underground utility corridors; industrial and mining power cable fixing.

Custom sizes, bracket configurations and material upgrades are available. Contact us for selection data.