Introduction To The Core Components Of Bolt-type Tension Clamps

The bolted dead end clamp is a power fitting used for overhead transmission and distribution lines, primarily for securing aluminum stranded conductors or steel-reinforced aluminum stranded conductors on tension towers. It locks the conductor in place through the friction generated by tightening the clamp plates with U-bolts. It features easy installation and adjustable conductor sag, and is suitable for distribution networks with voltage levels of 10kV and below, or 35kV.
Core Introduction:
Material and Structure: Typically made of malleable cast iron or high-strength aluminum alloy. It consists of a clamp body, U-bolts, pressure plates, and pins. It features a large arc diameter design for smooth bending of the conductor and has a flared opening to reduce mechanical damage to the conductor.
Installation and Application:
Suitable for securing aluminum stranded conductors, steel-reinforced aluminum stranded conductors, and overhead insulated conductors on tension towers.
When used with insulated conductors, the insulation layer needs to be stripped, and it is often used with an insulation cover for protection.
Main Advantages:
Easy Installation: No special tools are required; on-site bolt tightening is sufficient.
Strong Applicability: Multiple U-bolts provide a large locking force.
Adjustable: Facilitates adjustment of conductor sag during tensioning.
Common Models:
NLD series: Malleable cast iron material, good vibration damping performance.
NLL series: Aluminum alloy material, more suitable for insulated conductors.
Overall, the bolted type strain clamp is an indispensable type of power fitting in distribution lines due to its simple installation, convenient maintenance, and good seismic performance.