Efficiency In Overhead Lines: Installing A Bolt-type Tension Clamp Without Cutting Conductors
Maintaining continuous conductor flow during overhead line installation optimizes grid reliability. Bolt-type tension clamps can be used to fix the connection without cutting the main line. This non-cutting method preserves the mechanical integrity of the wire and drastically reduces installation time on site.
What is a Bolt-type tension clamp?
A bolted type strain clamp is a heavy-duty fitting designed to anchor overhead conductors under high tension. Unlike compression fittings, this dead end strain clamp uses high-strength bolts to apply a precise gripping force. This mechanical design permits seamless slip-on installation directly over intact wires.
Key Benefits of Non-Cutting Installation
Using a bolted dead end clamp without cutting the conductor offers measurable operational advantages:
-
Zero Electrical Resistance: Keeping the conductor whole eliminates spliced joints, preventing localized overheating points.
-
Time Savings: Installation takes under 20 minutes compared to traditional hydraulic crimping methods.
-
Lower Equipment Costs: Crews only require standard torque wrenches rather than expensive hydraulic presses.
Specification Comparison
The table below outlines standard performance metrics for these mechanical fittings across typical distribution sizes:
| Conductor Diameter Range (mm) | Holding Strength (% UTS) | Tightening Torque (N·m) |
|---|---|---|
| 6.0 - 14.0 | 95 | 45 |
| 14.1 - 22.0 | 95 | 70 |
| 22.1 - 32.0 | 95 | 90 |
Installation Guide
Phase 1: Preparation and Alignment
Position the continuous wire inside the open keeper piece of the dead end strain clamp. Ensure the conductor sits perfectly straight within the curved groove to guarantee uniform pressure distribution across the metal surface.
Phase 2: Secure the Fasteners
Gradually tighten the bolts on the bolted type strain clamp using a diagonal alternating pattern. Apply the exact torque specified in the engineering manual to prevent over-compression or wire deformation.
Phase 3: Final Inspection
Verify the visual alignment of the bolt-type tension clamp body. Check that the conductor extends smoothly past the bolted dead end clamp without sharp bends, ensuring long-term mechanical stability.
