Understanding Parallel Groove (PG) Clamps

Overview:

PG clamp, also known as a parallel groove clamp, is a specialized tool used predominantly in power transmission lines to secure conductors in parallel alignment.

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The bolted type PG clamp is an essential component used to join small to medium cross-section aluminum stranded wires or steel-core aluminum stranded wires. Additionally, these clamps connect steel stranded wires of overhead lightning protection lines where no tension is present, proving invaluable in jumper connections on non-linear poles.

Constructed from robust aluminum alloy and utilizing a plate-to-plate structure, the bolted type parallel groove clamp functions by the fastening pressure applied by bolts. This ensures the wires are securely held within the upper and lower grooves of the clamping plates. The pressure is distributed evenly and consistently via flat washers and spring washers. Post-installation, the clamp is detachable, making it particularly useful for jumper or ground wire splicing at strain points. Typically, a dual-bolt or triple-bolt configuration is employed, requiring uniform pressure during bolt tightening. In some cases, to ensure operational reliability, installing multiple clamps at equal intervals along the line is practiced. The holding strength of a bolted PG clamp ranges between 10%-20% of the wire’s calculated breaking force.

Bolted type PG clamps are vital for connecting small to medium cross-section aluminum stranded wires or steel-core aluminum stranded wires at non-tensioned points on overhead protection lines. They also serve in jumper connections on non-linear poles, essential for power engineering projects.

The clamps' construction involves a robust aluminum alloy and a plate-to-plate system, ensuring the wires are firmly secured through bolt-applied pressure. The design ensures even pressure distribution across the connecting wires through flat and spring washers. These clamps are removable after installation, making them ideal for jumper or ground wire joints at strain points. Typically featuring two or three bolts, their installation necessitates even force application. To boost reliability during power line constructions, it is common to position multiple clamps in parallel at regular intervals. The bolt-holding capacity of a PG clamp generally ranges from 10%-20% of the wire’s breaking capacity.

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What are the typical applications of PG clamps in power lines?

PG clamps are primarily used for securing parallel conductors in overhead power lines. They connect small to medium aluminum stranded wires and steel-core aluminum stranded wires, ensuring steady and reliable connections.

What are the advantages of using bolted type PG clamps?

Bolted PG clamps offer uniform pressure distribution, can be easily detached post-installation, and ensure reliable connections at strain points. Their aluminum alloy construction provides durability and ease of installation.

How do I ensure the right clamp for my power line project?

Choosing the right PG clamp involves considering the wire type, cross-section, and specific application needs. Consulting with providers can help in selecting the appropriate clamps that meet safety and performance standards.