Isolante per la tensione di Guy
Guy strain insulators are specialized components designed to electrically isolate guy wires in overhead power transmission systems. These insulators, also known as guy wire insulators, are typically made of fiberglass or porcelain and feature a rod-like structure with end fittings such as clevis, Y clevis, or thimble eye. Guy strain insulators come in various types, including fiberglass and porcelain models, with different voltage ratings and lengths to suit diverse applications.
The primary function of guy strain insulators is to prevent electrical current from flowing through guy wires, ensuring safety for maintenance crews and the public. When installing guy strain insulators, they are inserted between two sections of guy wire or between the guy wire and the support structure. Guy strain insulators are commonly used with down guys, pole-to-pole guys, and anchor guys in overhead power line systems, providing both electrical isolation and mechanical support.
Key features of guy strain insulators:
• High dielectric strength to withstand electrical stress
• UV-resistant construction for outdoor durability
• Variety of end fitting options for versatile installation
• Available in multiple lengths and voltage ratings
• Superior mechanical strength to handle tensile loads
• Lightweight design for easy transportation and installation
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Guy Strain Insulator Drawing
| Minimum Ultimate Strength Rating: 16,000 libbre. E 21,000 libbre. | ||
| Numero di catalogo | “l” Rod Length (in.) | “X” Pin to Pin (in.) |
| GSI16-12CC | 12 | 2020/3/4 |
| GSI16-18CC | 18 | 2026/3/4 |
| GSI16-24CC | 24 | 1932/3/4 |
| GSI16-36CC | 36 | 1944/3/4 |
| GSI16-42CC | 42 | 1950/3/4 |
| GSI16-54CC | 54 | 1962/3/4 |
| GSI16-78CC | 78 | 1986/3/4 |
| GSI16-96CC | 96 | 104-3/4 |
| GSI16-120CC | 120 | 128-3/4 |
| GSI16-144CC | 144 | 152-3/4 |
| GSI21-12CC | 12 | 2020/3/4 |
| GSI21-18CC | 18 | 2026/3/4 |
| GSI21-24CC | 24 | 1932/3/4 |
| GSI21-36CC | 36 | 1944/3/4 |
| GSI21-42CC | 42 | 1950/3/4 |
| GSI21-54CC | 54 | 1962/3/4 |
| GSI21-78CC | 78 | 1986/3/4 |
| GSI21-96CC | 96 | 104-3/4 |
| GSI21-120CC | 120 | 128-3/4 |
| GSI21-144CC | 144 | 152-3/4 |
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What is the primary function of a guy strain insulator?
Guy strain insulators provide electrical separation between the pole and guy wire, preventing current flow through guy wires. They are installed in guy cables running from pole to ground or between poles, ensuring safety for maintenance crews and public during normal operations.
What materials and construction features are used in guy strain insulators?
Guy strain insulators are made of veiled fiberglass rod with metal end fittings. The fiberglass core provides insulation while being UV-resistant, and the end fittings are typically made of hot-dip galvanized ductile iron for durability and strength.
What strength ratings are available for guy strain insulators?
Guy strain insulators come in various strength ratings including 15,000, 21,000, 30,000, 36,000, 50,000, E 80,000 libbre. The selection depends on the specific application requirements and load conditions of the power line system.
How are guy strain insulators protected from environmental factors?
These insulators feature UV protection through veil or silicone coatings. They are designed to withstand temperature variations, umidità, and mechanical loading. For harsh environments, additional silicone coating options are available.
What are the typical installation configurations?
Guy strain insulators can be installed with various end fitting combinations including clevis/clevis, clevis with roller, clevis/thimble-eye, and Y-clevis configurations. Multiple insulators may be linked together to meet specific clearance requirements.
What electrical ratings should be considered when selecting guy strain insulators?
The electrical withstand ratings vary by length – longer insulators provide higher insulation. Per esempio, a 12-inch insulator typically provides 90kV dry and 45kV wet withstand, while a 144-inch unit can withstand 1080kV dry and 540kV wet.