What type of insulator is commonly used for 11kV overhead lines?

2025-08-10

For 11kV overhead lines, the most common types of insulators are pin insulators and shackle insulators.

  • Pin insulators are widely used for straight-line supports where the conductor's load is light. They are secured directly to the cross-arm of the pole and are an economical and effective solution for voltages up to 33kV.

  • Shackle insulators are typically employed in low-voltage distribution lines, especially at the end of a line or at sharp corners where there is high mechanical tension. They can be mounted in both horizontal and vertical positions.

In some cases, a single suspension/disc insulator may also be used for 11kV lines, particularly when greater mechanical strength or flexibility is required. However, pin and shackle types are the most prevalent for this voltage level.

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