Requirements for Installing Suspension Insulators
Release Date:
2025-08-18
Suspended string: Spring pins, bolts, and through pins should be inserted from the power receiving side, with the center line inserted from left to right (facing the power receiving side), and the side lines inserted from inside to outside.
The requirements for installing suspension insulators mainly include the following aspects:
Installation direction requirements
Suspended string: Spring pins, bolts, and through pins should be inserted from the receiving side, with the center line inserted from left to right (facing the receiving side), and the two side lines inserted from inside to outside.
Tension string: Spring pins, bolts, and through pins should be inserted from top to bottom; if difficult, they can be inserted from inside to outside or from left to right.
Installation quality requirements
The insulator string should be vertical to the ground; in individual cases, the tilt along the line direction should not exceed 5°, and the maximum deviation should not exceed 200mm.
Before installation, surface dirt should be cleaned one by one, and the gap between the bowl head, ball head, and spring pin should be checked to ensure the ball head does not come out of the bowl head.
Special scenario requirements
When replacing the contact network, the leakage distance of segmented insulator strings should generally be no less than 1200mm in normal areas and no less than 1600mm in polluted areas; the leakage distance should be increased when the altitude exceeds 1000m.
Pollution-resistant insulators need to determine the optimal usage range based on the umbrella structure (bell-shaped or double-layer umbrella type) and verify it through trial operation.
Other precautions
Before installation, the appearance of each insulator and the condition of metal fittings should be checked one by one to ensure no cracks, dirt, or abnormal metal accessories.
After unloading the insulator string, spring pins and pins should be replaced in time to avoid loosening or falling off.
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