Devices mounted between condu ©Ω₹ctors or conductors of different potε↕×αentials and grounded c←σomponents that are ca₹↔αpable of withstanding voltage and mecha♠'nical stress. Insulators co≥γme in a wide variety of shapes. Altho☆"ugh the structure and appearance×× of different types of in≈•™✔sulators are quite different, thγ€÷ey are composed of two parts:∑€∑≠ insulating parts and connection hard♥‍<ware.

Insulators are specia®✘l insulation controls that can↑≠☆ play an important rolε↕✘e in overhead transmission li©₩₽nes. In the early years, iσ>nsulators were mostlyφ¥ used for utility poles, and sl∏≠•​owly developed at the end of★<♦ high-voltage high-vol©φtage electric wire connection $π↓towers where a lot of disc-shaped$±∑Ω insulators were hung. This is to‍ > increase the creepage distance•"δ€. Usually made of glass or cerami≈​cs, they are called insulator∞®‌s. Insulators should not fai ‍l due to various electromechanical≤ ↔← stresses caused by changes ★$in the environment and electric™↕♦₽al load conditions, otherwis>© ↔e the insulators will ₹ not have a significant effec$​±×t and will impair the use≤‌ and operating life o≈×€f the entire line.

Insulator function and requirements★‌£✘

The main function of insulators✔∏ ® is to achieve electr→ ical insulation and mechanical fixat ↓φion. For this purpose, various e™β™¶lectrical and mechanical performa♣€∏nce requirements are specified. Und★ er the action of the specifφ≤ied operating voltage, l₩Ω​ightning overvoltage a≈↕φ↔nd internal overvolt↕$age, no breakdown or fλ∏ βlashover along the surface occurs; un★ ←der the specified long-term®₹ and short-term mechanical load, no ↑↕× damage and damage will o✔∑ccur; in the specified m♦≈‍$achine After the long-termβλ operation under the elec≈←λtric load and various envi≠←ronmental conditions, no signific✘₹$<ant deterioration occurs; the fittings∏ © of the insulator do not produce obvi☆&<>ous corona discharge under the operat→♠‍‌ing voltage, so as not to ® interfere with the radio✘™ or television reception. Because insu× π$lators are widely used dev≠¥★γices, they are also required to be i★$↔nterchangeable. In addition, tδ±×he technical standards of insulators £≠∞also require variousπγ electrical, mechanical, ph™¶™≤ysical, and environmental conditioβγnal changes to test the‍<≥ performance and quality of i±π∞βnsulators, depending on the ↕≠type and conditions of use.