{"id":7636,"date":"2025-10-28T03:26:18","date_gmt":"2025-10-28T03:26:18","guid":{"rendered":"https:\/\/www.raxpower.com\/?page_id=7636"},"modified":"2026-08-12T04:23:22","modified_gmt":"2026-08-12T04:23:22","slug":"isolateur-de-maintien","status":"publish","type":"page","link":"https:\/\/www.raxpower.com\/fr\/overhead-line-insulator\/standoff-insulator\/","title":{"rendered":"Isolateur d\u00e9port\u00e9"},"content":{"rendered":"
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Standoff Insulator<\/h2>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div>
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Standoff insulators support and secure busbars or other live electrical equipment while maintaining safe insulation distances. They prevent short circuits, flashovers, and electrical discharge in switchgear, transformers, and panelboards, engineered to withstand high mechanical and electrical stresses per UL, IEEE, IEC, and NEMA standards.<\/p>\n

These insulators are manufactured from UL-recognized fiberglass-reinforced thermoset polyester, polymeric composites, or high-temperature ceramic in ISO 9001:2015 compliant facilities. Each lot undergoes mechanical and electrical testing. Key advantages include flame retardancy with UL 94 V-0 rating, track resistance, and high arc resistance preventing surface-conducting paths under high voltage. They combine high mechanical strength with superior dielectric properties, offering greater moisture and heat tolerance than plastic alternatives.<\/p>\n

Voltage ratings range from 600V to 15kV with Basic Insulation Level (BIL) up to 250 kV. Heights span 1 to 6 inches, diameters from 1.13 to 4 inches, in hexagonal, round, or octagonal shapes. Threaded inserts are aluminum, steel, or brass with common sizes including 1\/4-20, 3\/8-16, M6, and M8, supporting torque up to 45 ft-lbs. Dielectric strengths reach 40 kV with arc resistance times of 180 seconds.<\/p>\n

Applications include indoor electrical panels, switchboard accessories, and bus bar supports isolating conductors from grounded structures. They serve power distribution, renewable energy, rail, marine, and data centers, with selection accounting for humidity, dirt, and compliance requirements like UL 891 Annex G.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div>