Line post composite insulators for AC overhead lines with a nominal voltage higher than 1000V - Definition, test methods, and acceptance criteria 1 Scope and purpose This standard applies to line post composite insulators, which consist of cylindrical insulation core rods, outer sleeves, and end accessories. The core rod bears the load and is made of resin impregnated glass fiber. The outer sleeve is made of elastic material (such as silicone rubber or ethylene propylene rubber), and the end attachment is permanently fixed to the insulator core rod. The line post composite insulator described in this standard is used to support the line conductor and withstand bending, stretching, and compression loads. Suitable for AC overhead lines with a nominal voltage above 1000 V and a frequency not exceeding 100 Hz. The purpose of this standard is: - to define the terms used; - to specify test methods; - to specify acceptance or non conformance criteria. This standard does not include requirements for the selection of insulators under special operating conditions. 2 Normative References: The clauses in the following documents become clauses of this standard through reference in this standard. For dated references, All subsequent amendments (excluding corrected content) or revisions are not applicable to this standard. However, parties who have reached agreements based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version is applicable to this standard. GB/T 531-1999 Rubber Pocket Hardness Tester Hardness Test Method (idt 1SO 7619:1986) GB/T 1001.1-2003 Insulators for overhead lines with a nominal voltage above 1000 V - Part 1: Definitions, test methods, and judgment criteria for ceramic or glass insulator units used in AC systems (IEC 60383-1:1993, MOD) - GB/T 3505-2000 Geometrical product specifications, surface structure - Profile method: Terminology of surface structure Definition and parameters (eqvISO 4287:1997) GB/T 5169.16-2002 Fire hazard testing for electrical and electronic products: Part 16: 50W horizontal and vertical flame test methods (IEC 60695-11-10:1999, IDT)
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