Long rod polymer insulators manufactured by Xiangyang Guowang Xiangyang Guowang Composite Insulators Co., Ltd., who is one of the top insulators manufacturer in China. The company was established in 1997, and covers an area of more than 37,000 square meters. The enterprise has a production capacity of 1 million pcs of long rod polymer insulators per year.
The composite insulators designed, manufactured and tested according to IEC 61109 standard, with end-fittings according to IEC 61466-1, galvanized metal ends.
The insulators must comply with the requirements stipulated in the latest edition of the following standards, when applicable:
ANSI C29.11 Tests for composite suspension insulators for overhead transmission linesANSI C29.12 Composites suspension typesANSI/IEEE 4 Techniques for high-voltage testing
ASTM A153 Zinc coating (hot-dip) on iron and steel hardwareASTM A239 Test method for locating the thinnest spot in a zinc (galvanized) coating on iron or steel articles by the Preece test (copper sulfate dip)
IEC60060-2 High voltage test techniquesIEC61109 Insulators for overhead lines - Composite suspension and tension insulators for ac systems with a nominal voltage greater than 1 000 V - Definitions, test methods and acceptance criteria •IEC61109 - Amendment 1IEC60587 Electrical insulating materials used under severe ambient conditions – Test methods for evaluating resistance to tracking and erosionIEC61466-1 Composite string insulator units for overhead lines with a nominal voltage greater than 1000 V - Part 1: Standard strength classes and end fittingsIEC61284 Overhead lines - Requirements and tests for fittingsIEC60437 Radio interference test on high-voltage insulatorsIEC 36-Sec. 71 Tests of composite insulators for ac overhead lines with a nominal voltage greater than 1000 V
Composite insulators have characteristics and composition similar to those established in clause 3 of standard IEC-61109. The raw material for the insulation material (cover and core and fins) is 100% silicone rubber polymer (Silicon Rubber) before the process of adding additives. The finished product will not contain more than 20% carbon by weight. Usually the long rod polymer insulators are made of polymer housing, ECR fiber glass rod, metal end fittings, corona rings etc.
