Machines and devices to perform electrical tests and mechanical tests on electrical insulators,cables and fittings
Combined Electrical & Mechanical Test is an important test on high voltage porcelain disc insulators. In ANSI and IEC requirements, the disc insulator is mounted in a tensile testing machine with both ends connected. On the both ends, there is a voltage applied. This artical is embedded with a video of Combined Electrical & Mechanical […]
The existing IEC doesn’t succficiently reveal the potential adhesion problems in polymeric line insulators.
Insulators are important items in electrical power lines, they are widely used in all circuits and electrical or electronic systems to isolate electricity between two conductive materials. What we talk about today are polymer insulators and porcelain insulators applied on high voltage overhead lines. What’s the difference between polymer insulators and porcelain insulators? First of […]
The definitions of insulators here refer to the circumscription of the electrical insulators on overhead power lines or high voltage power substations in standard IEC 60383-1:1993. Why should we clarify the definitions of insulators? Because in IEC 60383 standard, it describes each test, whether a mechanical or electrical test, that should be carried out. And […]
What is HIPOT test? A Hipot test is a test for insulation. Its full name is high potential test, which actually means dielectric withstand test. Why should we do the hipot test? Hipot test is an important test, it helps users to identify the peek withstand value of insulation, and discrepancy of insulation material. In […]
The thermal-mechanical test is one of the most significant tests for composite insulators. Here we have a partial section of International Standard IEC 61109 2008: Insulators for overhead lines – Composite suspension and tension insulators for a.c. systems with a nominal voltage greater than 1 000 V – Definitions, test methods, and acceptance criteria. IEC […]
Polymer insulators are important electrical items in electrical power overhead transmission, distribution, and substation lines. They provide reliable insulation between cables and iron towers, or between conductors and connecting fittings like clamps so that the electricity can be transmitted safely. With the global growth of the electrical industry, more and more people smell the potential […]
Composite insulator’s shed and sheath are be made of high temperature vulcanizing (HTV) type silicone rubber, having silicone polymer content by weight 30% minimum. Alumina Trihydrate (ATH) is used as a filler. The filler is properly mixed with silicone compounds to ensure uniform distribution. The thickness of the sheath shall be a minimum of 3 […]
International standard IEC 61284:1997 “Overhead lines – Requirements and tests for fittings” has defined requirements and test methods of electrical fittings (line hardware) for overhead lines. The complete IEC standard includes English and French language version, it’s too long and a little difficult for quick explore. Here we quote the content of IEC 61284 for […]
Last time we talked about sample test of silicone composite insulator for AC system above 1KV, the IEC 61109:2008 has defined it clearly. Today let’s the coming section”routine test” of polymeric insulator in this IEC 61109: 13 Routine tests 13.1 Mechanical routine test Every insulator shall withstand, at ambient temperature, a tensile load at RTL […]