Composite Insulators
Composite InsulatorsSuspensions Line Posts Brace Posts Station Posts
Quality, reliability and consistencyfor over four decadesAs an alternative and complement to our range of provenceramic insulators, Lapp Insulators offers the Rodurflex advanced technology insulator system.Today these compositeinsulators made of high-grade synthetic materials have exhibitedoutstanding mechanical and electrical characteristics, and haveexceeded all overhead line and switchgear engineeringapplications in more than 50 countries worldwide.1965 Development of composite insulators begins with a twocomponent system consisting of a rod made of fiberglassreinforced plastics (FRP) encased in a silicone elastomerhousing.1967 Suspension class Rodurflex production begins.1974 Hydrolysis resistant resin system for a fiberglassreinforced resin rod is introduced.1979 High temperature vulcanized (HTV) silicone rubber isintroduced, improving the mechanical characteristics ofthe material.1979 Sheath thickness of the housing is increased to 3mm toreduce electrical field strength within the FRP rod andprovide better protection during handling and installation.1982 Metastable silicone sealing system is developed toprevent moisture ingress to the FRP rod.1983 Acid resistant glass fibers (ECR) are introduced to preventbrittle fracture of the FRP rod.1985 Compression type, forged steel end fittings are introducedto improve the system’s mechanical strength.2001 Lapp Insulators purchases Ph. Rosenthal & Company –the polymer insulator division of German-basedCeramTec AG – inventor of Rodurflex compositeinsulators, and a global leader in the production oflightweight silicone rubber polymer insulators.2005 Lapp Insulators begins domestic production of Rodurflex high voltage composite insulators capable of servicingNorth American utility companies from its Sandersville,Georgia international distribution center.
RodurflexInsulatorsare well-suitedwell-suited for:for:areHigh contaminationcontamination HighapplicationsapplicationsAreas wherewhere Areasvandalism isisvandalismproblemaa problemHigh creepagecreepage Highon aa shortshort lengthlengthonCompact lineline CompactapplicationsapplicationsKey Features Outstanding resistance toenvironmental factors such as UVlight, ozone, acid, contamination andmoisture. Reduced creepage requirtementsfor optimal performance whencompared to porcelain, due tohydrophobic properties. Interior tensile strength higher thansteel, despite weighing approximately75% LESS. Greater resistance to vandalism. Worldwide transmission systemapplications up to 765 kV. Reduced installation costs.No heavy lifting equipment required. High resistance to discharges andleakage currents. High explosion resistance of hollowinsulators in case of internalpressure build-up.20 24UPTOINCHESFEETThe Rodurflex design allowsfor infinitely variable sectionlengths & creepage distancesfor every product.Inside the Lapp Rodurflex System Water-repellent, UV and coronaresistant silicone rubber basepolymer housing. Metal fittings are fixed to the fiberglass core, not the silicone housingfor maximum mechanical strength. Pre-molded weathersheds arechemically bonded to the housing,eliminating mold-lines and allowingvariable creepage distances for afixed insulator length. Corona ring applied to the metalfittings to protect the housing. Housing is chemically bonded to thefiberglass core. Hydrolysis-resistant resin systemapplied to the fiberglass reinforcedresin rod. 3mm-thick high temperaturevulcanized (HTV) silicone rubbersheath improves the system’smechanical characteristics whilereducing FRP rod’s electric fieldstrength. Also protects the FRProd during handling and installation. Metastable silicone sealing systemprevents moisture ingress to theFRP rod.1
Lapp Rodurflex Catalog Numbering SystemSuspension InsulatorsSML(LBS)CS2
Socket:ANSI 52-5 Y-Clevis Clevis:ANSI 52-6 0.50 0.89 0.69 2.36 1.18 0.79.67 Tongue:ANSI 52-6 Ball:ANSI 52-5 Oval Eye Available End Fittings 1. All section lengths are based on Y-Clevis & Ball end fittings. 2. Electrical data shown for insulators without corona rings. Lapp recom
Product Types Vertical Clamp Top Line Post Insulators PPC Insulators offer vertical clamp top line post assemblies for ratings 15 kV through 45 kV. PPC vertical clamp top line post insulators are mounted upright on crossarms and structures. Rated at 2800 lb. cantilever strength these insulators offer strength with excellent mechanical as well as electrical characteristics. The one–piece .
At present the insulating glass has found a wide use for the purpose. Glass can be easily pressed and shaped to any form insulators. The production method of glass insulators is much easier than porcelain. Hence entire process can be completely automated. Besides the insulators for AC/DC transmission lines, the section covers insulators for
standard 957 clearly prescribes the procedures basically used for the cleaning of contaminated electrical insulators for all types ceramic porcelain glass and also the recent polymer or insulators and for equipment which are being used that is the bushings the hollow post insulators and so on.
Since, in contrast to porcelain and glass insulators, composite long rod insu-lators can be formed in one piece up to the highest of voltages, they only weigh a fraction of conventional insulators (at 400 kV they weigh approximately 10 % of a comparable porcelain long rod). Their use is therefore also favoured in special tower designs such as guyed
Types of composite: A) Based on curing mechanism: 1- Chemically activated composite 2- Light activated composite B) Based on size of filler particles: 1 - Conventional composite 2- Small particles composite 3-Micro filled composite 4- Hybrid composite 1- Chemically activated, composite resins: This is two - paste system:
Typically, composite line insulators have smaller average diameters than porcelain or glass insulators. As a result, an improved . without precautionary maintenance measures such as cleaning or greasing. Comparing Silicone Rubber with other polymeric materials as well as glass/porcelain as reference, the following principle
34222017LAPP Insulator Pin F-Neck, 15KV, 1" Thread 7061R-70 GAMMA INSULATORS CORP. 6 34224213LAPP Insulator Pin F-Neck, 15KV, 1" Thread 6183R-70 GAMMA INSULATORS CORP. 12 34224213HENDRIX Insulator Pin F-Neck, 15KV, 1" Thread HPI-55-4 HENDRIX 18 34231213LAPP Insulator Pin J-Neck, 15KV, 1-3/8" Thread 8248R-70 GAMMA INSULATORS
DC - Transmission line - Glass insulators - Insulator selection - Pollution - String design - Dimensioning - Insulators 1. INTRODUCTION String design and insulator selection for HVDC is an exercise which requires specific considerations given the particularity of the application. Insulators for DC lines are made with
