For help with porcelain strain insulator, 512 from ppc insulators. Strain link stick roller link stick hiline utility. Suspension and strain insulator can be used in string, also called suspension insulator or strain insulator string. Lowvoltage eggtype strain insulator, used in utilitypole guy cables to prevent any. Jun 03, 2006 disctype insulators applied as a strain tension string. There is a groove on the upper end of the insulator for housing the.
Our global team is ready to support you locally, providing you. Made up of porcelain it has two holes for the stay wires and the design is such that in case of insulator breakdown, stay wire will not fall on the ground. What is the difference between pin type, suspension type and strain type insulator. Types of insulators complete knowledge database of. The use of strain type insulators is made where the conductors are, options are. Both the spool insulators, as well as the guy strain insulators supplied by meister international are manufactured from wet process porcelain. Distribution insulator cross references distribution insulator cross reference chart click here for pdf version pin type insulators pin posts spools victor cat. A pin insulator is a device that isolates a wire from a physical support such as a pin a wooden or metal dowel of about 3 cm diameter with screw threads on a telegraph or utility pole.
Strain type insulator insulator electricity electromagnetism scribd. A number in parentheses indicates the year of last reapproval. A wide variety of strain insulator options are available to you, such as application, type, and material. For low voltage lines insulators are used as strain insulators. Strain and shackle type insulator mcqs with answers q1. Pin type insulators pin type insulator as the name suggests, the pin type insulator is secured to the crossarm on the pole.
Thread overall length a shank length l length p max. Strain type insulators application for high voltage transmission lines, strain insulator consists of an assembly of suspension insulators. Strain type insulators when there is a dead end of the line or there is corner or sharp curve, the line is subjected to greater tension. The mechanical strength of a string is determined by the rating of the metal parts of a single unit, but the electrical rating can be increased by simply adding more units. Straintype insulator is generally used at line terminal and at dead end, at road crossings, in case of overhead lines with cables crossing the river and also at angle tower. As 3608 insulators porcelain and glass, pin and shackle type voltages. Depending upon the working voltage, the desired number of discs can be connected in series. Several older styles of high voltage strain insulators intended to deadend feeder wires were mounted vertically between two crossarms by means of a wooden or metal rod or pipe. N this catalog are listed only pin type and strain insulators and accessory hardware.
Tensile strain above 1% is found to enhance the resistivity by several orders of magnitude. The discs of strain insulatorsare used in the vertical plane. Guy strain insulator guy strain insulators provide electrical separation from the pole to the guy wire. Each unit or disc of suspension type insulator is designed for low voltage, usually 11 kv. Pin type insulator can be one part, two parts or three parts type, depending upon application voltage in a 11 kv system we generally use one part type insulator where whole pin insulator is one piece of properly shaped porcelain or glass. Ppc insulators for the transmission and distribution of electricity. There are several types of insulators but the most commonly used are pin type, strain insulator, shackle insulator and suspension type. You will see this new design of porcelain electrical insulators ansi 521 drawing with technical data, this new type ansi 521 is small than the old one in overall dimensions, but with same technical specifications, which design will save cost for user.
Guy strain type porcelains are used in low and medium voltage lines. Strain type insulators however, for the high voltagetransmission lines, strain insulator consists ofan assembly of suspension insulators asshown in figure. Mar 09, 20 for low voltage lines insulators are used as strain insulators. D insulators pin type insulators highly resistant to lightning puncture, ppc insulators manufactures a wide range of low and high voltage pin type insulators designed for distribution and sub transmission circuits. Distribution insulator cross re victor insulator company. Standard test method for tensile properties of plastics1. Guy strain insulator archives maclean power systems. Hilite xl suspension insulators a e example d c f g b for example, if you want a suspension insulator with 83 mm 3.
Gostr certificate for the full range of longrod porcelain lapp insulators gostr certificate for the full range of post ceramic lapp insulators s. An electrical insulator is a material whose internal electric charges do not flow freely, and which therefore does not conduct an electric current, under the influence of an electric field. Pin type, suspension type and strain type insulator are important insulators used for high voltage, medium voltage and low voltage lines and made of polymer, also belong to polymer insulators. Indepth study and practical knowledge on this subject is. Stay insulators are used on the wire to create insulation between pole and stay clamp. There are several types of insulators but the most commonly used are pin type, suspension type, strain insulator and shackle insulator. There are 5 types of insulators used as electrical overhead insulation pin insulator, suspension insulator, strain insulator, stay insulator, and. In case, when the tension is exceedingly high, two or more strings of insulator can be used in parallel. What is the difference between pin type, suspension type. With over 50 years of manufacturing experience and performance testing, you can confidently specify newell. All of which are manufactured under international standards such as iec and ansi among others. They are used in overhead electrical wiring, to support radio antennas and overhead power lines. Ansi class vi insulators victor porcelain products cooper lapp ohio brass santana a b chance 88r 552 253s np8d8 6188r 12847 pi 22081 c9052. Electrical pylon with disc and pin type overhead line insulators source.
The versatile neck designs in c, f, k and j, side and top grooves, allow the acceptance of. This process allows the spool insulators and the guy strain insulators to shed water and keep dirt away, thus requiring littletono maintenance. The successful operation of an overhead line depends to a considerable extent upon the proper selection of insulation. Disctype insulators applied as a strain tension string. Technical article polymeric insulators submitted by. Our offer includes solutions in isolation and protective equipment for use, distribution and transmission of energy. Our product range includes ceramic insulator, porcelain insulator, glass insulator, composite insulator, fuse cutout, surge arrester, power fittings, lamp holder, porcelain lampholder etc. How many type of insulator use in electrical transmission. As the name suggests, the pin type insulator is secured to thecrossarm on the pole. Contact us home about us porcelain hollow insulator porcelain station post insualtor porcelain line post insulator porcelain disc suspension insulator porcelain shacklereel, spool insulator porcelain strain stay insulator porcelain pin type insulator porcelain cutout insulator porcelain bushing other.
When there is a dead end of the line or there is corner or sharp curve, the line is subjected to greater tension. An insulator will be found in the following pages which will be correct for any pin type or strain installation. Pin insulators are the earliest developed overhead insulator, but are still commonly used in power networks up to 33 kv system. For high voltages 33 kv, it is a usual practice to use suspension type insulators consist of a number of porcelain discs connected in series by metal links in the form of a string. Artificial rain test of outdoor long rod insulators pdf download available. In order to relieve the line of excessive tension, strain insulators are used. A pin insulator consists of a nonconducting material such asporcelain, glass, plastic, polymer, or wood. Strain type insulator is generally used at line terminal and at dead end, at road crossings, in case of overhead lines with cables crossing the river and also at angle tower. Our product range includes ceramic insulator, porcelain insulator, glass insulator, composite insulator, fuse cutout, surge arrester, power. Orientwhat is the difference between pin type, suspension. Suspension type insulators are cheaper than pin type insulators for voltages beyond 33 kv. Covers strain type insulators made of wetprocess porcelain and used in the transmission and distribution of. Transmission line design manual bureau of reclamation.
Insulators are generally classified in following types. Types of electrical insulators pdf, pin insulator pdfsenduo. Available in multiple lengths, strength ratings, and uv protection options. A pin insulator is a device that isolates a wire from a physical support such as a pin on a. Strain insulators ansi 541fuzhou senduo electric appliance. Unlike the others, pin insulators are directly connected to the physical.
A perfect insulator does not exist, but some materi. For help with porcelain strain insulator, 412 from ppc insulators. Types of insulator ppt for school and college student. Tongue type strain jacks clevis type strain jacks m19483 ratchet wrench c4000612 h19491. Each insulator disc is designed to operate for 11kv. Strain and shackle type insulator mcqs with answers. A typical, stressstrain curve for a wire has a straight line segment, which in the. For voltages up to 11 kv,shackle type insulator can be used. Newell offers field proven performance in a complete line of solid core station post porcelain insulators. Suspension insulator3 strain insulator and4 shackle insulator. A strain insulator is an electrical insulator that is designed to work in mechanical tension strain, to withstand the pull of a suspended electrical wire or cable. Download ansi 521 porcelain electrical insulators pdf.
Covers strain type insulators made of wetprocess porcelain and used in the transmission and distribution of electric energy. Shop for insulators strain type from platt electric supply. Dulhunty power insulator section i type iec class xwp70 xwp100 xwp160 creepage distance, mm 400 400 450. It is thought to be the earliest developed overhead insulator and is still popularly used in power. Suspension type insulator being economical as compared to pin type insulator for high voltage overhead transmission line. A strain insulator is an electrical insulator that is designed to work in mechanical tension strain. Dimensions and performance characteristics in accordance with as3609 electronics insulators guy strain porcelain, lv fibreglass, hv au 103. Whether you need suspension insulators, tie top line post insulators, pin type and high voltage pin type insulators, or spool and guy strain insulators, you can. Complete uptominute specifications and characteristics are given. We are a leading manufacturer, exporter and supplier of power insulators. Whether you need suspension insulators, tie top line post insulators, pin type and high voltage pin type insulators, or spool and guy strain insulators, you can count on ppc insulators to have the widest range of. Pdf a detailed investigation of overhead line insulators. Therefore, this type of insulator is not economical beyond 33 kv. Pin insulators are one of three types of overhead insulators, the others being strain insulators and suspension insulators.
Standard test method for tensile properties of plastics1 this standard is issued under the. Which type of insulator is used on 2 kv transmission lines. A wide variety of strain insulator options are available to you, such as application, type. Fsk russian homologation lapp post ceramic 330750kv. In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to. Insulators types of electrical insulators in overhead lines. Types of insulators in transmission lines electrical4u. Ppc insulators 504, strain type, overhead products platt. A strain insulator may be inserted between two lengths of wire to isolate them. Pin, suspension, and strain insulators are used in medium to high. But for high voltages, strain type insulators should be used. Material used for insulator are following as below. Download insulator catalogue in pdf download lampholder catalogue in pdf home products porcelain insulators strain insulators strain insulator ansi 541.
They are designed to work in mechanical tension strain, to withstand the pull of a suspended electrical wire or cable. The versatile neck designs in c, f, k and j, side and top grooves, allow the acceptance of largediameter. An insulator or insulator unit in which the length of the shortest puncture path through solid insulating material is at least equal to half the arcing distance. Single or multiple pin insulators can be used on one physical support, however, the number of insulators used depends upon the applications voltage.
It is a formed, single layer shape that is made out of a nonconducting material, usually porcelain or glass. Disc insulators spool insulators pin type insulators strain. A dead ended, b at intermediate anchor towers, c any of the above, d none of the above, e, leave your comments or download question paper. Aug 24, 2011 there are several types of insulators but the most commonly used are pin type, suspension type, strain insulator and shackle insulator.
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