Types of electrical insulators pdf, pin insulator pdfsenduo. Dulhunty power insulator section i type iec class xwp70 xwp100 xwp160 creepage distance, mm 400 400 450. There are 5 types of insulators used as electrical overhead insulation pin insulator, suspension insulator, strain insulator, stay insulator, and. 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. Both the spool insulators, as well as the guy strain insulators supplied by meister international are manufactured from wet process porcelain. There are several types of insulators but the most commonly used are pin type, suspension type, strain insulator and shackle insulator. 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. Fsk russian homologation lapp post ceramic 330750kv. Each unit or disc of suspension type insulator is designed for low voltage, usually 11 kv. Each insulator disc is designed to operate for 11kv. Our product range includes ceramic insulator, porcelain insulator, glass insulator, composite insulator, fuse cutout, surge arrester, power fittings, lamp holder, porcelain lampholder etc. Which type of insulator is used on 2 kv transmission lines.
This process allows the spool insulators and the guy strain insulators to shed water and keep dirt away, thus requiring littletono maintenance. Strain insulators ansi 541fuzhou senduo electric appliance. A pin insulator is a device that isolates a wire from a physical support such as a pin on a. The versatile neck designs in c, f, k and j, side and top grooves, allow the acceptance of. Distribution insulator cross references distribution insulator cross reference chart click here for pdf version pin type insulators pin posts spools victor cat. A wide variety of strain insulator options are available to you, such as application, type, and material. Artificial rain test of outdoor long rod insulators pdf download available. For help with porcelain strain insulator, 512 from ppc insulators.
A strain insulator may be inserted between two lengths of wire to isolate them. Dimensions and performance characteristics in accordance with as3609 electronics insulators guy strain porcelain, lv fibreglass, hv au 103. Our offer includes solutions in isolation and protective equipment for use, distribution and transmission of energy. Suspension type insulator being economical as compared to pin type insulator for high voltage overhead transmission line. Tongue type strain jacks clevis type strain jacks m19483 ratchet wrench c4000612 h19491. 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. Types of insulator ppt for school and college student.
The discs of strain insulatorsare used in the vertical plane. How many type of insulator use in electrical transmission. Jun 03, 2006 disctype insulators applied as a strain tension string. A wide variety of strain insulator options are available to you, such as application, type.
An insulator will be found in the following pages which will be correct for any pin type or strain installation. Tensile strain above 1% is found to enhance the resistivity by several orders of magnitude. Guy strain insulator guy strain insulators provide electrical separation from the pole to the guy wire. We are a leading manufacturer, exporter and supplier of power insulators. Disctype insulators applied as a strain tension string.
Strain type insulators however, for the high voltagetransmission lines, strain insulator consists ofan assembly of suspension insulators asshown in figure. Thread overall length a shank length l length p max. Mar 09, 20 for low voltage lines insulators are used as strain insulators. When there is a dead end of the line or there is corner or sharp curve, the line is subjected to greater tension. 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. Standard test method for tensile properties of plastics1. Technical article polymeric insulators submitted by. Hilite xl suspension insulators a e example d c f g b for example, if you want a suspension insulator with 83 mm 3. Therefore, this type of insulator is not economical beyond 33 kv. Suspension insulator3 strain insulator and4 shackle insulator.
Guy strain insulator archives maclean power systems. 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. A typical, stressstrain curve for a wire has a straight line segment, which in the. Download ansi 521 porcelain electrical insulators pdf. 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, strain insulator, shackle insulator and suspension type. A perfect insulator does not exist, but some materi. In case, when the tension is exceedingly high, two or more strings of insulator can be used in parallel. Transmission line design manual bureau of reclamation. Suspension type insulators are cheaper than pin type insulators for voltages beyond 33 kv. Lowvoltage eggtype strain insulator, used in utilitypole guy cables to prevent any. Distribution insulator cross re victor insulator company. They are used in overhead electrical wiring, to support radio antennas and overhead power lines. The versatile neck designs in c, f, k and j, side and top grooves, allow the acceptance of largediameter.
Strain and shackle type insulator mcqs with answers q1. 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. Our global team is ready to support you locally, providing you. Pdf a detailed investigation of overhead line insulators.
A pin insulator consists of a nonconducting material such asporcelain, glass, plastic, polymer, or wood. The successful operation of an overhead line depends to a considerable extent upon the proper selection of insulation. Strain type insulator insulator electricity electromagnetism scribd. 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. 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. The use of strain type insulators is made where the conductors are, options are. Pin, suspension, and strain insulators are used in medium to high. 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. For low voltage lines insulators are used as strain insulators. Insulators types of electrical insulators in overhead lines. There is a groove on the upper end of the insulator for housing the. All of which are manufactured under international standards such as iec and ansi among others. Covers strain type insulators made of wetprocess porcelain and used in the transmission and distribution of. Strain link stick roller link stick hiline utility.
Material used for insulator are following as below. Unlike the others, pin insulators are directly connected to the physical. 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. Types of insulators complete knowledge database of. Guy strain type porcelains are used in low and medium voltage lines. 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. Aug 24, 2011 there are several types of insulators but the most commonly used are pin type, suspension type, strain insulator and shackle insulator. 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. Indepth study and practical knowledge on this subject is. 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. Ppc insulators for the transmission and distribution of electricity.
Strain and shackle type insulator mcqs with answers. With over 50 years of manufacturing experience and performance testing, you can confidently specify newell. Single or multiple pin insulators can be used on one physical support, however, the number of insulators used depends upon the applications voltage. 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. For voltages up to 11 kv,shackle type insulator can be used. Pin insulators are the earliest developed overhead insulator, but are still commonly used in power networks up to 33 kv system. Number of sheds equals this number times four, plus any added sheds listed in the construction for example, if you want a suspension insulator. Ppc insulators 504, strain type, overhead products platt. Pin type insulators pin type insulator as the name suggests, the pin type insulator is secured to the crossarm on the pole. Standard test method for tensile properties of plastics1 this standard is issued under the. Suspension and strain insulator can be used in string, also called suspension insulator or strain insulator string. Gostr certificate for the full range of longrod porcelain lapp insulators gostr certificate for the full range of post ceramic lapp insulators s. Ansi class vi insulators victor porcelain products cooper lapp ohio brass santana a b chance 88r 552 253s np8d8 6188r 12847 pi 22081 c9052.
A strain insulator is an electrical insulator that is designed to work in mechanical tension strain. Orientwhat is the difference between pin type, suspension. 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. Depending upon the working voltage, the desired number of discs can be connected in series. But for high voltages, strain type insulators should be used. 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. 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.
Download insulator catalogue in pdf download lampholder catalogue in pdf home products porcelain insulators strain insulators strain insulator ansi 541. Insulators are generally classified in following types. It is a formed, single layer shape that is made out of a nonconducting material, usually porcelain or glass. As 3608 insulators porcelain and glass, pin and shackle type voltages. They are designed to work in mechanical tension strain, to withstand the pull of a suspended electrical wire or cable. 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. 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. For help with porcelain strain insulator, 412 from ppc insulators. What is the difference between pin type, suspension type and strain type insulator. Shop for insulators strain type from platt electric supply.
Covers strain type insulators made of wetprocess porcelain and used in the transmission and distribution of electric energy. 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. A number in parentheses indicates the year of last reapproval. In order to relieve the line of excessive tension, strain insulators are used. Disc insulators spool insulators pin type insulators strain. Types of insulators in transmission lines electrical4u. Electrical pylon with disc and pin type overhead line insulators source. Newell offers field proven performance in a complete line of solid core station post porcelain insulators. It is thought to be the earliest developed overhead insulator and is still popularly used in power. Pin insulators are one of three types of overhead insulators, the others being strain insulators and suspension insulators. Available in multiple lengths, strength ratings, and uv protection options.
The cost of pin type insulator increases rapidly as the working voltage is increased. Strain type insulators application for high voltage transmission lines, strain insulator consists of an assembly of suspension insulators. N this catalog are listed only pin type and strain insulators and accessory hardware. School of electrical engineering and telecommunications. What is the difference between pin type, suspension type. As the name suggests, the pin type insulator is secured to thecrossarm on the pole.