Pin and suspension type insulator can be divided into porcelain insulator and polymer insulator used for transmission and distribution overhead power lines. The scope of this technical paper is to discuss about construction, types, designing, testing, and selection of polymeric high voltage insulators. These insulators can be used in any application that. String efficiency of suspension insulator when the voltage is applied across the suspension insulator string, it is unequally distributed across the individual unit. Porcelain, horizontal strut type insulator single strut section. Suspension insulators are cheaper in cost compared to pin type insulators for operating voltage above 50kv.
We manufacturer porcelain pin type insulator and composite pin insulators. The solution is to use insulator units with different. 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. 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. The capacitance between the links and the earth is 0,2 c, where c is the capacitance of an insulator determine the potential distribution along the insulators strain. Pin type insulator can be one part, two parts or three parts type, depending upon application voltage. So, this is insulator string, it is insulator string only and it is coming like this. Find suspension insulator stock images in hd and millions of other royaltyfree stock photos, illustrations and vectors in the shutterstock collection. The st suspension type classification system was born out of a simple need.
Orient power is pin insulator manufacturer in china. The production process of the rodurflex insulators starts with the extraction of the frp rod. Porcelain type bushings bushings transformer insulation. This zinc sleeve is strongly recommended for insulators which are going to be used in lines with heavy pollution. How many type of insulator use in electrical transmission. Suspension insulators transmission line composite insulator. Suspension insulators components verescence insulators. There are several types of insulators but the most commonly used are pin type, suspension type, strain insulator and shackle insulator. Ppc insulators offers the widest range of highquality transmission and. As the name suggests, the pin type insulator is secured to the crossarm on the pole.
Pin insulators are one of three types of overhead insulators, the others being strain insulators and suspension insulators. At lower utilization voltage the insulation also completely covers the live conductor and acts as a barrier and keeps the live conductors unreachable from human being or animals. When our customers think of trouble free transmission insulators with the longevity to outpace life time expectations of the. Pin insulator as the name suggests, the pin type insulator is mounted on a pin on the. We assign numbers starting first on smallest to largest.
Porcelain pin type insulator is made by ceramic material and brown or grey. Tr number lapp newell ngk locke 1750 202 315202 231001 ps00910 1751 205 315205 231002 ps01110 1752 208 315208. Insulations are defined as those materials or combinations of materials which retard the flow of heat energy by performing one or more of the following functions. Dimension not specifying tolerance are only reference. Manufactured of a top quality, uv resistant black plastic, the ltype rod insulator is one of our most popular insulators. A pin insulator is a device that isolates a wire from a physical support such as a pin on a. The purpose of the insulator or insulation is to insulate the electrically charged part of any equipment or machine from another charged part or uncharged metal part. Polymer, 230 kv, polymer, suspension type insulator with ansi c29. The effect of stray capacitance over voltage distribution using kcl at each node it can be found that. Types of insulators according to insulator material.
Solved calculation of string efficiency for suspension. Ansi 523, ansi 525 suspension insulaotr is the most common type of disc suspension insulator. Ssen 60372 locking devices for ball and socket couplings of string insulator units. The versatile neck designs in c, f, k and j, side and top grooves, allow the acceptance of largediameter. Type advanced rubber products hl, vl shed profiles for. Suspension insulator article about suspension insulator. Enml10229 polymer insulators catalog preformed line products. Pin and suspension type insulator are belonging to electrical. Control surface temperatures for personnel protection and comfort.
If a protective corona ring inserts capacitances from the line, with the link of the middle. A wide variety of suspension insulator options are available to you, such as application, type. The conductor is crimped to a joint which is fixed to the tension insulator in either side. The conductor passes through this groove and is bound by the annealed wire of the same material as the conductor. Disc insulators with extended creepage distances shall have measurements in. What is the difference between pin type, suspension type. O plus c condenser bushing instructions english pdf instruction type o plus c ii ehv drawrod installation guide english pdf instruction instructions for installation of draw rod bushings 115kv and above w glass bowl sight glass english pdf. Thousands of new, highquality pictures added every day. What is the difference between bushing and insulators. Voltage distribution in a suspension insulator strain. Advantages of suspension insulators and pin type insulators. Hv transmission line polymer suspension insulators 230kv.
It consists the number of porcelain insulator units connected with each other by metal links to form a flexible string. Insulators for direct current lines are always supplied with this. 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. Full selection of suspension coil spring insulators at. Difference between pin and suspension type insulator has many, such as insulator application, insulator voltage and insulator advantages. There is a groove on the upper end of the insulator. The suspension insulator separates the line conductors and supports them electrically. Orientsuspension type insulators,polymer suspension insulator. As one of suspension type insulators for overhead lines, polymer suspension insulator with the voltage ranging from 10kv to 36kv are mainly used in high voltage distribution line.
General recommendations of corona shield ring application are noted in the table below. Suspension and post type insulators for electric power overhead lines general use information. Today these composite insulators made of highgrade synthetic materials have exhibited outstanding mechanical and electrical characteristics,and have exceeded all overhead line and switchgear engineering applications in more than 50 countries worldwide. Suspension and post type insulators for electric power. Suspension insulators transmission line is for high voltage, extra high voltage and ultra high voltage used in suspension insulator string or strain type strings suspension type insulators are used to transmit. Difference between pin and suspension type insulator. These are made of porcelain, and design according to ansi. An electrical insulator is a material whose internal electric charges do not flow freely, and which therefore does not conduct an electric.
Transmission line insulators, porcelain, post horizontal strut description. Artificial rain test of outdoor long rod insulators pdf download available. American national standard for wetprocess porcelain. Ansi 523,525 suspension insulatororient insulator china. Orient power is a manufacturer of ceramic insulator porcelain insulator and supplies pin insulator, suspension insulator, line post insulator and other type insulators. For suspension type of insulators, the ratio of voltage across the whole string to the product of number of discs and the voltage across the disc nearest to the conductor is known as. Whether you need suspension insulators, tie top line post insulators, pin type and high. Cut to the correct length and visually inspected the rods are wrapped. Ppc insulators for the transmission and distribution of electricity. There is a groove on the upper end of the insulator for housing the conductor. Distribution insulator cross references distribution insulator cross reference chart click here for pdf version pin type insulators pin posts spools victor cat. An electrical insulator is a material whose internal electric charges do not flow freely.