The pin type insulator has grooves on the upper end for keeping the conductor. Composite post insulator like most of composite insulators consists of a cylindrical solid insulating core made of resin impregnated fibres which bearing the mechanical load. Available in a bag of 25, these insulators for electric fencing fit standard 1. 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.
Suspension and post type insulators for electric power. Ppc insulators for the transmission and distribution of. Post insulators are also used in substations to insulate high voltage switching gear and transformers. The zareba yellow pinlock tpost insulator has a molded pin that holds the wire tightly. The easy spin on post nut screws on back of insulator tight to accommodate post size. In general, there are three types of suspension insulator. There are 5 types of insulators used as electrical overhead insulation pin insulator, suspension insulator, strain insulator, stay insulator, and. Poecelain line post insulator details of top and base tietop type fneck nneck 9 top and sidewire groove top wire groove shall a 11516 inch49. The red snapr economy round post insulator has a selfcentering post cavity with a spinon nut that fits round posts from 0.
We have experience with the manufacture of post insulators since 1930. Thread overall length a shank length l length p max. Types of wire conductors two or more conductors in a common covering form a cable. Electric fence is an online store that offers heavy duty vinyl, porcelain and corner insulators at an affordable price. Gray glaze is standard on all station post insulators. When you want to release the wire, just pull the pin. The load is being transmitted to the fibre glass core by metal end fittings.
New developed or promoted power products our company developed grey pin type and line post insulators used in american market and electrical power fittings used in african market. Socomec insulating busbar supports enable the fixing of copper or aluminium busbars and are tested. We have screwtight t post insulators, as well as t post insulators that snap on and around t posts. Comparative investigation of pollution accumulation and natural. The heavyduty flange holds the insulator securely to a 1. Our post insulators from the latest high performance ceramics have been in use for many decades in switchgear and capacitor bank platforms. They are used in overhead electrical wiring, to support radio antennas and overhead power lines.
The type and sample tests shall have been undertaken by a nata registered testing authority. You may now input as many curves of whatever shape you like with each curve having as many points as necessary to accurately describe the strength of the insulator. Cap and pin insulator is usually composed of a porcelain unit or a stack of two or more units, assembled with cap and pin on it, the metal cap will be assembled with. Artificial rain test of outdoor long rod insulators pdf download available. Overhead wiring string insulator set and ep 08 00 00 21 sp insulator type. What are the differences between an isolator and an insulator. Insulator in overhead line and types of insulators. Type type of insulators hmm dmm lmm a pin type 562 165 229 432 b pin post type56572 336 170 534 c line post type572 305 152 559. Type tests must have been carried out within the last ten 10 years. For arcing protections, it has two shields to prevent shorting. There is a groove on the upper end of the insulator for housing the conductor. Electrical isolators or disconnector or disconnect switch, separate a part of the system from rest i.
Cables typically consist of multiple conductors, colorcoded for identification. Therefore the strength factors in table 2771 are to be used under the weather conditions noted in. This paper presents a straightforward analysis of the electric field concentration concerning a distribution structure crossarm, n1 type, using pin type ceramic insulators, 15 kv. Electric fence insulators for wood posts, tposts, rodposts, and more. Polymer post insulator core is protected by outer housing made of silicone rubber. Types of insulators in transmission lines electrical4u. Class a insulators are considered to be unpuncturable. The linepost insulators are usually manufactured as onepiece solid. Pin type insulator can be one part, two parts or three parts type, depending upon application voltage.
For short circuit loads only, the maximum recommended working load is 100% of published ratings when using formulas from ansi c371972. Insulator electricity, a substance that resists electricity pin insulator, a device that isolates a wire from a physical support such as a pin on a utility pole. The central top portion of the insulator consists of two curved tunnels. Pdf calculation of the electric field on an insulator. More than 30 years experience in power industry since 1978 as a composite insulator manufacturer in china, advanced manufacturing process, strict quality control test system, iso certificated, excellent communication, considerate services, enable us to be a leading composite insulator manufacturer of composite insulator and polymer 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. Our corner knob insulators come 10 to a bag in different styles. Cap and pin insulator tr4 is used on electrical apparatus and has the function of insulating and support. Surface marks on insulator shed material usually caused during the manufacturing process. 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. Rules 250, 251, and 252 do not specify load factors.
Technical specification for composite line post insulators. Use with smooth wire, coated wire, polywire, polytape, twine, rope, or braid. Post type insulators are usually used in substations. Prior to this version, the curve was limited to being a single rectangle. Assuming that you are referring to insulator and isolator in electrical terminology. In the recent years, america and africa develop more transmission lines and have a quantity requirement of insulators and power fittings. Preparing reports and construction documents showing all construction. Polymer station post characteristics 110kv to 350kv bil catalog number 2334603001 2326863001 2326853001 2331923001 2331873001 bil kv 110 150 200 250 350 technical reference equivalent 205 208 210 214 216 height inches mm 10 254 14 356 18 457 22 559 30 762 leakage distance in mm 17. A pin insulator is a device that isolates a wire from a physical support such as a pin on a. Profiles of test insulators a pin type insulator b pin post insulator and c line post insulator. In the event a te insulator from this range is found to demonstrate manufacturing defects, te. Orientcatalogue for porcelain station post insulators.
Orient power is a post insulator manufacturer and supplies all types of post insulators, such as iec series solid core station post insulators, tr series porcelain station post insulators, standoff post type insulators, composite station post insulators and post insulator for switch or electric apparatus as per ansi, bs, iec, etc. Pin insulators are one of three types of overhead insulators, the others being strain insulators and suspension insulators. Pin type insulators as the name suggests, the pin type insulator is secured to the cross arm on the pole. Type, sample and routine tests shall be in accordance with the relevant sections of as 4398. A wide variety of fence insulators are available for you online. A strain insulator may be inserted between two lengths of wire to isolate them electrically from each other while maintaining a. The versatile neck designs in c, f, k and j, side and top grooves, accepts large diameter conductors for easy tying. Posttype insulators the post insulators are used on distribution, substation, and transmission lines and are installed on. Proper allowance should be made for the loads in rule 250c and rule 250d.
Orientcomposite post insulator,polymer post insulator. The pin insulator is used in power distribution for the voltage up to 33kv. Checking post insulators with multiple interaction curves. Ppc manufactures a wide range of low and high voltage pin type insulators designed for distribution. There are two types for this series, normal type and antipollution type. Technical specification for outdoor porcelain station post. Constant spacing between two conductors through the entire length of the cable provides a transmission line. The lapp insulator company originated the line post which quickly replaced the porcelain pin type insulator as the most popular for medium voltage transmission. Further optimized insulator designs have been developed by ppc with ultrahigh mechanical strength and maximum extended creepage distances it was not possible to manufacture such insulators using conventional porcelain production technology, but the isostatic technology enables such designs to be produced by ppc insulators. Strain insulator, a device that is designed to work in mechanical tension to withstand the pull of a suspended electrical wire or cable.
They withstand weights of double digit tons over several decades and thus ensure the safe transportation of energy and power supply across hundreds of miles. Cap and pin insulator is one type of wet process porcelain high voltage insulator and tr4 is a common type of it. Vertical line post 15 kv clamptop stud base 3410 tap. Many early multipart lines are spotted with line post insulators as replacements. The type of line post insulator used in south southafrica can be classified as capped line post insulator ep356, ep480, ep802 cap less line post insulator ep472, ep965, ep8 composite line post insulator types. Orient has many composite insulator types, you can find composite insulator pdf files and you can open and download compositeinsulator pdf. We have electric fence insulators in dozens of styles so you can get the farm fencing supplies you need for the kind of fence you are running. Electrical performances of line post insulators in 22kv.
Line post insulator specifications ain line post insulator specifications. This eliminates the need of pressure monitoring or gas filling devices. Should the tenderer be unable to provide type and sample test certificates from a nata. Technical specification for composite line post insulators page 4 of 22 specification ets100202 ver 4 ergon energy corporation limited abn 50 087 646 062 exceed 1 mm or 5% of the layer thickness of the blanket material in the area under consideration. Post insulators are used in areas with heavy pollution and risk of read more. Lapp insulators produces high quality products for high voltage and railway electricity networks since 1930. Research and further development resulted in the optimization of our post insulators for distribution plants and switchgear systems. The low pressure design is hermetically sealed to last the entire service life of the insulator with a patented redundant sealing system. Horizonal post insulator properties power line systems. American national standard for insulatorswet process porcelain and toughened glasstransmission suspension type. It is placed on the cross arm of the supporting tower. Lapp station post insulators are wellsuited to high voltage and ehv switch and bus construction because of their strength, rigidity and adaptability to a wide range of stack heights and bil ratings. The conductor passes through this groove and is bound by the annealed wire of the same material as the conductor.
Porcelain station post insulators ansi standard type characteristics cat. Individual protrusions on the insulator surface are allowed up to 2 mm as. Mechanical strength of insulators insulators shall withstand all applicable loads specified in rules 250, 251, and 252 except those of rule 250c and rule 250d without exceeding the following percentages of their strength rating for the respective insulator type shown in table 2771. It is one of the earliest designs, and consists of one porcelain disc. In electrical again, they can be classified based on thermal characteristics, mechanical characteristics, composition thermosets, thermoplastics, natural, synthetic, solid. Zareba electric fence yellow economy roundpost insulator. These insulators are constructed in the form of a cylinder. Ppc porcelain ceramic post insulators ppc insulators. These insulators exhibit high resistance to puncture. Download insulators catalogue pdf overhead line fittings uk ltd. Orientpost insulator manufacturer,station post insulator.