Isolated phase bus ducts ipb isolated phase busducts ipb with air insulation. Service approaches to maintenance of isolated phase bus duct ipbd systems are not maintenancefree. Nonsegregated phase bus has all phase conductors in a common enclosure with an air space between phases. Around the world, azzs medium voltage bus duct systems are found in a wide range of critical applications that demand the highest degree of reliability. An example of the way generator voltage phasescreened busducts are written in orders and technical documents is given below.
Busduct is a system of distributing electric power using copper or aluminium busbars with suitable enclosures to. All these bus ducts are completely capable of adding up or moving. Consider the consequences to your plant operation if. Mdy busduct system a reliable and safe solution for power transmission 3 the mdy busduct system a reliable solution for power transmission in. Metal enclosed bus duct designs isolated phase bus nonsegregated phase bus cable bus segregated phase bus. Isolated phase bus duct isolated phase bus duct iso phase is used to connect the high voltage and high current output of the generator to transformers that either transform the voltage higher for the transmission of the power over the utility transmission grid or steps the voltage down for use in the station. Nonsegregated phase bus duct technical data td01702001e effective. Your isophase bus duct system needs critical maintenance that prevents equipment failure or emergencies that can cause costly downtime. Designed for use on circuits whose importance requires greater reliability than power cables provide, the bus medium voltage bus is. In addition, the miniphase bus duct is a very competitive product where. And when it comes to bus duct sizing, there is a model for everyone. Pdf analyses of threedimensional eddy current field and.
Copper conductor bus bars in case if required for the non segregated phase busducts, segregated phase bus ducts and for low reactance interleaved bus duct. Get best price and read about company and get contact details and address. In the larger current ratings, dry air is forced through the enclosures and within the tubular conductors for forcedair cooling of the conductors. This manual will be divided into several sections each section pertaining to a specific line of bus duct com plete with all of the dimensions, voltage drop curves, and characteristics. Each phase conductor is enclosed by an individual metal housing, which is sepa.
The number of phase bars is determined by the rated current and service conditions. Unit 1 and unit 2 isolated phase bus duct welding and installation. Mar 06, 2017 service approaches to maintenance of isolated phase bus duct ipbd systems are not maintenancefree. Bus ducts are usually designed under three methods, common metal shell with uncut phases, common metal shell with isolated phases, and phasetype bus duct with separate shell. With current carried between the generator and a stepup transformer solely via the ipbd system, it is the indisputable critical core of any power generation operation. Because of its compact dimensions, relative light weight and userfriendly design, nonsegregated phase bus duct is easy to install. In electrical engineering, isolatedphase bus ipb, also known as phaseisolated bus pib in some countries, is a method of construction for circuits carrying very large currents, typically between a generator and its stepup transformer in a steam or large hydroelectric power plant. In this paper, a threedimensional eddy current field model to calculate the eddy current losses in an isolated phase bus ipb is proposed. Isolated phase bus duct suppliers powergear limited powergear is the manufacturer, supplier and exporter of power systems in india. Taps are taken to unit auxiliary transformer, lavt cubicle, excitation cubicle etc.
Whatever your isolated phase bus service needs are, our complete compliment of specialty trained inhouse isolated phase bus duct service teams, along with our state of the art equipment and tools, ensure we deliver a safe and high quality job from concept to completion. Isolated phase bus duct systems transformers magazine. Azz segregated phase bus represent an innovative design that provides effective performance and low maintenance. Combined with bus duct disconnects, switches, and bus plugs among other components, every bus duct system relies on bus duct to deliver the electricity throughout the system. Isolated phase busduct is a custom designed busbar system enclosed in an aluminium duct forming the interconnection between generator and generator transformer through generator circuit breaker. In electrical engineering, isolatedphase bus ipb, also known as phaseisolated bus pib in. Phase screened generator voltage 20 kv busduct with. Rms energy was contracted to perform a thorough inspection, cleaning and conduct maintenance of the isolated phase bus duct ipbd. Uma control offering isolated phase bus duct, electrical bus duct, in ahmedabad, gujarat. Isophase bus condition assessment doble engineering company. Nonsegregated phase bus duct is available for voltages ranging from 600v through 38kv with ampere ratings up to 6000 amps. Each phase conductor is mounted in an individual enclosure and is carrying a much higher current for a given permissible temperature hence it has a large eat dissipation as compared to segregated and nonsegregated phase bus duct. First, the center conductor, if copper, requires four to five times the amount of hardware than an aluminum extruded conductor.
The bus is designed for easy installation and meets all applicable safety standards. Isolated phase bus is made in ratings from 3000 amperes to 45,000 amperes, and rated for voltages from 5000 volts up to about 35,000 volts. This type of enclosure is dealt separately in chapter 31. Cleaning included dry iceblasting of insulators and conductors, and wiping the interior and exterior of the bus duct of. Laminated or braided flexible enclosure with aluminium m. Ge industrial solutions metal enclosed nonsegregated bus duct. Metal enclosed bus duct in which all the phase conductors housed in common metal. An example of the way generator voltage phase screened busducts are written in orders and technical documents is given below. Mdy busduct system a reliable and safe solution for power. The usual application for isolated phase bus is in power plants connecting the generator output to the main stepup transformer. Segregated phase bus one in which all phase conductors are in a common metal enclosure but are segregated by metal barriers between phases. Isolated phase bus duct is an electronic contraption that passes on tremendous streams amongst a generator and its transformer in a power or enormous hydroelectric power plant. Isolated phase bus duct ipbd is the main conduit for power distribution in a power generation facility.
Isolated phase bus is available for voltages ranging from 15kv through 38kv, with ampere ratings up through 42,000 amps. The company is a market leader in the country for design, manufacture, erection and commissioning of isolated, segregated and nonsegregated generator bus duct from 60 mw 660mw power plants and above. Isolated phase bus has the conductor for each phase in a separate metal enclosure. The isolated phase bus duct ipbd is the main conduit for power distribution in a power generation facility. Foreign material or objects inside bus defective bus pt connections open pt highvoltage fuses contaminated insulators dirt, dust or water an electromagnetic interference emi diagnostics survey from doble is an online, noninvasive test that can detect a wide variety of.
The need for proactive maintenance cannot be overstated in order to. Isolated phase bus ducts systems are vital components in power plants that are often overlooked. Ge industrial solutions metal enclosed nonsegregated bus. These are delivered for power plants and immense trading station applications to give them veritable and security operation.
Around the world, azzs isolated phase bus duct systems are found in a wide range of critical applications that demand the highest degree of reliability. The advantages of aluminum in isolated phase bus specific to isolated phase bus duct ipbd, aluminum is far superior than copper as the center conducting material. This standard is to to ensure bus quality in process of packing, storing and shipping. The company was established in the year 1980 in chennai, tamilnadu, india. There is a gener al application section that applies to all types. Protection against 3 phase short circuit high reduction of shortcircuit forces between phases of ipb the ipb design solution meets thermal and mechanical requirements under short circuit conditions calculations verified by tests up to 450 ka low temperature rise in steel supporting structure or concrete rebar due to low. Design description of isolated phase bus duct paper typical ct and st turbine ipb layout design drawings reference only the advantages of aluminum in isolated phase bus design typical gas turbine. These isophase bus duct systems are the only critical components within the plant that have no redundancy and no quick replacement solutions. Brilltech is specialized isolated phase bus duct manufacturers from india, high quality isolated bus duct suppliers, isolated bus ducts exporters from delhinoida, supplying globally at.
These are metal enclosed busducts wherein all the three phase busbars are enclosed in a common enclosure and the all the phases are segregated by means of nonmagnetic metal barriers preferably made of the same materials as that of. Mdy busduct system a reliable and safe solution for power transmission 3 the mdy busduct system a reliable solution for power transmission in demanding environments the selfsupporting frame construction of the mdy busduct is achieved using corrosion resistant aluminium profiles. Apr 20, 2016 infrared thermal inspection of isotherm isolated phase bus ducts. The ideal segregated phase bus duct solution for rugged applications. The isolated phase bus is made of highgrade aluminum for the isolated phase bus enclosure and the isolated phase bus.
A sample of bus duct separated phase is presented in figure 1. Infrared thermal inspection of isotherm isolated phase bus ducts. In addition, the mini phase bus duct is a very competitive product where multiple cables per phase are required. Often, plant managers will make an incorrect assumption that ipb systems are selfmaintained with little human intervention needed. Bus duct should always be placed on the floor horizontally and, wooden battens or forms are placed underneath the busduct.
System configurations optional ground bus optional ground bus optional ground bus optional ground bus optional ground bus optional ground bus three phase, threewire 12003200 a 635 v 515 kv three. Welcome to the daqo group of companies dedicated to providing world class products for both lv low voltage and mv. Refurbishment of isolated phase bus that was damaged by others prior to installation. Our programs ensure continuous improvement of our design and construction services, quality in our work safe execution and customer satisfaction. These are metal enclosed busducts wherein all the three phase busbars are enclosed in a common enclosure and the all the phases are segregated by means of nonmagnetic metal barriers preferably made of the same materials as that of the bus enclosure with degree of protection ip65. Nonsegregated phase bus a wide range of fittings duct is an assembly of bus conductors with associated connections, joints and insulating supports confined within a metal enclosure without inter phase barriers.
The cooling air is recirculated through a heat exchanger. Bus duct is one of the most important components of electrical busway. Long term storage is any amount of time over thirty 30 days after receipt of material or sixty 60 days after shipment from the factory. Nonsegregated phase bus is an assembly of bus conductors with associated connections, joints, and insulating supports confined within a metal enclosure without interphase barriers. Isolated phase bus one in which each phase conductor is enclosed by an individual metal housing separated from the adjacent conductor housing by an air space. Our products are busducts, control panels, switchgear and much more. Specifically designed for power plant and large switching station applications, the stace bus duct miniflux allwelded isolated phase bus provides reliable operation with a minimum of maintenance.
Isophase bus condition assessment doble engineering. Brilltech is counted amongst the reliable isolated phase bus duct manufacturers, exporters and suppliers from uttar pradesh india and is specialized in providing large array of isolated phase bus ducts that are made with best durability and as per advanced industrial standards. These iso phase bus duct systems are the only critical components within the plant that have no redundancy and no quick replacement solutions. What is the condition of your isolated phase bus that delivers power from your generator to transformers. The bus duct is designed, manufactured, and tested in accordance with ansiieee standard c37.
Bus ducts are used for connection of high power machines in power plants, distribution plants and industry. Scribd is the worlds largest social reading and publishing site. Welcome to the daqo group of companies dedicated to providing world class products for both lv low voltage and mv medium voltage bus duct systems. Al 0 2500 2800 3500 4000 cu 1900 3200 3500 4300 4900 6000 width, mm 400 600 600 800 800 al 30 40 50 70. Certain bus ratings can be supplied with csat listing. Infrared inspection of isolated phase bus ducts youtube. Originally developed in the 1960s, isolated phase bus ipb or ipbd, is a method of construction for circuits carrying very large currents, typically between a generator and what is called a gsu generator stepup transformer. The isolated phase bus ipb duct system is an inert system with no moving parts. The specification standard covers isolated phase bus duct and accessories for long term storage of the bus system. Ge industrial solutions metal enclosed nonsegregated bus duct description nonsegregated phase bus duct is designed for interconnecting groups of metalenclosed or metal clad switchgear, power transformers or other related equipment. So constructionally the current busduct consists of three basic types. Ipb isolated phase bus duct natural cooling and ipbfc isolated phase bus duct forced cooling busducts are produced according to the tu 34140011049601 standard. This bus can be used in reduced space and is also designed for ac or dc excitation leads in power plants or for industrial applications where severe conditions can cause problems to the electrical equipment.
The company offers a wide range of natural air cooled isolated phase. Cleaning included dry iceblasting of insulators and conductors, and wiping the interior and exterior of the bus duct of coal dust. There are no metallic barriers between phase conductors of adjacent phases. Foreign material or objects inside bus defective bus pt connections open pt highvoltage fuses contaminated insulators dirt, dust or water an electromagnetic interference emi diagnostics survey from doble is an online, noninvasive test that can detect a wide variety of defects in isolated phase bus duct. Installation of delta unibus isolated phase bus duct system.
Innovative isolated phase bus duct systems to meet global demands. Lobal ngaged in the field of isolated phase bus ducts ipb. The insulators with their carriers, fastened to the. Isolated phase bus duct manufacturers india, isolated bus. Rawafid systems is a saudi registered company based in riyadh, saudi arabia. This type of duct is used primarily for the outlet of generator outputs at current levels as high as 28 ka and voltages of 36 kv.
Abb low voltage and medium voltage busducts are safe, compact, flexible, reliable and efficient solutions for electrical power distribution. Azzs bus systems are built to deliver decades of reliable service in some of the most hostile environments. Isolated phase bus duct ipbd bus duct system suppliers. The company offers a wide range of natural air cooled isolated phase bus duct from a to 25,000a.
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