220 kv current transformer pdf

A current transformer is essentially a stepdown transformer which stepsdown the current in a known ratio, the primary of this transformer consist of one or more turn of thick wire connected in series with the line, the secondary consist of thick wire connected. Unless otherwise specified, the rated continuous thermal current shall be the rated primary current. The technical result consists in improving the design, increasing the level of explosion, seismic resistance of the transformer. Tg gasinsulated high voltage current transformers 72. Current measured on the burner with 5mm spark gap, blowing air and suppressed cables. The sub transient reactance x d of the generator is 0.

Now to dispatch your 20 mw power, you may also need a transformer of 2535 mva rating. A wide variety of 220kv current transformer options are available to you, such as current, power, and instrument. A stepdown transformer has a wide variety of applications in electrical systems and transmission lines. Scribd is the worlds largest social reading and publishing site. The analysis is done by using advance software electrical transient analyzer program etap with detailed short circuit analysis. Declaration i hereby declare that the project work entitled study of 220 kv substation is an authentic record of my own work carried out at pstcl 220 kv substation, as requirements of four months project semester for the award of degree of b. To check pricing and availability for a specific current transformer model, give us a call at 614 8896152 or use our quote request form. Why you should never disconnect current transformer from burden resistor when current is at primary duration. This 220 kv substation is located in maharashtra state electricity transmission. Failure of 220 kv current transformer yphase at 220 kv ongole substation, transmission corporation of a. Page 1 of 10 specifications for 220kv out door current transformers.

A 60 mva, y connected 11 kv synchronous generator is connected to a 60 mva, 112 kv. Below is a list of all current transformers available through flexcore, however, not all models are instock. Current transformer imb 145 pdf english pdf drawing. Among them, oil immersed current transformers are widely used in 220kv power systems with fast heat dissipation, uniformity conduction and insulation recovery. A highvoltage measuring current transformer with gas insulation for a voltage class of 220 kv contains a protective casing of metal. The study of 220kv power substation equipment details eep. Rated dynamic current i dyn the dynamic shorttime current is according to iec, i dyn 2. This job is again accomplished by a suitable apparatus called substation. The invention relates to electrical engineering for the registration of operating currents and shortcircuit currents in the network. Read more difference between dead tank and live tank ct.

Medium voltage instrument transformers ritz instrument. Industrial summer training report on uttar pradesh power corporation limited 220 2 kv substation barahuwa gorakhpur submitted in partial fulfillment of the requirements for the award of degree of bachelor of technology in electrical engineering ee submitted by ashutosh srivastava 75120016 submitted to. Current transformer type imb 245, 4000a, silicon rubber insulator. Current transformers 518 dimensional standardization of terminals. Also the hard copies as per specification shall be submitted. Standard values of extended primary current are 120, 150 and 200% of rated current. The circuit influence on the transformer stops as soon as the operating conditions come back to normal. Apr, 2017 report on industrial summer training on 220 kv substation 1. These transformers are huge and have very high nominal power even mva. A highvoltage measuring current transformer with gas insulation for a voltage class of 220 kv contains a protective casing of metal filled with gas or a mixture of gases. There are 3 cores for 33 kv feeder and 5 cores for 2 or 220 kv feedertransformer. The grid 220 kv substation, passiana is situated 78 km from bus stand of patiala to samana road.

The following ct stand utilised for all standard tp period supplied 220 kv cts. Since our commencement in 1989, we are recognized as a leading manufacturer and supplier of a wide array of transformers upto 220 kv class, current and potential transformer. The primary function of a 400220 kv substation would be to provide a conversion of different voltage levels so that power systems can be connected together to form a power system grid. These products are manufactured using high grade material like copper, transformer oil, crape tape, insulators, toroidal corelaminationcork sheet kraft paper and steel. Current transformers oilpaper, gas and dry insulation. About 220 kv substation passiana 220 kv passiana substations is one of the important substations of pstcl. Ru188675u1 highvoltage measuring current transformer.

Extended current ratings a factor that multiplied by the rated current gives the maximum continuous load current and the limit for accuracy. Presentation on industrial training in 220kv substation ig nagar, jaipur on the topic operation and maintenance of ehv equipment and trannsmission system. Oil insulated outdoor instrument transformers buyers. Imb oilminimum current transformers are based on a tank type hairpin design and available with porcelain or silicone rubber insulators. If sampling taps are not provided an alternative method of taking oil sample shall be provided.

D26 a tapping for oil sampling for periodic testing of insulation oil shall be provided at an accessible place of the ct. Reconnection the current transformer can be designed with either primary or secondary reconnection or a com. Specific parameters for 220 kv current transformers. Autocad format and manuals in pdf format, for offered item shall be.

Mar 23, 2020 they decrease voltage level from high to lower value e. A current transformer is an instrument transformer, used along with measuring or protective devices, in which the secondary current is proportional to the primary current under normal conditions of operation and differs from it by an angle that is approximately zero. These stands will be ordered by tp procurement at the same time as the equipment is order is placed. A2 current transformer construction the current transformers to be supplied shall be single phase, separately mounted, minimum oil, livedead to be selected tank type, and suitable for outdoor installations. Failure of 220 33 kv, 100 mva power transformer at 220 33 kv geeta colony. The basics of current transformers nk technologies. Trj120cvd 220240v 30w 20 ma 15 ma 2x14 kv 100% 60c grounded center trj230vd 220240v 65w 35 ma 21 ma 2x10 kv 33% su 3 60c grounded center trj230pvd 220240v 63w 30 ma 22 ma 1x15 kv 33% su 3 60c grounded pole the inlets the outlets iout burn. Acceptable specification of current transformer for metering. The term dead and live has their own meaning from the view point of potential of secondary windings and core. The actual ratings of power transformers, circuit breakers, current transformers, potential transformers and isolating switches are taken and modeled accordingly in etap.

You can also choose from single, three 220kv current transformer there are 107 suppliers who sells 220kv current transformer on, mainly located in asia. Our range of products encompasses current transformer 33 kv upto 220 kv and potential transformer 33 kv upto 145 kv. In this case, when the transformer turns ratio is not high the autotransformers are usually installed. Program etap to carry out load flow analysis of 220 kv substation. This oneline sketch of a 3phase system shows a simple con. A novel structure is posed to realize an optical voltage sensor which has better stability. Current transformers reduce high voltage currents to a much lower value and provide a convenient way of safely monitoring the. All the data used for analysis is real time and collected from 2202 kv. This paper presents a new optical transformer which can measure high voltage and large current simultaneously. Failure of 220 kv current transformer at 220233 kv. Current transformer basics and the current transformer.

Current transformers are classified as dead tank type and live tank type cts based on their construction. The ecodesign directive of the european union and the related regulation 5482014 for transformer losses requires manufacturers to publish on the internet information on rated power, load loss, noload loss and weight and type of the major components of typical transformers, which are compliant with the regulationon. Tg is a gasinsulated high voltage current transformer based on a topcore. All instrument transformers supplied by abb are tailor. The top countries of suppliers are china, taiwan, china, and india, from which the percentage of 220kv transformer supply is 98%, 1%, and 1% respectively. Normally for small and remote hydroelectric generating stations, 2535 mva, 22011. These products are manufactured using high grade material like copper, transformer oil, crape.

Difference between dead tank and live tank ct electrical. Current transformer white paper the basics of current transformers ratio the ct ratio is the ratio of primary current input to secondary current output at full load. Outdoor instrument transformers, catalog publication 1hsm 9543 40. The ecodesign directive of the european union and the related regulation 5482014 for transformer losses requires manufacturers to publish on the internet information on rated power, load loss, noload loss and weight and type of the major components of typical transformers, which are. Apr 11, 2018 current transformers are classified as dead tank type and live tank type cts based on their construction. You can also choose from three, single 220kv transformer there are 376 suppliers who sells 220kv transformer on, mainly located in asia. Failure of 22033 kv, 100 mva power transformer at 22033 kv geeta colony substation of dtl a. A current transformer ct is a type of transformer that is used to reduce or multiply an. You should be able to buy from the competitive market. They shall be fitted with oil sight glasses to visualize oil level inside. Guaranteed technical particulars for 220 kv current transformer. A current transformers role in power grids is to provide accurate inputs to on protection, control and metering systems including revenue metering. Cast resin insulated power transformers up to 40,5 kv, 25 mva.

When the circuit burden gets too large, the ct secondary voltage becomes distorted. No particulars 11 kv 33 kv 2 kv 220 kv 1 highest system voltage kv rms 12 36 145 245 2 ct ratio. Dead tank itself means that the potential of the tank of ct is at earth potential i. Ru188675u1 highvoltage measuring current transformer with. No particulars 11 kv 33 kv 2 kv 220 kv 1 highest system voltage kv rms 12. Lv voltages up to 1 kv and hv application voltages above 1 kv. It is amain source of power supply in the district of patiala. It has become a matter of high concern that many transformers are failing before their useful life. Nov 15, 2019 a current transformer is an instrument transformer, used along with measuring or protective devices, in which the secondary current is proportional to the primary current under normal conditions of operation and differs from it by an angle which is approximately zero. Industrial summer training on 220 kv substation ppt. The current transformers cts are to replace the existing out door 220 kv, oil filled type cts of the same capacity at name of power station of ceylon electricity board in sri lanka. Insulation and basic impulse insulation level bil kv. When it comes to the operation voltage, the stepup transformer application can be roughly divided into two groups. A wide variety of 220kv transformer options are available to you, such as power, electronic, and potential.

Current transformer imb 36 800 kv flexible design enables customertailored solutions. Instrument transformer basic technical information and. Page 4 of 10 d25 multi ratio current transformer shall be tapped on the secondary side. The measurement of voltage is based on the pockels effect. The transformers are a highly expensive equipment in a switchyardsubstation and is expected to serve the entire life of substation i. Autocad format and manuals in pdf format, for offered item shall be submitted. Report on industrial summer training on 220 kv substation.