New topics have been added since the first edition, including trauma ct cervical spine interpretation, and an uptodate section on acute stroke. History 1924 mathematical theory of thomographic image reconstructions johann radon 1930 conventional tomography a. You should also be aware that knowledge testing is offered by appointment only at certain connecticut dmv locations, so you will need to make an appointment online before you go. The burden in a ct metering electrical network is largely resistive impedance presented to its secondary winding. Basics of ct and pt free download as powerpoint presentation. Basics of ct and pt transformer physical quantities. Manufacturer of ct pt test equipment ct pt analyzer, ct and pt testing, electrical testing solutions and hv ct ratio tester offered by greenwatt techno solutions private limited, gurgaon, haryana. This testers have big display lcd screen with human computer dialogue operation. The pt ct module accepts four voltage inputs and four current inputs as shown in figure 1. A wide variety of transformer ct pt testing equipment options are available to you, such as auto testing machine. Computed tomography ct body computed tomography ct of the body uses sophisticated xray technology to help detect a variety of diseases and conditions. Basic principles of computed tomography univerzita karlova. Below features make gw ct pt analyzer and ideal tool for ct pt manufacturer, testing labs, substations upto 765kv, power plants etc.
Apply voltage through a variac on the open secondary of the ct and measure magnetizing current on the secondary. When the circuit burden gets too large, the ct secondary voltage becomes distorted. A dedicated land line into the metering enclosure is required for the revenue meter. Convert ct to pdf with reaconverter batch conversion software. No external other auxiliary equipment, standalone to complete all test items. Ctpt test equipment ct pt analyzer manufacturer from gurgaon. Why do we use standard current transformers and standard potential transformers while testing a given ct and pt. Pdf pro 3 lets you read, edit and annotate your pdf documents directly on your iphone and ipad. Tested are also working conditions of equipment by checking the wiring and burden load of transformers. Our ctpt tester is a microprocessor operated digital instrument. The present book will try to explain the physical principle behind each of these imaging modalities, together with a description of how these are implemented. For what purpose these standard cts and pts are used in testing field. A current transformer ct is a type of transformer that is used to reduce or multiply an. What is the abbreviation for current transformers, potential transformers.
However you need to select the proper ct and pt and if you are measuring 3phase power you need to connect. So you can save the time and energy you would lose with doing repetitive operations. A full list of test date procedures is available on the ets website. Dear colleagues, i am currently working on fusion of medical images, in particular those generated by pet and ct modalities, to improve. The ct and pt works on the principle of transformer and lowers the current andor voltage at a lower value which can be safely and easily measured. Each exam is set up specifically for a candidate, to fit their needs for both ease of scheduling and to reduce the cost of application. The ct analyzer is a test system for protection and metering cts according to ieee and iec standards. Use of standard ct and pt while testing a given ct and pt. A current transformer is, in many respects, different from other transformers. The following table lists the tests that can be performed on ct and vt. In the beginning the needle will completely pierce the test block. Testatfield simplewiring p1 s1 load s2 p2 softwareinterface testreport pct200ireport pctseriesreportanalyzesoftware standardaccessories softbag testleads. A protection core is designed to transform a distortion free signal even well into. Instrument transformers application guide abb group.
Burden artificial load for voltage and current transformers electronically compensated current and potential burden according iec 60044 and ansiieee c57. Mobile multislice computed tomography is an alternative to these traditional modalities as it provides a greater. Steady and transient state characteristic tests of various types of ct pt. The dmv provides drivers manuals with all the graphics and illustrations featured in the print edition. The importance of current transformer tests is often underestimated. Professionalproviderofpowertestinginstrument pct200seriesct. Excellent for radiology residents and practitioners, fundamentals of body ct presents an easily accessible introduction to body ct. So your doctor can understand results in the same wayeven when they come from different labs and differenttest methods. Usually the second in the series though not always see cip. Governor lamont is telling connecticut residents to stay safe, stay home. Increased rows in main time table sheet from 200 to 520. It is an equipment with high roi return on investment.
Ct scan angiography of the thoracic aorta siemen clvt d. Heres a summary of the current transformer testing paper. Introduction the kneepoint of any transformer is the point at which the core starts to saturate presenting thus a low impedance path for the current to flow. I am je of nagbhir sub station of 225 kv newly electrified section and testing started of current transformer when test ct ratio by injecting current in primary bushing of old ct which was 20 years old ct installed in circuit,after testing values not found according to ratio,100 amps inject and found in secondary terminal 3. This 40 multiplechoice question connecticut dmv permit practice test requires the same passing ratio as the real exam, so you must answer at least 32 questions correctly. To insulate the metering circuit from the primary high voltage system. Udey testers are the first choice for many electrical power utility companies. Back to the basics current transformer testing ct as test equipment becomes more sophisticated with better features and accuracy, we risk turning our field personnel into test set operators instead of skilled field service technicians. The portable, high accuracy test sets allows performing tan. Section 7 of the ansineta standard for acceptance testing specifications for electrical power equipment and systems may be reproduced and used on a cut and paste basis for the particular type of equipment to be tested. Convert ct to pdf with reaconverter batch conversion.
You can register below for any of the dates available at crecs testing center, room 309 in crecs colt building at 55 van dyke avenue, hartford, ct. Standard for acceptance testing specifications for. To download a free copy, additional appendices, or order a hard copy of this. Free connecticut dmv permit practice test three 2020 ct. Oct 24, 2016 download fundamentals of body ct, 4e 2015 pdf unitedvrg reshared torrent or any other torrent from medical category. Fulltextsearch your entire pdf library with just a single tap. Adopt lcd, selfequipped mini type printer supporting. Free radiology books download ebooks online textbooks. Ct s for metering purposes must have a high degree of accuracy to ensure accurate billing while those used for protection must react quickly and correctly in the event of a fault. Trouble shooting of all electrical circuits, control and protection circuits coordination with client in as built scheme drawing submission, test report submission. Din standard 12 kv ct single and double secondary 16 din standard 24 kv ct single secondary 17. Greenwatt has come up with a state of art gw ct pt analyzer for ctpt testing. T2000 test set for testing cts, pts, primary injections.
The ratio then is not accurate enough and due to this reason it may cause misoperation of the protective relays. Download fundamentals of body ct, 4e free gracebackup. If the meter phone line cannot be dedicated to the meter, the generating. Inr international normalized ratio stands for a way ofstandardizing the results of prothrombin time tests, nomatter the testing method.
The pt ct module only installs in slot f in the pcd case see figure 6. On test day, arrive 15 minutes early and bring a valid id and your test fees. Such specially constructed transformers with accurate turns ratio are called as instrument transformers. Ctpt analyzer standard gf106 ctpt analyzer is mainly used for. Ct analyzer with one button click all test items, such as excitation, winding resistance, polarity, phase error, ratio. In emergency cases, it can reveal internal injuries and bleeding quickly enough to help save lives. These instruments transformers are of two types i current transformers ct and ii potential transformers pt. Ct analyzer current transformer testing, calibration and. This new ct pt testing set are based on low frequency and variable frequency methods which lead to the great reduction in weight and high knee point test range.
Ct pt abbreviation stands for current transformers, potential transformers. The following sections of the ansineta standard for acceptance testing specifications for. In addition to the clinical chapters, this handbook provides simplified technical details, and a brief historical background, making it an excellent reference manual and learning aide for all. The ct computer displays these pictures as detailed images of organs, bones, and other tissues. I wrote an article for the neta world magazine in 2004 that covers several different manual techniques for current transformer testing that should help even the most experienced technicians. The pt evaluates patients suspected of having an inherited oracquired deficiency in these. A ct scan is sometimes called a cat computerized axial tomography scan. Ct complete pdf notesmaterial 2 download zone smartzworld. Pt ct module the pt ct module is comprised of six different types to accommodate varies ct tap and setting ranges. Current transformers testing and commissioning guidelines. Magnetization curve saturation test this test is usually only done for ps class cores of current transformers to verify the value of vk of the ct. The guiding system, the new way to create your electrical installations a comprehensive offer of products with consistent design the guiding system is first and foremost a merlin gerin product. The connecticut river watershed the trust for public land. Medical imaging is a collection of technologies, all having the purpose of visualization of the interior of the intact, living human body for the purpose of diagnosis.
The rating of an instrument transfer is expressed by two groups. Ct pt auto test a systematic way to increase the efficiency, productivity of the ct pt testing department. Ct pt testing manufacturers in india udeyraj electrical. Highlight text, take notes, embed shapes or draw with your finger.
The original magnitude can be determined by just multiplying the result with the transformation ratio. Jun 16, 2017 download version download 64 file size 6. All nonessential workers are directed to work from home, and social and recreational gatherings of more than five are prohibited. For energy measurement connect the ct and pt secondary to the terminal of the energymeter. History 1924 mathematical theory of tomographic image. Computed tomography ct is a diagnostic procedure that uses special xray equipment to obtain crosssectional pictures of the body. The ct scanner is a large camera with a circleshaped opening in the middle.
Instrument transformer basic technical information and. Please find the ct complete pdf notes download button. We collected some important current affairs quiz questions and answers pdf from our 2020, 2019, 2018, 2017, 2016 daily quiz data base and make it as pdf format, kindly download the pdf in below link we hope it will definitely help you for your upcoming exams. The pt is typically described by its voltage ratio from primary to secondary. These versions are in portable document formats pdf and must be viewed and printed through adobe acrobat. Jul 29, 2017 why do we use standard current transformers and standard potential transformers while testing a given ct and pt. Cv engineer electrical testing and commissioning ht, lt. Cts for metering purposes must have a high degree of accuracy to ensure. The td x 5000 is developed to furnish a more compact solution to who is interested only on tan. Test results are kept in local memory or in a usb card, and can be transferred to a pc later, along with settings. Bleeding timeclottingtimeptandptt linkedin slideshare. For some, nesting bald eagles or the annual flights of migratory birds. Gw ct pt analyzer is an all in one solution for testing all type of ct pt as per iec standards.
When a body tissue is injured and begins to bleed, it initiates a sequence of clotting factor activities the coagulation cascade leading to the formation of a blood clot. From a maintenance and testing program to a maintenance program which includes at least one of the following activities. Download medical books free pdf with provides over 50000 file medical books pdf free download and more for all students and doctors this website the best choice for medical students during and after learning medicine. Liquid penetrant and magnetic particle testing at level 2. Single and multiratio current transformers can be tested. You can even embed voice recordings or photo annotations. Ct analyzer with one button click all test items, such as excitation, winding resistance, polarity, phase error, ratio, etc, can be performed automatically. Where land line is not available, and cellular cell signals are acceptable, the use of cellular phone is acceptable.
Ct scanning is fast, painless, noninvasive and accurate. Ctpt auto test, current transformer auto test, potential. Where should i download pet and ct test images for research. References to specific designs, models, manufacturers, andor modifications of ships and aircraft are used only for the purpose of historical consistency and do not assume any funding or other involvement in the project on the part of the holders of trademarks. A protection core is designed to transform a distortion free signal even well into the overcurrent range.
Pt, inr, and aptt testing, contd from page 2 the clsi recommends that the capped specimen tube be centrifuged for sufficient time and speed 10 minutes at 1500g at room temperature to consistently create plateletpoor plasma, since the presence of platelets in the specimen can shorten clotting times. The use of advanced power technology, the test knee point reaches up to 40kv. It uses xrays to take pictures of the inside of a patients body. Ct test, easy to test, all the tests are using the same wire connection except the load test. If you are talking about the transformers inside test equipment, like a ttr for example, the known ratio is used to calculate. A protection core is designed to transform a distortionfree signal. Testing of ct, pt, cvt, circuit breaker, switch gear and power transformer operation and maintenance of power plant and substation. Protection system part deux 332015 1 a superficial, unnecessary, or overly bad sequel. Current transformers ct are a series connected type of instrument. Repeat this procedure until the needle, when brought in contact with the test block and released as described above, fails to pierce the block for 5. Instrument transformers are high accuracy class electrical devices used to isolate or transform. A ct scan is one of many services offered by the department of radiology and medical imaging at cincinnati childrens. Computed tomography ct donut shaped machine uses xray energy and computer generation of images advantages sensitive to slight density difference cross sectional anatomy attenuation. Public safety testing is pleased to offer candidates the ability to take their written exams in locations around the united states, scheduled on an individual basis.