for Parameters of generators, transformers, lines and cables for vars, voltage and loads control By electrical-engineering-portal.com Published On :: Mon, 31 Jan 2022 08:18:08 +0000 For a power system to operate efficiently and securely, the importance of the correct and coordinated provision and control of reactive power cannot be overemphasised. It is necessary to examine reactive power requirements under both steady-state and dynamic conditions. Although... Read more The post Parameters of generators, transformers, lines and cables for vars, voltage and loads control appeared first on EEP - Electrical Engineering Portal. Full Article Cables Transformers Transmission and Distribution cables capacitive charging current generators lagging power factor lines power factor power flow power system reactive compensation short-circuit ratio transformers transient reactance transmission lines transmission system var control voltage control
for Daily Warm-Up 34 for Gr. 3 & 4: American History By www.teachervision.com Published On :: 2016-12-31T08:00 Help students master important reading skills with a passage about the Pony Express and reading comprehension questions, in this printable warm-up. Full Article
for Do You Know How to Effectively Search for Information? By careertechtesting.blogspot.com Published On :: Thu, 05 Dec 2013 21:20:00 +0000 I found a resource that I wanted to share with created by Helene Blowers and published in the article entitled, "Do Your Students Know How To Search?" (Holly Clark, Edudemic, October 16, 2013). I think this article begins to address either the end of the Information Age or at least a progression toward a different stage within the Information Age and the question now becomes what do we do with the information that has been collected? I believe there will be a great need for those who can not only find relevant information, but for those who can analyze information. According to the article: There is a new digital divide on the horizon. It is not based around who has devices and who does not, but instead the new digital divide will be based around students who know how to effectively find and curate information and those who do not. Helene Blowers has come up with seven ideas about the new digital divide – four of them, the ones I felt related to searching, are listed below. Clark continues the article by including some of the searching skills and vocabulary that she believes we should be teaching our students (and learning ourselves): Some of these skills include: Quotation Marks Dashes Two Periods Site Search Country Codes Filter Bubbles Primary Sources Please click HERE to find out more about these search tools and how to improve your internet searches. Full Article CareerTechEd Education Instruction Research Technology
for Glean - Searching the Web for Educational Videos By careertechtesting.blogspot.com Published On :: Mon, 27 Jan 2014 15:46:00 +0000 I wanted to tell you about a service I recently discovered called Glean. Glean searches the web for educational videos (lessons) in math and science and then structures and organizes them (setting, pace, teaching style, grade level, etc.), tags them by educational standard and adds interactive tools, i.e. Q&A and practice exercises. As you provide feedback, Glean selects the best video lessons for you based on your learning styles and preferences. Glean - Exploring the best video lessons in education Full Article Curriculum Education Instruction Online Learning Technology
for Tips on Reducing Test Anxiety for Online Test-Takers By careertechtesting.blogspot.com Published On :: Wed, 05 Feb 2014 20:00:00 +0000 I just read a great post by John Kleeman on the Questionmark Blog that I wanted to share with you concerning test anxiety. We have previously discussed test anxiety (here and here), but it is interesting to read Kleeman's take on the difference in test anxiety between online and paper and pencil assessments. Here is the post in its entirety: Ten tips on reducing test anxiety for online test-takers I’ve been reading about test anxiety (concern or worry by participants sufficiently severe that it impacts test performance). I’d like to share some tips on how online assessment sponsors can reduce its likelihood. When creating and delivering tests, you seek to accurately measure knowledge, skills or abilities. Often you want to check competence or mastery for workplace or compliance reasons. If some of your participants have severe test anxiety, this doesn’t just disrupt them, it makes your test less accurate in measuring real performance. You might end up failing someone who is competent, just because anxiety affects their test performance. Many studies (for example here) report that online tests cause less test anxiety than paper ones. Here are some suggestions on reducing test anxiety: 1. Some people have anxiety about a test because they haven’t mastered the subject being tested. Provide a clear description of what each test covers before the time of the test, and provide study resources or instruction to allow people to master the subject. 2. Test anxiety can also feed on unknowns, for instance on unfamiliarity with the test or believing untrue myths. Share information about the test’s purpose and what you do to make it fair. Also share information about the content: how many questions, how the scoring works, how much time is available and so on. Explain what happens if someone fails – for instance is it possible to retake? 3. It’s hugely valuable to provide practice tests that participants can try out before the real test. This will tell them where they are strong and weak and allow them to gain confidence in a less stressful environment prior to the real test. See my article 10 reasons why practice tests help make perfect exams for other reasons why practice tests are useful. 4. Give participants an opportunity to practice using the same type of computer, mouse, keyboard and user interface as will be used for the real test. This familiarizes them with the test environment and reduces potential anxiety, particularly for those who are less computer literate. If you are using Questionmark to deliver the test, make practice sessions available with the same template settings and the same types of questions. (Sometimes this is done with a fun quiz on a different topic, just to get people accustomed to the user interface.) 5. If you provide guidance to test-takers, point to self-help resources for people who have test anxiety. ETS provide a good resource here for instance. Another resource from the University of California is here. 6. Some self-help resources suggest breathing exercises or other exercises people can follow to reduce tension for people who are anxious about tests. Provide an environment where this is practical and train your test administrators and proctors about the prevalence of test anxiety. 7. If you have a way of encouraging test takers to sleep, take exercise and eat healthily, all these things aid a rational approach to taking a test and reducing anxiety. 8. If it works in your programme, consider whether it’s worth having a series of tests rather than a single test, so there is not a single “make or break” moment for participants. A series of tests can have other benefits too. It makes cheating harder, and by spreading out learning and revision, it can make participants retain the learning better. 9. People with disabilities are more likely to suffer test anxiety. Ensure that your program of accommodations takes this into account. See this helpful article on reducing test anxiety for people with disabilities. 10. Above all, create good quality, fair tests. If you follow good practice in authoring your questions and assessments, then there is less to be anxious about, as the test will be a good measure of performance. See Questionmark’s white paper “Five Steps to Better Tests” for some helpful advice in creating tests. Many Questionmark users provide very effective practice quizzes and tests which help reduce test anxiety, and I hope these tips are helpful, too. I’d love to hear additional input or suggestions. Thanks again to John and Questionmark for allowing us to share their thoughts on assessment! Full Article assessment CareerTechEd Education Online Learning Questionmark Test Taking Tips Testing in the News
for OSU - CareerTech Digital Forum: Educating for Global Coompetitiveness By careertechtesting.blogspot.com Published On :: Tue, 10 Jun 2014 15:21:00 +0000 Oklahoma State University and the Oklahoma Department of Career and Technology Education invite you to watch their digital forum entitled "Educating for Global Coompetitiveness" on Friday, June 13, 2014 (Speakers are from 8:30 a.m. - 12:15 p.m. CST). Featured speakers are OSU President Burns Hargis, CareerTech State Director Dr. Robert Sommers, Tom Vander Ark, and David Cillay. I've had the opportunity to previously meet and discuss customized learning with Tom Vander Ark, author of Getting Smart: How Digital Learning is Changing the World and CEO of Getting Smart, a education advocacy firm, but I'm excited to hear his newest thoughts on the subject and how learning is becoming more competency-based. Dr. Cillay, Vice President of WSU Global Campus, led the 2012 launch of the Global Campus, which includes WSU’s online degree program. His responsibilities include expanding WSU’s market share, supporting faculty in technological innovation and using e-learning tools to ensure that WSU remains open and accessible. I'm also excited to learn from this presentation as it should add great value to what we are trying to accomplish with digital delivery at the Oklahoma Department of Career and Technology Education. Please join the discussion on Twitter at: #DLFTalk and click here to watch this free live event! Full Article CareerTechEd CTE Education Education Instruction Leadership Online Learning Research Technology Training and Resources Twitter
for Blended Learning and Career and Technology Education - Part III: Implications for Career and Technical Education By careertechtesting.blogspot.com Published On :: Mon, 02 May 2016 19:44:00 +0000 In this four-part series, I’ll define blended learning, discuss the models of blended learning, the implications for career and technical education, and how the Curriculum, Assessment, and Digital Delivery (CADD) areas of the Oklahoma Department of Career and Technology Education can assist in the implementation of blended learning. Here are several ways that blended learning can have a profound effect upon career and technology education: Personalized instruction – Blended learning allows for a more personalized and interactive learning experience by putting the student in charge of their own learning. Taking the best of traditional education and blending it with the power of online learning will provide the teacher an opportunity to review data, in the moment, determine where the student is at and to form instruction for the next period or the next day. Increased monitoring – The use of a student information, assessment, and gradebook systems that link to the LMS provides instant feedback on assignments and assessments. This allows the instructor to spend time reviewing student data, adjust instruction, and provide additional classroom or individual instruction. Open entry/Open exit – Blended learning fits nicely with competency-based learning and the concept of open entry/open exit. Personalized instruction and increased monitoring will allow the instructor to more accurately determine when tasks and competencies are achieved. Increased enrollments – Depending on the blended learning model and the CTE program being offered, enrollments could potentially be increased. Increased performance gains – “The Rise of K–12 Blended Learning - Profiles of emerging models” by Heather Staker profiles 40 educational entities. Not every school reported gains and some thought it was too early to verify results, but many posted positive gains when compared to the traditional classrooms within the same district. For example: “School of One - Students in summer 2009 acquired new math skills at a rate estimated to be seven times faster than peers. Students in spring 2010 showed gains that, when annualized, would equate to 1/2 to 2/3 of an additional year of gain. Students in spring 2010 showed significant gains across all academic quartiles.” Other potential benefits from this study include increased retention rates, an increase in teacher/parent contacts, increased course completion rates, a strengthening of curriculum offerings, and lower instructional costs. As you can see, blended learning can have the potential to benefit the student, the instructor, and the parents in a careertech setting. Again, I’m not aware of any research that helps decide if one model works better with any certain occupational area (if you know of any research in this area, PLEASE SHARE!!). Full Article Blended Learning CareerTechEd CTE CTE Education Education Instruction Online Learning Technology
for Some of the Best Educational iPad and Android Apps for Teachers By careertechtesting.blogspot.com Published On :: Thu, 25 Aug 2016 14:14:00 +0000 Educational Technology and Mobile Learning provides a list of some of the best iPad apps curated for learning and instructional purposes. The list is divided into 19 sections with each containing a list of apps for a specific need. The sections include apps that facilitates: presentation screencasting video creation file storage whiteboard PDF annotation audio recording note-taking blogging book creation comic apps digital storytelling apps apps for grading mindmapping apps portfolio apps apps for creating posters apps for creating timelines apps for creating word clouds speech-to-text apps Educational Technology and Mobile Learning also provides a list of 10 indispensable Android apps for teachers. The list is curated from the top trending apps in the education section of Google Play store. The listed apps are as follows: Book Creator Handouts Remind Google Keep ClassDojo Nearpod Socrative Teacher Edmodo Google Classroom Explain Everything Full Article Apps Education Instruction Mobile Learning Technology Technology Apps Training and Resources Web 2.0
for Wizer - A Free Platform to Create and Share Interactive Worksheets for Your Students By careertechtesting.blogspot.com Published On :: Tue, 30 Aug 2016 16:18:00 +0000 Wizer is an educational platform that allows instructors to create quick, easy and fun digital worksheets, to share them with fellow instructors, and to keep track of student performance. The "FAQ's" below will tell you question types, multimedia resources, login formation, and some of the technology requirements. As you know, "free" and "time-saving" are important factors to me.... Wizer FAQ's: 1. How much does Wizer cost? Wizer is FREE for teachers. You may build, assign, share and use as many worksheets as you like for free. 2. How many worksheets can I make? As many as you want! The use of the Wizer digital worksheet builder is unlimited. Make as many as you’d like. Please click to ‘share on gallery’ so that other Wizer teachers can see what you’ve created and use it with their students. Your influence is growing! 3. Can I use another teacher’s worksheet? Yes. Wizer is a community of innovative teachers who create and share their digital lessons. Any worksheet on the public gallery can be used by simply clicking ‘Use’ or ‘Use this worksheet’. This duplicates the worksheet and puts the copy in your account. You can use it as-is or make some adjustments to fine tune it for your students. 4. What is the public gallery? When teachers create a worksheet, they may chose to ‘publish on gallery’ to share it with other teachers. Any worksheet shared on the public gallery can be viewed by other teachers for inspiration or used with their students. To use a gallery worksheet, just click ‘Use’ or ‘Use this Worksheet.’ 5. Does Wizer work on iPads and tablets? Yes! Wizer worksheets can be completed on any iPad or tablet. 6. Does Wizer work on Chrome Books and laptops? Yes. Any 1-to-1 device that is connected to the internet and has a web browser can be used to create and complete Wizer worksheets. The best browsers are Chrome and Safari. 7. How do I assign the Wizer worksheet to my students? To assign a worksheet to students do the following: When creating the worksheet, at the navigation on top click on 'Assign to students'. On the window that opens you can create an assignment for each class. Each gets its own link & pin code so you can later review their answers separately for each class. There are 3 ways for you to share it with the students (from left to right): 1. Use the Google Classroom link and follow Google's instructions. 2. Copy the link and simply share it with your students. 3. Instruct your students to go to this link: https://app.wizer.me/learn/ and enter the pin code. 8. How do students login, complete and submit Wizer worksheets? 1. Google Classroom: Click on link. 2. Link: Click on link, sign in using G+ or name/password 3. PIN: Go to https://app.wizer.me/learn/, enter PIN worksheet PIN. 9. Can I use Wizer with Google Classroom? Yes. Wizer is integrated with Google Classroom and Wizer worksheets can be assigned to students directly via the green Google Classroom link. The first time you assign a Wizer worksheet via Google Classroom you will be asked to confirm your connection with a few simple steps. 10. Can I use Wizer with Haiku? Yes. If your school uses Haiku digital learning platform you can create or use Wizer worksheets, then copy the worksheet link into your classroom pages. 11. Can I use Wizer with Moodle? Yes. If your school uses Moodle open source learning platform you can paste worksheet links directly into class assignments. 12. What kind of multimedia resources can I use in Wizer worksheets? You can easily add video, audio and images to any Wizer worksheet. Images can be made interactive using the Fill on an Image question type. 13. What kinds of questions can I make with Wizer? Wizer question types: Open answer, multiple choice, matching, fill in the blank, fill on an image and tables. Full Article Blended Learning CTE Education Instruction Online Learning Technology Web 2.0 YouTube
for Auxiliary DC power system used for fault detection, trip coils and remote operation By electrical-engineering-portal.com Published On :: Mon, 20 Nov 2023 08:07:53 +0000 The auxiliary DC control power system is considered the most crucial element of a protection, control, and monitoring system. The failure of the direct current (DC) control power can result in the inability of fault detection devices to identify faults,... Read more The post Auxiliary DC power system used for fault detection, trip coils and remote operation appeared first on EEP - Electrical Engineering Portal. Full Article Energy and Power Low Voltage Power Substation Protection auxiliary dc power system auxiliary direct current battery battery charger battery fuse battery types battery-based system charging system control and protection systems dc distribution system dc power dual dc auxiliary supply system fault detection nickel-cadmium batteries switch transfer trip coils uninterruptible power supply ups vrla
for Twelve ultimate mistakes when selecting circuit protection for low-voltage equipment By electrical-engineering-portal.com Published On :: Mon, 08 Jan 2024 08:26:38 +0000 To be honest, a circuit breaker is fairly simple device. However, the process of specifying circuit protection is often complicated and unclear, leading many engineers to either include insufficient or excessive protection in their equipment designs. Insufficiently protected circuits expose... Read more The post Twelve ultimate mistakes when selecting circuit protection for low-voltage equipment appeared first on EEP - Electrical Engineering Portal. Full Article Energy and Power Low Voltage Power Substation Protection breaker breaker interrupting capacity cb rating circuit breaker circuit protection excessive heating fuse in-rush current ip protection degree low-voltage equipment magnetic circuit breakers nuisance tripping over specifying switch terminal thermal-magnetic circuit breakers transient current tripping withstand voltage
for The magic that isolation transformer uses to suppress transients and noise By electrical-engineering-portal.com Published On :: Wed, 21 Jul 2021 07:25:00 +0000 Transformers are not perfect. Transients and noise (radio-frequency and low-level spikes) normally pass through transformers, not only by way of the magnetic lines of flux between the primary and the secondary windings but through resistive and capacitive paths between the... Read more The post The magic that isolation transformer uses to suppress transients and noise appeared first on EEP - Electrical Engineering Portal. Full Article Energy and Power Power Quality Transformers autotransformer electrostatic shield isolation transformer noise attenuation noise signals power supply primary windings secondary windings shielding tap-changing voltage regulator transformer coil transients Variable ratio voltage regulator variable voltage transformer
for Let’s develop the simple PLC program for lighting control system By electrical-engineering-portal.com Published On :: Mon, 06 Jul 2015 04:05:36 +0000 A lighting control system is to be developed. The system will be controlled by four switches, SWITCH1, SWITCH2, SWITCH3, and SWITCH4. These switches will control the lighting in a room based on the following criteria: Any of three of the... Read more The post Let’s develop the simple PLC program for lighting control system appeared first on EEP - Electrical Engineering Portal. Full Article Industrial Automation Lighting ladder diagram lighting control system master control switch plc plc program switch wiring diagram
for 31 Common Household Circuit Wirings You Can Use For Your Home (3) By electrical-engineering-portal.com Published On :: Tue, 14 Jun 2016 21:33:55 +0000 1st part | 2nd part | 3rd part The list of the last eleven household circuit wirings: Three-way switches & light fixture (fixture at start of cable run) Three-way switches & light fixture (fixture at end of cable run) Three-way... Read more The post 31 Common Household Circuit Wirings You Can Use For Your Home (3) appeared first on EEP - Electrical Engineering Portal. Full Article Energy and Power Lighting Low Voltage cable run circuit wiring end of cable fourway switch light light fixture light fixtures switches threeway switches
for 31 Common Household Circuit Wirings You Can Use For Your Home (2) By electrical-engineering-portal.com Published On :: Tue, 14 Jun 2016 21:34:01 +0000 1st part | 2nd part | 3rd part The list of the next ten household circuit wirings: Double receptacle circuit with shared neutral wire (receptacles alternate circuits) Double receptacle small-appliance circuit with GFCIs & shared neutral wire Double receptacle small... Read more The post 31 Common Household Circuit Wirings You Can Use For Your Home (2) appeared first on EEP - Electrical Engineering Portal. Full Article Energy and Power Lighting Low Voltage appliance circuit cable circuit wirings double receptacle gfci light fixture neutral wire shared neutral switches
for 31 Common Household Circuit Wirings You Can Use For Your Home By electrical-engineering-portal.com Published On :: Tue, 14 Jun 2016 21:34:06 +0000 The circuit wirings in this article show the most common wiring variations for typical electrical devices. Most new wiring you install will match one or more of the wirings shown. Find the wirings that match your situation and use them to... Read more The post 31 Common Household Circuit Wirings You Can Use For Your Home appeared first on EEP - Electrical Engineering Portal. Full Article Energy and Power Lighting Low Voltage cable run circuit circuit wirings duplex receptacle light fixture receptacle receptacle switch single-pole switch switch
for How to write informal IELTS letters By www.usingenglish.com Published On :: Tue, 02 Jul 2024 01:54:11 +0000 New Articles Entry: 'How to write informal IELTS letters' has just been added to the Articles area of UsingEnglish.com. Full Article
for Aim for By www.usingenglish.com Published On :: Tue, 02 Jul 2024 10:48:46 +0000 New Phrasal Verbs Entry: 'Aim for' has just been added to the Phrasal Verbs area of UsingEnglish.com. Full Article
for 9 IELTS Informal Letter Model Answers By www.usingenglish.com Published On :: Mon, 15 Jul 2024 22:34:55 +0000 New Articles Entry: '9 IELTS Informal Letter Model Answers' has just been added to the Articles area of UsingEnglish.com. Full Article
for Passive voice key word sentence transformations By www.usingenglish.com Published On :: Sun, 11 Aug 2024 07:13:14 +0000 New Lesson Plans Entry: 'Passive voice key word sentence transformations' has just been added to the Lesson Plans area of UsingEnglish.com. Full Article
for How to write formal IELTS General Writing Task 1 letters By www.usingenglish.com Published On :: Sun, 11 Aug 2024 07:19:44 +0000 New Articles Entry: 'How to write formal IELTS General Writing Task 1 letters' has just been added to the Articles area of UsingEnglish.com. Full Article
for Analysis of official IELTS formal letter tasks By www.usingenglish.com Published On :: Mon, 16 Sep 2024 01:20:36 +0000 New Articles Entry: 'Analysis of official IELTS formal letter tasks' has just been added to the Articles area of UsingEnglish.com. Full Article
for MV/HV switchgear (circuit breaker) switching capability and suitability for specific applications By electrical-engineering-portal.com Published On :: Mon, 26 Jul 2021 06:56:29 +0000 Circuit breakers (CBs) do interrupt fault currents and close onto faults. Besides, they could be used as isolation devices like disconnectors. The CBs manufacturers’ brochures and standards provide extensive data to select and assess the CBs performance, but designers must... Read more The post MV/HV switchgear (circuit breaker) switching capability and suitability for specific applications appeared first on EEP - Electrical Engineering Portal. Full Article High Voltage Medium Voltage Power Substation Premium Content Protection air-blast breakers capacitive current switching circuit breaker circuit breakers current chopping endurance classes multiple pre-striking oil circuit breakers re-ignition sf6 gas circuit breakers switching duty switching frequency switching inductive currents vacuum circuit breakers
for Eleven most important calculations you can perform with power system analysis software By electrical-engineering-portal.com Published On :: Mon, 21 Aug 2023 06:25:23 +0000 This technical article we will go through a number of existing applications for conducting a wide range of electrical studies. However, the practice says that studies involving load flow and fault analyses are the most commonly utilized programs in power transmission... Read more The post Eleven most important calculations you can perform with power system analysis software appeared first on EEP - Electrical Engineering Portal. Full Article High Voltage Power Substation Protection Transmission and Distribution arc flash study available fault current cross sectional area earthing fast transients fault current fault-analysis feeder sizing load flow load flow analysis load flow study power flow power quality analysis power system analysis power system analysis software protection schemes steady-state transformer sizing transient stability voltage drop
for Fundamental concepts of schematic drawings for true field engineers (hands on HV schemes) By electrical-engineering-portal.com Published On :: Mon, 11 Dec 2023 07:18:24 +0000 Schematic drawings, also known as electrical or circuit diagrams, are essential tools for understanding and designing electrical circuits. Mastering schematic drawing is a fundamental skill for field engineers, allowing them to effectively troubleshoot, maintain, and modify electrical schemes. This technical... Read more The post Fundamental concepts of schematic drawings for true field engineers (hands on HV schemes) appeared first on EEP - Electrical Engineering Portal. Full Article High Voltage Power Substation Premium Content Protection 132kV power substation 132kv substation ansi code busbar circuit breaker circuit diagrams current transformer drawing number earthing switch electrical circuits electrical elements external wiring isolator panel name revision number schematic drawings single line diagram switchgear transformer feeder voltage transformer
for A roadmap for engineers seeking mastery in the language of electrical schematics By electrical-engineering-portal.com Published On :: Wed, 03 Jan 2024 11:16:11 +0000 In the intricate landscape of electrical engineering, the ability to decipher and interpret schematic drawings is a skill that separates the adept from the novice. This technical article delves into the art of understanding schematics, unraveling the complexities through a... Read more The post A roadmap for engineers seeking mastery in the language of electrical schematics appeared first on EEP - Electrical Engineering Portal. Full Article High Voltage Power Substation Premium Content Protection auxiliary contacts auxiliary relays circuit breaker coil saving contacts early break and late break contact early make contact electrical schematics interlock circuits late make auxiliary contact limit switches magnetic contactors multi position switch normally closed contact normally open contact power contacts tripping and closing coils voltage transformer circuit
for 11 factors that significantly influence the transformer price (Be careful when specifying) By electrical-engineering-portal.com Published On :: Mon, 18 Sep 2023 06:41:12 +0000 The majority of utilities are normally extremely well aware of the economic aspects and savings that can be obtained at all stages of the transformer’s life cycle. This is because the purchase of a transformer involves a very high capital... Read more The post 11 factors that significantly influence the transformer price (Be careful when specifying) appeared first on EEP - Electrical Engineering Portal. Full Article Energy and Power Protection Transformers Transmission and Distribution auxiliary equipment bushings cts de-energized tap changer detc environmental conditions insulation coordination insulation level load losses mva size no-load losses oltc on-load tap-changers overloading capability special transformer tests star/star transformers tap changers tertiary stabilizing winding transformer handbook transformer life expectancy transformer losses transformer price winding configurations
for Mastering stability test of power transformer: Differential and Restricted Earth Fault (REF) protection By electrical-engineering-portal.com Published On :: Mon, 25 Sep 2023 05:55:16 +0000 This technical article discusses the essentials of transformer differential protection and restricted earth fault protection schemes, contrasting the two and elaborating on why the latter is necessary. Furthermore, it reveals the outcomes of stability tests performed on a 502 MVA... Read more The post Mastering stability test of power transformer: Differential and Restricted Earth Fault (REF) protection appeared first on EEP - Electrical Engineering Portal. Full Article Premium Content Protection Testing and Commissioning Transformers differential protection differential protection scheme failure fault hv windings injecting fault lv side primary current lv side secondary current lv windings measured primary currents measured secondary currents ref ref protection restricted earth fault protection stability test stable condition transformer differential protection transformer restricted earth fault protection tv windings unit protection scheme unstable condition
for Contract drawings for a power transformer – The checklist you should always follow By electrical-engineering-portal.com Published On :: Mon, 04 Dec 2023 08:39:02 +0000 This technical article provides a collection of the common drawings that are sent by the manufacturer to the client for approval and reference. The goal of these drawings is to verify that the transformers that are going to be manufactured... Read more The post Contract drawings for a power transformer – The checklist you should always follow appeared first on EEP - Electrical Engineering Portal. Full Article Power Substation Premium Content Protection Transformers alarm scheme arrangement drawing bill of materials bushings checklist contract drawings control scheme control selector switches cooler control cubicle diagram plate foundation plan indication circuit diagram junction box marshalling box on-load tap changer overload protection power transformer rtcc panel tap changer control schemes tripping scheme voltage regulating
for Transformers in plant power distribution: The bigger picture By electrical-engineering-portal.com Published On :: Mon, 04 Mar 2024 06:10:41 +0000 This technical article provides an overview of the various choices and assists electrical engineers in determining the criteria that should be included in the transformer specifications in order to meet the requirements of their particular application. A power plant often... Read more The post Transformers in plant power distribution: The bigger picture appeared first on EEP - Electrical Engineering Portal. Full Article Energy and Power Power Substation Transformers autotransformer auxiliary losses delta-delta delta-star insulation class load losses no-load losses off-load tap changer oil tank on-load tap changer phase shift power distribution power plant sta-delta star star tap changers temperature rise transformer cooling transformer dielectric test transformer impedance transformer losses transformer phase markings transformer winding configurations turns ratio zigzag
for What steps should be taken to avoid choosing the incorrect current and voltage transformers? By electrical-engineering-portal.com Published On :: Mon, 18 Mar 2024 07:14:36 +0000 Electrical systems normally use current and voltage transformers for protection and measurement purposes. They represent the power system’s eyes and ears, and it’s essential to fully understand how they work, how to make the correct specification and most importantly, the... Read more The post What steps should be taken to avoid choosing the incorrect current and voltage transformers? appeared first on EEP - Electrical Engineering Portal. Full Article Power Substation Protection Testing and Commissioning Transformers accuracy class ct burden ct polarity ct theory book cts current transformer differential protection differential relay digital numerical relays iec 61869-1 instrument transformers metering accuracy class metering cts multiple ratio taps multiratio cts polarity indications voltage transformers vt burden vt polarity vts
for Guidelines for selecting the proper Variable Frequency Drive (VFD) for motor applications By electrical-engineering-portal.com Published On :: Mon, 28 Jun 2021 06:02:24 +0000 This article addresses the Variable Frequency Drive (VFD) concept in several aspects that matter the most in selecting the proper VFD for applications. One of the important factors is the control type required for a given application since it is... Read more The post Guidelines for selecting the proper Variable Frequency Drive (VFD) for motor applications appeared first on EEP - Electrical Engineering Portal. Full Article Electric Motor Premium Content Variable Speed Drives bearing current direct torque control dV/dt harmonics insulation inverter motor motor terminals phasor-controlled drive switching frequency v/f control variable frequency drive vfd vfd control vfd grounding
for An Overview of IEC 60076-10 – Determination Of Sound Levels Of Power Transformers By electrical-engineering-portal.com Published On :: Wed, 14 Aug 2013 04:27:39 +0000 The audible sound radiated by transformers is generated by a combination of magnetostrictive deformation of the core and electromagnetic forces in the windings, tank walls and magnetic shields. Historically, the sound generated by the magnetic field inducing longitudinal vibrations in the... Read more The post An Overview of IEC 60076-10 – Determination Of Sound Levels Of Power Transformers appeared first on EEP - Electrical Engineering Portal. Full Article IEC Standards Transformers electromagnetic forces reactor sound intensity sound power sound pressure transformer vibrations windings
for Jet pumps used for private well systems or low flow irrigation applications By electrical-engineering-portal.com Published On :: Mon, 12 Aug 2013 04:03:59 +0000 Jet Pumps are mounted above ground and lift the water out of the ground through a suction pipe. Jets are popular in areas with high water tables and warmer climates. There are two categories of jet pumps and pump selection... Read more The post Jet pumps used for private well systems or low flow irrigation applications appeared first on EEP - Electrical Engineering Portal. Full Article HVAC Industrial Automation centrifugal pump deep-well jet pump jet ejector jet pumps pump shallow-well jet pump venturi water level
for Tips For Successful Energy Efficiency Of Centrifugal Water Chillers By electrical-engineering-portal.com Published On :: Mon, 30 May 2016 04:11:36 +0000 Centrifugal water chillers comprise a significant portion of industrial and large commercial electrical load. These machines are efficient, typically producing a cooling effect two-to-three times greater than the required energy input. Centrifugal water systems were the focus of cholorfluorocarbon (CFC)... Read more The post Tips For Successful Energy Efficiency Of Centrifugal Water Chillers appeared first on EEP - Electrical Engineering Portal. Full Article Energy Efficiency HVAC centrifugal water chillers compressor power consumption condenser condenser water temperature efficiency curve energy efficiency water temperature
for Learn how to use PLC and VFD for pump control: Power and control circuits analysis By electrical-engineering-portal.com Published On :: Wed, 27 Nov 2019 11:21:39 +0000 For the last several decades, every engineering task related to processing control is realized by the use of PLC (Programmable Logic Controller). If we are talking about induction motor control, which is the most common case, usually a VFD (Variable... Read more The post Learn how to use PLC and VFD for pump control: Power and control circuits analysis appeared first on EEP - Electrical Engineering Portal. Full Article Electric Motor Industrial Automation Premium Content automation cubicle auxiliary relay mcc motor control plc plc binary inputs pump control submersible pump temperature protection variable frequency drive vfd
for Soft starter for potable water well pump (wiring diagram, troubleshooting example) By electrical-engineering-portal.com Published On :: Fri, 27 Dec 2019 11:28:42 +0000 This article will analyze a real example of an electrical switchboard for a potable water well pump, containing a soft starter as one of the major components. Besides the explanation of the wiring diagram and working logic, some technical problems... Read more The post Soft starter for potable water well pump (wiring diagram, troubleshooting example) appeared first on EEP - Electrical Engineering Portal. Full Article Industrial Automation Low Voltage Premium Content bypass contactor control voltage high inrush motor motor thermal protection potable water well pump soft start soft starter soft stop ups device wiring diagram
for Design and control considerations for an example of the waste water pumping station By electrical-engineering-portal.com Published On :: Fri, 14 Feb 2020 12:39:48 +0000 Wastewater pumping stations are very common application examples of three-phase induction motors. There are numerous varieties of power supply and control logic, depending on exact conditions in the place of installation, the role of the pumping station inside a sewer... Read more The post Design and control considerations for an example of the waste water pumping station appeared first on EEP - Electrical Engineering Portal. Full Article Energy and Power Industrial Automation Premium Content capacitor switching circuit breaker control logic level switch plc power supply power supply source pumping station soft starter waste water pumping stations
for The Honeydogs: A Retail Solution For Heartbreak By www.npr.org Published On :: Mon, 04 Jun 2012 07:00:00 -0400 The hook in "Broke It, Buy It" is insidiously catchy enough to ricochet through your head for days. Levy concludes with the implication that our inability to accept our failings causes more unhappiness than the failures themselves as we chase retail solutions — "we broke it, so we buy it." Full Article
for Capacitive Voltage Transformers (CVT) For HV Measurements By electrical-engineering-portal.com Published On :: Sat, 26 Dec 2015 06:41:01 +0000 Capacitive voltage transformers (CVTs) are used on higher voltage levels, starting from 66 kV and upwards. The type of the CVT is always a single-pole one, thus the connection is between phase and earth. The higher the voltage level is,... Read more The post Capacitive Voltage Transformers (CVT) For HV Measurements appeared first on EEP - Electrical Engineering Portal. Full Article High Voltage Instrumentation Metering capacitance capacitive voltage transformers ferroresonance inductance power line carrier voltage divider voltage transformer
for Daily Warm-Up 34 for Gr. 1 & 2: American History By www.teachervision.com Published On :: 2016-12-31T08:00 The printable daily warm-up helps students master important reading skills with a passage on American history and reading comprehension questions about Betsy Ross. Full Article
for Electrical engineering for hydropower, from run-of-river to pumped storage plants By electrical-engineering-portal.com Published On :: Mon, 13 Jun 2022 05:10:51 +0000 Nowadays, when we all see and feel the colossal crisis looming on the horizon, the question of energy security is among the first things on the table in each country’s management. It’s now essential more than ever for each country... Read more The post Electrical engineering for hydropower, from run-of-river to pumped storage plants appeared first on EEP - Electrical Engineering Portal. Full Article Energy and Power Energy Generation Hydropower Premium Content air insulated switchgear hydropower hydropower generation scheme hydropower plants kaplan motor control center pelton pumped storage plants rotor geometry step down transformer turbogenerators
for How to control and protect capacitor banks before something goes wrong By electrical-engineering-portal.com Published On :: Wed, 24 Jan 2018 07:06:20 +0000 The purpose of a capacitor bank’s protective control is to remove the bank from service before any units or any of the elements that make up a capacitor unit are exposed to more than 110% of their voltage rating. When... Read more The post How to control and protect capacitor banks before something goes wrong appeared first on EEP - Electrical Engineering Portal. Full Article Energy and Power Monitoring Protection capacitor bank capacitor unit grounded banks grounded neutral neutral current protect capacitor protection scheme voltage unbalance
for Isolation power solutions for ultimate power availability, efficiency and safety in hospitals By electrical-engineering-portal.com Published On :: Wed, 04 Aug 2021 20:43:25 +0000 Things are changing fast, really fast. Technology we used a few years ago is now obsolete, and if you take a look for a second – it’s always about power availability, efficiency, and safety. This technical article deals with Schneider... Read more The post Isolation power solutions for ultimate power availability, efficiency and safety in hospitals appeared first on EEP - Electrical Engineering Portal. Full Article Energy and Power Energy Efficiency Monitoring Protection ecostruxure power management software electrical fault detection electrical outlets healthcare facilities insulation monitoring isolation power solutions isolation transformer monitoring medical outlets myschneider panel builders operating rooms panel builders power availability schneider electric transformer overheating transformer overload unplanned downtime ups status
for Forum- Passwords & Personal Data By www.usingenglish.com Published On :: Fri, 27 Sep 2013 12:48:04 +0000 After we changed everyone's passwords a couple of weeks ago, people were asking some questions about passwords and personal data. Firstly, we don't hold much personal data- as people have usernames, we don't know real names. We do ask for the year and date of birth to comply with the Children's Online Privacy Protection Act (COPPA). We ask for an active email account and send a link that has to be clicked on to complete the registration. This is to make it harder for automated registration by advertisers and spammers. We also ask where you're from, where you are based now and what your first language is. There are also optional fields where people can add biographical information and interests if they wish. Unless you use your real name as a username or connect via Facebook, the data is anonymous. If an acount is deleted, this information is deleted from our records. Full Article UsingEnglish Content forum
for Family-Friendly Forum By www.usingenglish.com Published On :: Sun, 16 Nov 2014 15:31:40 +0000 I have had a few complaints about swearing in the forum, even though the posts were legitimate questions about the use of slang and swearwords. There aren't that many threads dealing with these, but some of them do contain language that somewould consider to be extreme and taboo. Full Article Editorial Policies UsingEnglish Content forum policies
for Forum Policies- Cross-Forum Posting By www.usingenglish.com Published On :: Thu, 28 May 2015 11:57:03 +0000 Quite a lot of people post the same question in a number of ESL forums. The logic behind doing this is clear- you should be able to access a wider selection fof views and opinions and get better answers. However, things don't always work out the way people think and this process can lead to objections from the people answering. Full Article Editorial Policies UsingEnglish Content
for Access to the forum from South Korea By www.usingenglish.com Published On :: Tue, 07 Jul 2015 15:46:19 +0000 A couple of weeks ago, we blocked access to the forum from all IPs from South Korea. The forum had been under attack by some organised spammers for a few weeks, and it was ruining the forum. The attack was, presumably, using something like a botnet as there was a seemingly unending supply of different IPs used. Day after day, hundreds and hundreds of posts were being made and it was impossible to keep up with deleting and banning the accounts posting the spam. This was affecting the forum- people were complaining, and many were simply put off by finding page after page of nonsensical messages. The spam filter was not catching a lot of the messages as most didn't contain links but text pointing towards sites that were probably full of malware. Full Article Asian Blog forum
for ATS Schematics and Logic Analysis for a Substation 415V AC Auxiliary Supply Panel By electrical-engineering-portal.com Published On :: Mon, 03 Jun 2024 04:54:43 +0000 In modern electrical power systems, ensuring a reliable and continuous supply of electricity is critical, particularly in facilities where downtime can result in significant operational disruptions and financial losses. Low voltage automatic transfer schemes at substations play a vital role... Read more The post ATS Schematics and Logic Analysis for a Substation 415V AC Auxiliary Supply Panel appeared first on EEP - Electrical Engineering Portal. Full Article Energy and Power Power Substation Premium Content Protection 250kva diesel generator ac supply ats schematics auto transfer scheme automatic operation automatic transfer schemes auxiliary supply panel auxiliary transformer supply backup power bus coupler circuit breaker diesel generator supply incoming panel interlocking low voltage substation manual operation power distribution single line diagram substation supply incoming panel
for Handy earthing guidelines for true engineers By electrical-engineering-portal.com Published On :: Mon, 29 Jul 2024 03:44:00 +0000 In the world of electrical engineering, ensuring the safety and reliability of power systems is paramount. A critical aspect of this is the proper implementation of earthing and bonding systems. This article delves into the fundamental concepts and applications of... Read more The post Handy earthing guidelines for true engineers appeared first on EEP - Electrical Engineering Portal. Full Article Energy and Power Power Substation Premium Content Protection bonding bonding conductors earthing electric shock electrical equipment electrical installations equipotential bonding equipotential earthing mats fault currents functional earthing ground connection grounding grounding system mcb protective earthing temporary earthing
