con Progress 2025: A Vision for Economic Justice By www.yesmagazine.org Published On :: Thu, 19 Sep 2024 14:00:00 +0000 A progressive alternative to Project 2025’s anti-tax, anti-worker economy includes worker protections and a strong social safety net. Full Article Economy Wealth and inequality Jobs Organized Labor Project 2025 Progress 2025: Labor and Capital Progress 2025 Gig Work Americans for Financial Reform Unions YES! Presents: Rising Up with Sonali
con Can Connection Be the Cure for What Ails Us? By www.yesmagazine.org Published On :: Thu, 27 Jun 2024 14:00:00 +0000 What if in addition to prescribing medication, doctors also prescribed activities that addressed our lack of connection? Full Article Health & Happiness Mental health Health care Medication Mental Health Health Care YES! Presents: Rising Up with Sonali Julia Hotz The Connection Cure
con Top Ten Health Books That Changed My Life — The Healthy Home Economist By www.thehealthyhomeeconomist.com Published On :: 2011-12-21T08:00:06-08:00 this really is a good list of books Full Article
con Bacon and Apple Stuffed Pork Chops | Paleo Parents By paleoparents.com Published On :: 2012-01-13T21:23:04-08:00 We made this a few nights ago and it kicked ass. Full Article
con Clean-up continues in Spain after shock floods cause chaos By www.bbc.com Published On :: Fri, 01 Nov 2024 08:03:39 GMT Families have had to leave their homes and emergency services are helping people as they deal with the impact of the worst flooding in the country for many years. Full Article
con Why was John concerned to be perfect, ... By www.usingenglish.com Published On :: Wed, 02 Oct 2024 07:05:06 +0000 Full Article Ask a Teacher
con Wisconsin Library Services (WiLS) By ischoolapps.sjsu.edu Published On :: Tuesday, November 12, 2024 12:14 pm Digitization Intern (Madison--onsite) Full Article
con Teachermate -Handheld Console for Educational Games By www.usingenglish.com Published On :: Fri, 30 May 2008 01:56:58 +0000 An Illinois, non-profit organisation called Innovations for Learning has released a handheld cosole, like a Game Boy or Nintendo DS designed for education and targeted at kindergarten and elementary students. Despite its simplicity and lack of software, this device has a lot of potential for English language education. Full Article General Topics
con Easily Confused Words (10 questions) By www.usingenglish.com Published On :: Mon, 21 Sep 2015 15:19:00 +0000 Title: Easily Confused WordsTopic: VocabularyLevel: AdvancedInformation: Choose the correct answer.Link: https://www.usingenglish.com/quizzes/585.html Full Article
con The problem of induced voltages in control cables in high voltage substations By electrical-engineering-portal.com Published On :: Mon, 13 Jan 2020 07:53:49 +0000 Cabling in power substations is very important due to the fact that they are the longest parts of a system and therefore act as efficient antennas that pickup and or radiate noise. In HV substations, there are different kinds of conductors... Read more The post The problem of induced voltages in control cables in high voltage substations appeared first on EEP - Electrical Engineering Portal. Full Article Cables High Voltage Power Substation capacitive coupling circuit breaker circuit breaker operations control cable control cables electric field induced voltage induced voltages inductive coupling power conductor switching transients
con The art of determining the right cross-section of low voltage conductors By electrical-engineering-portal.com Published On :: Mon, 16 Mar 2020 06:18:58 +0000 To be clear at the beginning of this article, determining the cross-section of conductors and cables is, for sure, not the most exciting part of electrical design. There are much more challenging and more exciting parts than staring at endless... Read more The post The art of determining the right cross-section of low voltage conductors appeared first on EEP - Electrical Engineering Portal. Full Article Cables Energy and Power Protection cables conductors correction factors cross-section current carrying capacity ground iec 60364-5-52 installation methods loaded conductors multi core cables parallel conductors reduction factors single core cables wiring systems
con Dos, don’ts and precautions in wiring cables and conductors inside low-voltage switchboard By electrical-engineering-portal.com Published On :: Mon, 26 Apr 2021 06:33:13 +0000 To be clear from the very beginning of this article, there is no standard model for wiring low voltage switchboards and panelboards. However, for the wide variety of installations and ranges of power ratings, there are local work practices, regulations... Read more The post Dos, don’ts and precautions in wiring cables and conductors inside low-voltage switchboard appeared first on EEP - Electrical Engineering Portal. Full Article Cables Energy and Power Low Voltage Protection aluminium core conductors cross sections electrodynamic effects electrolytic corrosion flexible copper core horizontal trunking low voltage switchboard magnetic effects minimum cross-sections protective conductors rigid copper core switchboard wiring conductors wiring precautions
con 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
con Twelve high voltage cable construction techniques used worldwide By electrical-engineering-portal.com Published On :: Mon, 29 Apr 2024 06:18:58 +0000 This technical article discusses twelve different methods for laying high voltage cables. Out of the ten, four are deemed conventional and eight are deemed progressive. Many various utilities and companies all across the globe are making use of them, though... Read more The post Twelve high voltage cable construction techniques used worldwide appeared first on EEP - Electrical Engineering Portal. Full Article Cables Energy and Power Transmission and Distribution cable ducts cable laying cable shafts cable trenches cable tunnels concrete direct burial duct banks excavation ground surface high voltage cable high voltage cable construction techniques horizontal drilling laying cables laying high voltage cables microtunneling microtunnels pipe jacking polyethylene pvc
con GE to sell part of its nuclear business to EDF, which aims to ramp up construction By www.power-eng.com Published On :: Thu, 10 Feb 2022 20:59:57 +0000 GE and EDF signed an exclusive agreement for EDF to acquire part of GE Steam Power’s nuclear power business. Full Article News Nuclear Reactors EDF General Electric
con Family, data and power generation: A conversation with CPS Energy’s Melanie Green By www.power-eng.com Published On :: Fri, 11 Feb 2022 13:00:00 +0000 Melanie Green is currently Sr. Director of Power Generation at CPS Energy in San Antonio, Texas. Full Article Featured News CPS Energy
con Google Contact Lens? By careertechtesting.blogspot.com Published On :: Tue, 22 Apr 2014 05:11:00 +0000 Google Glass I'm sure you have all heard about Google Glass, but if not, Google Glass is a wearable computer with an optical head-mounted display (OHMD). Google's intention is to produce a mass-market ubiquitous computer (advanced computing concept where computing is made to appear everywhere and anywhere) that displays information in a smartphone-like hands-free format and wearers communicate with the Internet via voice commands. The new Google lens? But if you think Google Glass is cool, wait until you read about Google's newest patent application. Google has devised a way to shrink Google Glass into a single contact lens. The user will control its application with a series of unique blinking patterns. The Yahoo article mentions that the new lens could have significant application for the blind which is incredible, but as with most technology, applications will be discovered after production. I also think that both of these products could be beneficial to career and technical education and to business and industry. For example, an automotive technician could search for help while repairing a vehicle, take notes, or take a picture and/or video and send it to ask for assistance. What are your thoughts on applications for CTE? Full Article CareerTechEd Technology
con Controlling power system parameters through reactive power (VAr) compensation By electrical-engineering-portal.com Published On :: Mon, 17 Feb 2020 08:02:41 +0000 To be honest, transmission and distribution networks are full of problems. But that’s nothing new, and you already knew that. This technical article will shed some light on solving some pretty severe problems in transmission and distribution networks by using... Read more The post Controlling power system parameters through reactive power (VAr) compensation appeared first on EEP - Electrical Engineering Portal. Full Article Energy and Power Power Quality Transmission and Distribution arc furnace electric welding harmonic currents harmonic filters power supply reactive power reactive var control saturated reactor type compensator shunt capacitance shunt capacitor banks statcom static var compensators thyristor controlled reactor thyristor switched capacitors
con Six methods to control the flow of harmonic currents and decrease harmonic distortion limits By electrical-engineering-portal.com Published On :: Mon, 19 Jul 2021 06:37:34 +0000 The first technique to control harmonic-related problems in the industry involved substantial use of single-tuned filters to offer a low-impedance path to harmonic currents. Interestingly, it is not difficult to find harmonic-producing loads in the megavolt-ampere range in the industry... Read more The post Six methods to control the flow of harmonic currents and decrease harmonic distortion limits appeared first on EEP - Electrical Engineering Portal. Full Article Electric Motor Energy and Power Power Quality Protection 12-pulse converters harmonic currents harmonic distortion harmonic filters harmonics motors phase balancing phase load balancing phase-shift transformer series reactors short circuit current unbalanced phase voltage
con 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
con Connected speech in Financial English collocations By www.usingenglish.com Published On :: Thu, 25 Jul 2024 01:27:02 +0000 New Lesson Plans Entry: 'Connected speech in Financial English collocations' has just been added to the Lesson Plans area of UsingEnglish.com. Full Article
con Requests in conversation practice By www.usingenglish.com Published On :: Wed, 25 Sep 2024 02:09:01 +0000 New Lesson Plans Entry: 'Requests in conversation practice' has just been added to the Lesson Plans area of UsingEnglish.com. Full Article
con Good practice in the design of concrete and steel structures in power substations By electrical-engineering-portal.com Published On :: Mon, 26 Jun 2023 06:09:02 +0000 The process of designing a substation usually begins with the general substation layout, which is dependent on the required safety clearance and insulation withstand, as well as the permissible loads delivered to substation equipment and structures. The permissible loads, in... Read more The post Good practice in the design of concrete and steel structures in power substations appeared first on EEP - Electrical Engineering Portal. Full Article High Voltage Power Substation Transformers Transmission and Distribution ais anchor bolts batteries cable trenches chemical anchors civil works concrete slab control and power cables design guidelines foundations generators maintenance oil containment reinforced concrete substation buildings transformer foundation transformer oil leaking transformers
con 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
con Fundamental concepts of schematic drawings: Going deeper into analysis and design intricacies By electrical-engineering-portal.com Published On :: Mon, 25 Dec 2023 08:03:30 +0000 Welcome to this comprehensive technical article that delves into the intricacies of electrical schematics, shedding light on crucial elements such as loops, wire connections, auxiliary contacts, MCBs, contactors, circuit breakers, isolators, earth switches, and terminal blocks. In the world of... Read more The post Fundamental concepts of schematic drawings: Going deeper into analysis and design intricacies appeared first on EEP - Electrical Engineering Portal. Full Article High Voltage Power Substation Premium Content Protection auxiliary contacts auxiliary relays circuit breaker notation circuit breakers contactors earth switches electrical schematic design isolators loop supply supervision relay loop wiring mcbs normally closed contact normally open contact schematic drawing schematic drawings schematics terminal blocks wire connections
con 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
con Inside Variable Frequency Drive (VFD) Panel: Configuration, Schematics and Troubleshooting By electrical-engineering-portal.com Published On :: Mon, 25 Jul 2022 04:11:18 +0000 Proper analysis of the VFD’s power and control circuit diagrams is essential for successful troubleshooting. But before starting any analysis, you must know how your system connected through VFD works and how it breathes. You must also know all components... Read more The post Inside Variable Frequency Drive (VFD) Panel: Configuration, Schematics and Troubleshooting appeared first on EEP - Electrical Engineering Portal. Full Article Premium Content Testing and Commissioning Variable Speed Drives ac motor bms fire alarm motor drive motor nameplate motor speed output frequency smoke extraction fan speed frequency variable frequency drive vfd vfd control circuit vfd control circuit diagram vfd panel vfd parameters vfd power circuit diagram vfd testing vfds volts per hertz
con IEC 62271-200 – HV Switchgear And Controlgear By electrical-engineering-portal.com Published On :: Thu, 09 Dec 2010 13:00:22 +0000 Part 200: AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV Switchgears are important nodal points in modern power distribution. Correspondingly important is their reliable functioning, a clearly defined switching behavior... Read more The post IEC 62271-200 – HV Switchgear And Controlgear appeared first on EEP - Electrical Engineering Portal. Full Article High Voltage IEC Standards controlgear dielectric earthing switch hv switchgear iec 62271-200 metal-clad metal-enclosed partitition siemens
con Low voltage ride through in grid connected hybrid renewable energy systems By electrical-engineering-portal.com Published On :: Fri, 02 Jun 2017 15:40:33 +0000 Researches so far shows that, by 2020, around 20% of the total energy production worldwide will be generated from renewable energy. But the major problem with the standalone system is that the sources are not continuous. This intermittent nature of... Read more The post Low voltage ride through in grid connected hybrid renewable energy systems appeared first on EEP - Electrical Engineering Portal. Full Article Renewable Energy Solar Power Wind Power grid-connected hybrid renewable energy low voltage ride through lvrt capability power system stability reactive power renewable energy
con Are you concerned about your privacy in Smart Grid? By electrical-engineering-portal.com Published On :: Wed, 22 May 2013 04:46:21 +0000 Modernization of the grid will increase the level of personal information detail available as well as the instances of collection, use and disclosure of personal information. Instead of measuring energy use at the end of each billing period, smart meters... Read more The post Are you concerned about your privacy in Smart Grid? appeared first on EEP - Electrical Engineering Portal. Full Article Energy and Power Smart Grid electricity grid personal information personal privacy privacy smart grid smart meters
con Conceptual Model of Smart Grid Framework by IEC By electrical-engineering-portal.com Published On :: Mon, 03 Feb 2014 05:42:28 +0000 From a communication point of view, each system plays the role of either supplier or consumer of information, or more typically both. In addition to this intersystem communication, these systems consist of subsystems with specific internal communications. The following paragraphs... Read more The post Conceptual Model of Smart Grid Framework by IEC appeared first on EEP - Electrical Engineering Portal. Full Article Energy and Power IEC Standards Smart Grid automatic control building automation distribution distribution management power grid smart consumption smart grid smart grid framework transmission
con 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
con 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
con How To Control Reactive Power In Larger Electrical Plants With Multiple Incomers By electrical-engineering-portal.com Published On :: Wed, 15 Nov 2017 08:13:28 +0000 Most compensation banks are controlled stepwise. For this purpose it is essential to ‘know’ when it is allowed to (de)activate a capacitor step by the power factor relay (controller). The so-called C/k value is calculated by the step size C... Read more The post How To Control Reactive Power In Larger Electrical Plants With Multiple Incomers appeared first on EEP - Electrical Engineering Portal. Full Article Energy and Power Monitoring Power Quality busbar compensation current transformer incoming supply power factor power factor relay reactive power summation current transformer
con 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
con Secondary equipment you should always consider when retrofitting existing HV substation By electrical-engineering-portal.com Published On :: Mon, 17 Sep 2018 05:56:37 +0000 This approach assumes retrofitting and upgrading old substation secondary equipment such as intelligent electronic devices (IEDs), monitoring sensors, power apparatus, communication protocol and operating standards to improve the overall performance or reduce cost without disrupting the continuity of service. For... Read more The post Secondary equipment you should always consider when retrofitting existing HV substation appeared first on EEP - Electrical Engineering Portal. Full Article Monitoring Power Substation Protection bus protection control house dga fiber optic cables ieds intelligent electronic devices Oil and gas monitoring devices retrofitting secondary equipment switchyard sensors transformer protection
con The true art of control, monitoring and protection provided by Substation Automation Systems By electrical-engineering-portal.com Published On :: Mon, 01 Jul 2024 06:19:46 +0000 The Substation Automation Systems, often known as SASs, are responsible for a tremendous variety of tasks. These include some extremely important actions, such as clearing faults in a timely manner in order to maintain the physical condition of power system... Read more The post The true art of control, monitoring and protection provided by Substation Automation Systems appeared first on EEP - Electrical Engineering Portal. Full Article Monitoring Power Substation Protection Substation Automation alarming messages bay controller bay level circuit breaker control disconnectors external disturbances handling events iec 61850 interlocking interlocking conditions monitoring primary switchgear protection sas sas control functions sas monitoring sas protection sf6 gas substation automation systems switching command synchrocheck transformers trip circuit supervision voltage regulation voltage synchronization
con Mastering Electrical Connectivity: From Circuit Topology to Switching Classifications By electrical-engineering-portal.com Published On :: Mon, 06 May 2024 05:12:19 +0000 This technical article aims to delve into various aspects of electrical connectivity, symbol representation, and isolation methodologies, shedding light on fundamental concepts and practical applications within the field. From the intricacies of electrical connection and circuit topology to the symbolism... Read more The post Mastering Electrical Connectivity: From Circuit Topology to Switching Classifications appeared first on EEP - Electrical Engineering Portal. Full Article Energy and Power Power Substation Premium Content Protection circuit topology disconnect switch double break isolators double-pole double-throw double-pole single-throw dpdt dpst electrical connectivity electrical contact isolation switch isolators maintenance mechanical interlock pantograph isolators shielded cables single break isolators single-pole double-throw single-pole single-throw spdt spst switching classifications testing
con Main and auxiliary circuit diagrams of switching three-phase motors via contactor and directly By electrical-engineering-portal.com Published On :: Mon, 16 May 2022 05:18:45 +0000 This technical article will try to shed some light on the main and auxiliary circuit diagrams of switching three-phase motors via contactor and switching directly. We’ll cover some fundamental schematics with an old-school explanations and logics on how they work.... Read more The post Main and auxiliary circuit diagrams of switching three-phase motors via contactor and directly appeared first on EEP - Electrical Engineering Portal. Full Article Electric Motor Energy and Power Low Voltage Power Substation 3-phase induction motors automatic sequential starting auxiliary circuit diagrams command signals contactor contactor relay direct switching drop-out delay main circuit diagram maintained-contact switch momentary-contact switch nc contact no contact overload relay switching off switching on switching three-phase motors thermostat
con How should facilities optimize their power consumption due to the hiking energy prices? By electrical-engineering-portal.com Published On :: Mon, 05 Dec 2022 06:27:57 +0000 Nowadays, the enormous energy consumption worldwide has taken a downturn due to the hiking energy prices. Whether it’s gas, oil, or coal, the rising costs forced many facilities worldwide to cut their energy expenses. This is a good moment to... Read more The post How should facilities optimize their power consumption due to the hiking energy prices? appeared first on EEP - Electrical Engineering Portal. Full Article Electric Motor Energy and Power Energy Efficiency Low Voltage centrifugal water chillers chilled water compressed air demand analysis demand controls electric motors energy consumption energy survey facility energy profile generators hiking energy prices hvac lighting control lighting system peak shaving power consumption power monitoring variable speed drives
con The essentials of pumping, pump speed and flow rate control that engineers MUST know By electrical-engineering-portal.com Published On :: Mon, 13 Mar 2023 07:33:35 +0000 Around twenty five percent of the energy that is consumed by electric motors worldwide is accounted for by pumping systems, and certain industrial facilities use anywhere from twenty-five to fifty percent of the total electrical energy available. There are significant... Read more The post The essentials of pumping, pump speed and flow rate control that engineers MUST know appeared first on EEP - Electrical Engineering Portal. Full Article Electric Motor Industrial Automation Variable Speed Drives centrifugal pump dynamic head loss flow rate friction head pd pumps pump pump characteristics pump curv pump power consumption pump tupes pumping systems reciprocating pumps rotary pumps rotating speed rotodynamic pumps throttling variable frequency drive variable speed control
con Mastering schematic drawings: Analyzing seal-in contacts in motor control circuits By electrical-engineering-portal.com Published On :: Mon, 12 Feb 2024 06:52:59 +0000 In the domain of electrical engineering, seal-in contacts stand as pivotal components in control circuits, ensuring the sustained operation of electrical devices beyond the initial activation. These mechanisms play a critical role in maintaining the energized state of circuit elements,... Read more The post Mastering schematic drawings: Analyzing seal-in contacts in motor control circuits appeared first on EEP - Electrical Engineering Portal. Full Article Electric Motor Energy and Power Industrial Automation Premium Content auxiliary relay clockwise rotation contact bouncing contactor contactor energization control circuits dc motor direction control de-energizing contactor motor control motor control circuits motor operation motor stop circuit normally closed contact normally open contact push button schematic drawings seal-in contact seal-in contacts sealing in switch
con The analysis of relay control systems: Electrical schematics with latch, step and lockout relays By electrical-engineering-portal.com Published On :: Mon, 26 Feb 2024 07:39:48 +0000 To be honest, expertise in relay systems is fundamental for comprehension and creativity in circuits design. From bi-stable relays that maintain their states without continuous power to step relays facilitating incremental changes, and lockout relays guarding against unauthorized reenergization, each... Read more The post The analysis of relay control systems: Electrical schematics with latch, step and lockout relays appeared first on EEP - Electrical Engineering Portal. Full Article Electric Motor Energy and Power Low Voltage Premium Content auxiliary relays bi-stable relay bistable relay coil activation coil energization control push button dc motor dc motor control latch relay latch state latching lock out relay master trip relay motor control circuit motor start push button resetting coil setting coil start push button step relay stepper relay stop push button
con Four special connections of current transformers in relay protection applications By electrical-engineering-portal.com Published On :: Mon, 02 Dec 2019 07:34:32 +0000 As you should already know, current transformers are used for metering and relay protection purposes. When we are talking about current transformers used for metering, their performance is of interest during normal loading conditions. Metering transformers may have very significant... Read more The post Four special connections of current transformers in relay protection applications appeared first on EEP - Electrical Engineering Portal. Full Article Metering Protection Transformers auxiliary cts ct secondary current transformers flux-summing ct primary current turns ratio zero sequence current
con The Future of MOS-Controlled Thyristor (MCT) By electrical-engineering-portal.com Published On :: Tue, 01 Jan 2013 10:17:22 +0000 The MCT is type of power semiconductor device that combines the capabilities of thyristor voltage and current with MOS gated turn-on and turn-off. It is a high power, high frequency, low conduction drop and a rugged device, which is more... Read more The post The Future of MOS-Controlled Thyristor (MCT) appeared first on EEP - Electrical Engineering Portal. Full Article Electronics high power igbt mct mos-controlled thyristor semiconductor silicon silicon carbide
con Few advice for improving integrity of protective conductor By electrical-engineering-portal.com Published On :: Fri, 14 Aug 2015 05:34:20 +0000 Most modern electronic equipment uses switched mode power supplies (SMPS) which draw pulses of current from the mains supply rather than a continuous sinusoidal current. The fast rise time edges of the current waveform contain high frequencies that can cause serious radio frequency... Read more The post Few advice for improving integrity of protective conductor appeared first on EEP - Electrical Engineering Portal. Full Article Electrical Lectures Electronics continuity test cross sectional area earth iec 7671 improving integrity leakage current protective conductor
con Switchgear interlocking system and arc protection that you MUST consider in the design By electrical-engineering-portal.com Published On :: Mon, 30 Jan 2023 06:23:26 +0000 There are at least two safety requirements that medium-voltage switchgear MUST fulfil: an interlocking system and an arc protection system. Yes, these two systems are crucial in terms of safety because they protect not only the operator and other substation... Read more The post Switchgear interlocking system and arc protection that you MUST consider in the design appeared first on EEP - Electrical Engineering Portal. Full Article Power Substation Premium Content Protection Safety arc protection auxiliary contacts bus coupler circuit breakers earth switch electrical interlocking feeder circuit breaker incomer circuit breaker incomers interlocks internal arc medium voltage normally closed auxiliary contact normally closed contact switchgear switchgear interlocking switchgear interlocking system test position
con Transformer connections you are not allowed to forget By electrical-engineering-portal.com Published On :: Wed, 20 May 2020 07:39:46 +0000 Transformers used in power substations or a power system could be a bank of three single-phase transformers connected in either star/delta or star/star etc., or could be a single three-phase transformer with a single core. Normally for large capacity transformers,... Read more The post Transformer connections you are not allowed to forget appeared first on EEP - Electrical Engineering Portal. Full Article Electrical Lectures Transformers delta-connection delta-star flux parallel operation phasor diagram secondary winding star star star-delta tertiary winding third harmonic third harmonic component transformer connections
con Synchronization and Reactive Power Control in Power System By electrical-engineering-portal.com Published On :: Mon, 11 Nov 2024 08:22:45 +0000 In the world of power systems, synchronization and reactive power control are crucial to maintaining stability, efficiency, and reliability. Synchronizing various power sources, such as generators and grids, ensures they operate in harmony to meet the demand and support the... Read more The post Synchronization and Reactive Power Control in Power System appeared first on EEP - Electrical Engineering Portal. Full Article Power Substation Premium Content Protection Transmission and Distribution bus voltage capacitor bank frequence generator phase angle phase sequence power grid protection schemes reactive power reactive power control reactive power flow synch check scheme synchro check relay synchronization synchroscope voltage difference voltage waveform
con Film Industry Conference 2011 By www.filmeducation.org Published On :: Wed, 06 Apr 2011 16:12:36 +0000 Booking is now open for the Film Industry Conference 2011! Visit the website for further details and to book your place. Full Article