Electric Motor
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Guidelines for selecting the proper Variable Frequency Drive (VFD) for motor applications
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…...
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Jun 28, 2021 | By Salem Alshahrani
Energy and Power
The difference in how series and shunt capacitors regulate the voltage and reactive power flows
At a casual look, a capacitor seems to be a pretty boring and unsophisticated device, that is, two metal plates separated by a dielectric insulating material. Couldn’t be simpler than that. The capacitor has no moving parts but instead functions… Read more
Jun 21, 2021 | By Edvard Csanyi
Maintenance
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Learn how to troubleshoot the operation of distribution substations (problematic breakdowns)
The distribution substation is one of the most important yet arguably the most troublesome section of the power system. Prolonged operation and frequent switching make distribution substations more prone to breakdowns and failures. While the part of preventive maintenance is…...
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Jun 14, 2021 | By Bishal Lamichhane
Power Substation
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Schematics and docs needed for communication systems of substation protective relaying system
Communication systems of electric utilities have become increasingly critical to electric system protection, operation, and maintenance. For fast tripping and clearing of system faults, communication-aided relaying has become a common protection scheme, particularly in line protection. Control centers depend on…...
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This content is not available in your premium membership plan. Please upgrade your plan in order to access this content. You can choose an annually based Basic, Pro, or Enterprise membership plan. Subscribe and enjoy studying specialized technical articles, online video courses, electrical engineering guides, and papers.With EEP's premium membership, you get additional essence that enhances your knowledge and experience in low- medium- and high-voltage engineering fields.
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Jun 09, 2021 | By Edvard Csanyi
High Voltage
Parallel switching phenomenon when MV/HV circuit breakers interrupt a shared fault current
Parallel switching occurs when two or more circuit-breakers are tripped to interrupt a shared fault current. This is typically the case for such bus arrangements as a double breaker, breaker-and-a-half, breaker-and-a-third, and ring buses. Ideally, all of the circuit-breakers should… Read more
Jun 07, 2021 | By Edvard Csanyi
Low Voltage
Distribution earthing systems in LV/MV networks (design instructions and precautions)
The electrical earthing system is designed to provide safe and correct operation of the network under normal, earth fault, and transient conditions. During earth fault conditions, large fault currents may flow via the general mass of the earth en route… Read more
Jun 02, 2021 | By Edvard Csanyi
Premium Content
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Power transformers testing and commissioning at the site (instructions and precautions)
Since I started the commissioning work 30 years back, transformer commissioning consisted of more tests, but nowadays, the number of tests has been reduced due to costs and time-saving. This article will go through complete testing that needs to be…...
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May 31, 2021 | By Omar Salah
Power Substation
The essentials of overcurrent protection you are not allowed to forget (types and principles)
Relay protection is nowadays completely digitalized and very sophisticated; there is no doubt about that. But, do electrical engineers really understand what they do when setting parameters and navigate through endless menus on a relay? Most engineers do know, of… Read more
May 24, 2021 | By Edvard Csanyi
Low Voltage
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Dos and don’ts in operating LV/MV circuit breakers, relays, disconnectors and fuses
Typically, protecting an electrical system, low-voltage, medium-voltage, or high-voltage, whichever it is, does not entirely depend upon a single component. The protection system is often a coordinated combination of multiple switching and protection units working in tandem to acquire the…...
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May 17, 2021 | By Bishal Lamichhane
Power Substation
The most common failure modes of electrical equipment in distribution systems
Each piece of electrical equipment on a distribution system has a probability of failing. When first installed, a piece of equipment can fail due to poor manufacturing, damage during shipping, or improper installation. Healthy equipment can fail due to extreme… Read more
May 10, 2021 | By Edvard Csanyi
Premium Content
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My worst experience in testing and commissioning power transformers
This technical article discusses a comprehensive approach to conduct transformer commissioning successfully. The set of standards employed, test classes, and test sequence shall be identified beforehand. The pre-commissioning phase is vital in finding any issues prior to engaging in the…...
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This content is not available in your premium membership plan. Please upgrade your plan in order to access this content. You can choose an annually based Basic, Pro, or Enterprise membership plan. Subscribe and enjoy studying specialized technical articles, online video courses, electrical engineering guides, and papers.With EEP's premium membership, you get additional essence that enhances your knowledge and experience in low- medium- and high-voltage engineering fields.
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Apr 29, 2021 | By Salem Alshahrani
Cables
Dos, don’ts and precautions in wiring cables and conductors inside low-voltage switchboard
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
Apr 26, 2021 | By Edvard Csanyi
Low Voltage
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Learn how to operate an unknown energized low voltage switchgear (practical experience)
Switchgear is an integral part of the electrical protection system, which is used for isolating the faulty parts as well as de-energizing the downstream equipment during maintenance or any other usages. “Energized” is the term that signifies that the component…...
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This content is not available in your premium membership plan. Please upgrade your plan in order to access this content. You can choose an annually based Basic, Pro, or Enterprise membership plan. Subscribe and enjoy studying specialized technical articles, online video courses, electrical engineering guides, and papers.With EEP's premium membership, you get additional essence that enhances your knowledge and experience in low- medium- and high-voltage engineering fields.
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Apr 19, 2021 | By Bishal Lamichhane
Power Substation
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Learn to successfully analyze single-line, schematic, P&ID, logic, and wiring diagrams
Engineering tasks require a good skill in reading and interpreting information on drawings. Engineering drawings are the industry cornerstone of conveying detailed and precise information on how to construct, troubleshoot, maintain, and operate a system. Basic requirements are needed to…...
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This content is not available in your premium membership plan. Please upgrade your plan in order to access this content. You can choose an annually based Basic, Pro, or Enterprise membership plan. Subscribe and enjoy studying specialized technical articles, online video courses, electrical engineering guides, and papers.With EEP's premium membership, you get additional essence that enhances your knowledge and experience in low- medium- and high-voltage engineering fields.
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Apr 05, 2021 | By Salem Alshahrani
Electrical Lectures
Top ten courses on EEP Academy for electrical engineers, technicians and students
Learning and studying have never been easier than nowadays. Since we started the EEP Academy, there are thousands of electrical engineers, students, technicians, and many others who are literally hungry for knowledge and experience. This is where EEP’s contribution comes… Read more
Mar 31, 2021 | By Edvard Csanyi
