Power Substation
A quick reminder to substation transformer basics and safety precautions, dos and don’ts
Let us remind ourselves of the basics of substation transformer parts, their operation principles, and do’s and don’ts for safety measures and precautions. For novice substation engineers it’s important to recognize every single detail of a transformer and later to… Read more
Aug 16, 2021 | By Edvard Csanyi
Power Substation
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Eleven deadliest mistakes made by young and unmindful substation engineers
Substation operation and maintenance is one meticulous and critical job that requires a great deal of expertise and familiarization. The complexity and scrutiny increase exponentially as the focus shifts to a higher voltage level, as the margin for error tends…...
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Aug 09, 2021 | By Bishal Lamichhane
Energy and Power
Isolation power solutions for ultimate power availability, efficiency and safety in hospitals
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
Aug 04, 2021 | By Edvard Csanyi
Medium Voltage
Special measures needed for switching MV capacitor banks and filter circuits
Switching of medium voltage capacitor banks and filter circuits poses special demands on the circuit-breaker. Potentially critical impacts are the inrush current and the stress of the recovery voltage. This technical article deals with the requirements of capacitor banks without… Read more
Aug 02, 2021 | By Edvard Csanyi
High Voltage
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MV/HV switchgear (circuit breaker) switching capability and suitability for specific applications
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…...
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Jul 26, 2021 | By Salem Alshahrani
Energy and Power
The magic that isolation transformer uses to suppress transients and noise
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
Jul 21, 2021 | By Edvard Csanyi
Electric Motor
Six methods to control the flow of harmonic currents and decrease harmonic distortion limits
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
Jul 19, 2021 | By Edvard Csanyi
Power Substation
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Load flow and short circuit analysis of a MV substation (case study 33/11 kV substation in ETAP)
Designing and operating a substation is a tiresome and challenging task, which requires hefty capital, a well-trained workforce, and lots of time. With the ever-expanding nature of electricity distribution, the MV/LV power distribution substations are mushrooming everywhere. Sometimes, they are…...
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Jul 12, 2021 | By Bishal Lamichhane
Maintenance
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Uprating and expanding existing power substations (good practice and recommendations)
All actions involving substation construction require heavy planning. This is especially true of a program of substation uprating or expansion. The trend is toward the assessment of existing substations and individual equipment to develop a predictive maintenance and substation life…...
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Jul 05, 2021 | By Edvard Csanyi
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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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
