13 very important type tests of a low voltage switchgear carried out by the manufacturer
Certification of distribution assemblies is defined by international standard IEC 61439-1. This standard provides common rules that are recognized worldwide. Compliance with the standard is certified, depending on the country… Read more
Nov 06, 2019 | Low Voltage
The essentials of an automatic changeover systems in medium voltage networks
In medium voltage distribution networks, it is important to maintain a high level of reliability. Industry relies on the continuous operation of critical plant, which requires no or little disruption… Read more
Nov 04, 2019 | Energy and Power
Lessons I learned during the start-up of an MV switchgear
In the world of electrical engineering, a term start-up assumes all works which are necessary to be done for putting in operation already tested switchgear, as close as possible installed…...
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Oct 31, 2019 | Medium Voltage ♛
Reactive power compensation in electrical plants with generators
Compensation of reactive power applied in buildings or small facilities operates in the first and second quadrants of the coordinate system. Increasingly, complex industrial plants, for example plants burning wood… Read more
Oct 30, 2019 | Energy and Power
Principles and applications of busbar protection schemes (you SHOULD know about)
In olden days, the clearance of busbar faults was done by time delayed distance relays or overcurrent relays, resulting in extension of fault for longer duration of time. In present… Read more
Oct 28, 2019 | Protection
Power supply conceptual schemes for small, medium-sized and large industrial plants
This technical article presents preferred system structures and power supply concepts for small, medium-sized and large industrial plants that meet the different requirements for power demand and supply quality. For…...
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Oct 22, 2019 | Energy and Power ♛
Standard cubicle configurations for a medium voltage metal-enclosed switchgear
This technical article will shed some light on the standard design of medium voltage metal-enclosed switchgear cubicles in terms of enclosure configurations as well as the characteristics of busbar system…. Read more
Oct 21, 2019 | Energy and Power
IED (Intelligent Electronic Device) advanced functions that make our life better
Intelligent electronic devices (IEDs) have been deployed extensively in power automation systems recently, and the shift from RTUs to IEDs is evident due to the integration and interoperability features of… Read more
Oct 16, 2019 | Power Substation
Occurrence and detection of an earth fault in MV power systems with isolated neutral
The mode of operation of an MV industrial power system that is galvanically isolated from the public power supply is determined by the method of neutral earthing on the secondary… Read more
Oct 14, 2019 | Energy and Power
Top ten software for electrical design, analysis and simulation of T&D networks
The importance of stability and maintaining the power quality of the electricity transmission and distribution (T&D) networks necessitates a thorough examination of all aspects of the design, analysis, and simulation…...
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Oct 10, 2019 | Power Substation ♛
Medium voltage switches for isolation and earthing (applications & IEC 62271 ratings)
Medium voltage switches for use on 1-52kV indoor systems are predominantly used for isolation and earthing. Although the majority of these switches are air insulated, gas insulated (SF6) combination switches… Read more
Oct 09, 2019 | Energy and Power
The art of achieving selectivity between incoming feeders connected in parallel
Calculating selectivity between incoming low voltage feeders connected in parallel is never an easy task. In parallel operation of two, three and more transformers on a common busbar, the partial… Read more
Oct 07, 2019 | Energy and Power
Automatic transfer switch between three power sources (analysis of schemes)
When a switchboard can be supplied from two or more different sources, transfer between those sources can be done manually or automatically. This kind of configuration is usually designed when…...
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Oct 03, 2019 | Low Voltage ♛
Pre-commissioning checks and tests of high voltage current transformers (CTs)
Once erection is completed, various pre-commissioning checks and tests are performed to ensure the healthiness of the switchyard equipment prior to their energization. This technical article explains various major electrical… Read more
Oct 02, 2019 | Testing and Commissioning
Good practice rules for electromagnetic compatibility (EMC) of LV conductors
The search for an overall optimization of the installation with regard to electromagnetic compatibility (EMC) and its ability to function without suffering or emitting excessive interference, comes via a set… Read more
Sep 30, 2019 | Energy and Power
