Published by Electrical Installation Wiki, Chapter J. Overvoltage protection – Design of the electrical installation protection system To protect an electrical installation in a building, simple rules apply for the choice of • SPD(s);• its protection system. For a power distribution system, the main characteristics used to define the lightning protection system and select a SPDContinue reading “Design of the Electrical Installation Protection System”
Author Archives: PQBlog
The Dangers of Stray Current Damage in Electrical Systems & Arc Flash Protection
Published by Jim Galloway, International Association of Electrical Inspectors (IAEI) Magazine, Electrical Fundamentals – The Dangers of Stray Current Damage in Electrical Systems & Arc Flash Protection, July 3, 2019 The new extension to the factory is finally finished. The engineers have produced a state-of-the-art design; the qualified electricians have completed a professional installation withContinue reading “The Dangers of Stray Current Damage in Electrical Systems & Arc Flash Protection”
Current-Carrying Capacity Parallel Single-Core LV Cable
Published by Lech BOROWIK1, Artur CYWIŃSKI2Politechnika Częstochowska, Wydział Elektryczny (1), Pracownia Projektowa omega-projekt (2) Abstract. The paper presents the problems related to the selection of parallel single-core low voltage cables in terms of their current carrying capacity and accordance with PN-IEC 60364-5-523 national standard, exemplified by electric power transmission from transformer MV/LV 1600kVA, with proximityContinue reading “Current-Carrying Capacity Parallel Single-Core LV Cable”
The Measurement of Input Power of Power Supply in Network Disturbed by Low Frequency Distortions
Published by Stanisław GALLA, Arkadiusz SZEWCZYK,Gdansk University of Technology Faculty of Electronics, Telecommunications and Informatics Abstract. In the paper authors present results of observation of input power changes versus harmonics amplitude in supply voltage of low-power power supply device. In the study, the electrical measurements supported with thermal imaging were used. The input circuit elementsContinue reading “The Measurement of Input Power of Power Supply in Network Disturbed by Low Frequency Distortions”
Thermal Problems in HTS Transformer due to Inrush Current
Published by Grzegorz KOMARZYNIEC1, Tadeusz JANOWSKI2, Grzegorz WOJTASIEWICZ2, Michał MAJKA2, Politechnika Lubelska, Instytut Podstaw Elektrotechniki i Elektrotechnologii (1), Instytut Elektrotechniki w Warszawie (2) Abstract. With switching on a superconducting transformer to the energetic network, a unidirectional current of high amplitude may appear. Maximal values of the current impulses following shortly one after the other mayContinue reading “Thermal Problems in HTS Transformer due to Inrush Current”
Principle of lightning Protection
Published by Electrical Installation Wiki, Chapter J. Overvoltage protection – Principle of lightning protection General rules of lightning protection Procedure to prevent risks of lightning strike The system for protecting a building against the effects of lightning must include: • protection of structures against direct lightning strokes;• protection of electrical installations against direct and indirect lightningContinue reading “Principle of lightning Protection”
How to Select the Right Current Transformer for Your Application
Published by Accuenergy, November 4, 2021. Help me choose the Right CT If you have a power measurement project coming up, chances are you have narrowed down your search for a power meter to a few choices. Whether it’s a multi-circuit application or a high-precision metering in an industrial setting, the next step in project preparationContinue reading “How to Select the Right Current Transformer for Your Application”
Electrical Shock and its Effects
Published by Alex Roderick, EE Power – Technical Articles: Electrical Shock and its Effects, August 17, 2021. Anyone working on electrical equipment should have respect for all voltages, have knowledge of the principles of electricity, and follow safe work procedures. An electrical shock occurs when a body becomes a part of an electrical circuit. The effectsContinue reading “Electrical Shock and its Effects”
Method of Selecting the Most Important Power Lines in a Transmission and Distribution Network
Published by Dalibor VALEK, Radomir SCUREK, Technical University of Ostrava, Faculty of Safety Engineering Abstract: This article describes the method used to graph theory in security analysis. For the pursposes of this study, an environment is referred to here as a network of power lines and devices and a power grid is considered as aContinue reading “Method of Selecting the Most Important Power Lines in a Transmission and Distribution Network”
Overvoltage of Atmospheric Origin
Published by Electrical Installation Wiki, Chapter J. Overvoltage protection – Overvoltage of atmospheric origin Overvoltage definitions Overvoltage (in a system) any voltage between one phase conductor and earth or between phase conductors having a peak value exceeding the corresponding peak of the highest voltage for equipment. Definition from the International Electrotechnical Vocabulary (IEV 604-03-09); available on [1] VariousContinue reading “Overvoltage of Atmospheric Origin”
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