Results 21 to 30 of about 435 (264)

Investigation of different system earthing schemes for protection of low-voltage DC microgrids

The Journal of Engineering, 2019
DC microgrids are expected to play an important role in maximising the benefits of distributed energy resources in future low carbon smart power systems.
Ahmad Makkieh, Abdullah Emhemed, Dong Wang, Adria Junyent-Ferre, Graeme Burt   +4 more
doaj   +1 more source

Analisa Perbandingan Tahanan Pembumian Peralatan Elektroda Pasak pada Gedung Laboratorium Teknik Universitas Borneo Tarakan

Jurnal Nasional Teknik Elektro, 2017
Earthing systems are less well able to cause damage to electrical equipment. The risks are more current can not be optimally channeled back to earth. The smaller the resistance value, The better the earthing system. In certain soil conditions, grounding
Achmad Budiman
doaj   +1 more source

Comparative Analysis of High-Voltage Power Line Models for Determining Short-Circuit Currents in Towers Earthing Systems

Energies, 2021
The article deals with the problems of single-phase short-circuit current distribution in overhead power lines. Short-circuit disturbances cause many negative phenomena in power networks.
Rafał Tarko, Jakub Gajdzica, Wiesław Nowak, Waldemar Szpyra   +3 more
doaj   +1 more source

Modeling of German Low Voltage Cables with Ground Return Path

Energies, 2021
In this contribution, measurement data of phase, neutral, and ground currents from real low voltage (LV) feeders in Germany is presented and analyzed. The data obtained is used to review and evaluate common modeling approaches for LV systems.
Johanna Geis-Schroer, Sebastian Hubschneider, Lukas Held, Frederik Gielnik, Michael Armbruster, Michael Suriyah, Thomas Leibfried   +6 more
doaj   +1 more source

Influence of the earth connections of the PWM drive on the voltage constraints endured by the motor insulation

Open Physics, 2020
The high electrical stresses in the Electrical Insulation Systems of machines fed by pulse width modulation (PWM) inverters remain a limitation of the lifetime.
Roger Daniel, Napieralska-Juszczak Ewa, Komeza Krzysztof   +2 more
doaj   +1 more source

Earth system economics: a biophysical approach to the human component of the Earth system [PDF]

Earth System Dynamics, 2020
Abstract. The study of humans has largely been carried out in isolation from the study of the non-human Earth system. This isolation has encouraged the development of incompatible philosophical, aspirational, and methodological approaches that have proven very difficult to integrate with those used for the non-human remainder of the Earth system. Here,
E. D. Galbraith, E. D. Galbraith, E. D. Galbraith   +2 more
openaire   +5 more sources

Investigations on the Performance of a New Grounding Device with Spike Rods under High Magnitude Current Conditions

Energies, 2019
In many publications, the characteristics of practical earthing systems were investigated under conditions involving fast-impulse currents of different magnitudes by field measurements.
Abdul Wali Abdul Ali, Nurul Nadia Ahmad, Normiza Mohamad Nor, Muhd Shahirad Reffin, Syarifah Amanina Syed Abdullah   +4 more
doaj   +1 more source

The Earth System: An Introduction to Earth Systems Science [PDF]

Eos, Transactions American Geophysical Union, 1999
The atmosphere, hydrosphere, biosphere, and solid Earth are the basic components of the Earth system. These different components are not separate entities; instead they interact over a broad range of spatial and temporal scales. Determining how various internal and external influences impact each component of the Earth system individually is ...
openaire   +1 more source

Forecasting the Dialysis Burden in Japan: Validation‐Based Projections of Prevalence and Incidence Through 2050

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Japan has one of the highest dialysis prevalence rates worldwide and a shrinking, aging population. Whether dialysis burden has entered a sustained post‐peak phase or whether recent declines partly reflect pandemic‐related disruptions remains uncertain.
Hatice Şahin, Berrak Itır Aylı, Nüket Paksoy   +2 more
wiley   +1 more source

Epigenetic blind spots – the role of DNA methylation dynamics in stem cell‐based models of embryogenesis

FEBS Letters, EarlyView.
Embryo‐like structures (stembryos) are an innovative tool, but they are hindered by experimental variability and limited developmental potential. DNA methylation is crucial for mammalian development, but its status in stembryo models is poorly characterized.
Sara Canil, Anna Corrà, Annalisa Scapolatiello, Chengxiang Qiu, Gianluca Amadei   +4 more
wiley   +1 more source