Results 11 to 20 of about 749,140 (312)
On the Characterisations of the Impulse Breakdown in High Resistivity Soils by Field Testing
Energies, 2021 This paper presents experimental results of high-current impulse tests on six ground electrode configurations. A high impulse current generator is employed to inject different magnitudes of current into these rod electrodes, under both positive and ...
Abdul Wali Abdul Ali +1 more
doaj +1 more source
Review: Factors Affecting the Performance of Ground Electrodes under High Impulse Currents
Energies, 2023 Most studies have observed that the impedance values of ground electrodes under high impulse conditions (Zimp) are lower than the resistance values under steady-state conditions (RDC).
Normiza Mohamad Nor
doaj +1 more source
IET Generation, Transmission & Distribution, 2023 The impulse grounding impedance of tower grounding device is one of the important factors in the lightning protection evaluation of transmission line. The impulse characteristic test of the actual tower grounding device under lightning was rarely carried
Yi Zhang +7 more
doaj +1 more source
Impulse Characteristics of Highly Wetted Soils [PDF]
Journal of Electrical and Electronics Engineering, 2023 It has been well accepted that under high impulse conditions, ionisation process in soil would occur, causing the ground resistance value to fall to a lower value than that obtained at low voltage low current, RDC.
REFFIN Muhd Shahirad +4 more
doaj
Energy Reports, 2022 Large-capacity impulse test of distribution transformer requires a large amount of instantaneous energy, while the impulse mode of conventional dedicated high-voltage line and generator requires synchronous switch, adjusted impedance, generator, etc ...
Bo Niu +4 more
doaj +1 more source
Scientific Reports, 2022 Non-pharmacological treatment with high-flow nasal cannula (HFNC) may play a vital role in treatment of patients with chronic obstructive pulmonary disease (COPD).
Y. Kuo +8 more
semanticscholar +1 more source
Approximation of the acoustic radiation impedance of a cylindrical pipe [PDF]
, 2008 Useful approximation formulae for radiation impedance are given for the reflection coefficients of both infinitely flanged and unflanged rigid-walled cylindrical ducts.
A.N. Norris +14 more
core +3 more sources
Impedance and impulse response measurements using low-cost components [PDF]
The Journal of the Acoustical Society of America, 1982 A thin 27-mm-o.d. disk transducer (from Radio Shack 273-060 signaler) is RTV sealed to the end of a measurement tube whose 15 mm i.d. not only approximates the transducer disk's nodal circle but also the i.d. of a clarinet, sax, or trumpet mouthpiece. A 10-mm-o.d.
M. I. Ibisi, A. H. Benade
openaire +1 more source
Digital Impedance Emulator for Battery Measurement System Calibration
Sensors, 2021 Meaningful information on the internal state of a battery can be derived by measuring its impedance. Accordingly, battery management systems based on electrochemical impedance spectroscopy are now recognized as a feasible solutions for online battery ...
Francesco Santoni +3 more
doaj +1 more source
High current field test of impulse transient characteristics of substation grounding grid
The Journal of Engineering, 2018 It is significant to research the impulse characteristics of substation grounding grid for its optimal design and safe and stable operation. In order to obtain the impulse transient characteristics of substation grounding grid under lightning impulse ...
Xuefang Tong, Xiaohui Dong, Bo Tan
doaj +1 more source