Results 261 to 270 of about 7,207,987 (296)

Harmonic-current-restrained relays for differential protection

Electrical Engineering, 1938
DIFFERENTIAL relaying is the commonly accepted means of protecting large power transformers, a-c generators, and station bus systems against internal faults.1 The methods and circuits employed in various instances, while differing in detail, are all fundamentally the same in basic principle.
L. F. Kennedy, C. D. Hayward
openaire   +1 more source

Effect of Harmonics Current on the Performance of Current Transformers

2022
Muhammad Syarifuddin Bin Sha'ari, Noramalina Abdullah   +1 more
openaire   +1 more source

The Effects of dc Current Polarization on Cochlear Harmonics

The Journal of the Acoustical Society of America, 1972
The effects of dc polarization of the cochlear partition were observed on harmonic distortion components in microphonics. The qualitative effects of negative polarization (scala vestibuli negative) were quite consistent and similar to those observed in the polarization of intermodulation distortion components.
J D, Durrant, P, Dallos
openaire   +2 more sources

Alternating current sensor with second-harmonic detection

Applied Optics, 2000
We describe a novel optical sensor based on the Faraday effect for measuring ac. The sensing element is a piece of material of high Verdet constant placed between polarizers. When the angle between the polarizers differs by 45 degrees, a signal of twice the frequency of the ac is generated--in addition to the usual signal with the same frequency as the
J A, Ferrari, C D, Perciante, A, Dubra, A, Arnaud, E M, Frins   +4 more
openaire   +2 more sources

The calculation of harmonics in rectified currents

Journal of the Institution of Electrical Engineers, 1930
The classical mathematical method of calculating the wave-form of rectified currents is applicable to rectifiers whose volt-ampere characteristic consists of two interesting straight lines. It is based on the observed fact that there is for each rectifier a conducting phase and an insulating phase.
openaire   +1 more source

Current International Harmonization Efforts

2009
Efforts towards international cooperation or harmonization can occur at varying levels – at the level of technical and scientific requirements, of dossier format and content, or of assessment and review practices. Three contrasting models for regional cooperation in drug regulation harmonization, the corporate, populist, and cooperative, are described ...
openaire   +1 more source

Valuation of harmonic current injections

2002
The number of power electronic and distorting loads, continue to grow at a rapid pace. Accompanying this growth in distortion sources is an increased sensitivity of certain types of loads to harmonic distortion, and poor power quality in general. The result is greater variance in the value loads place on a harmonic free supply, and therefore what they ...
openaire   +2 more sources

Harmonic Currents and Canonical Complexes

2001
In the present chapter we establish a Hodge theory for the complexes In particular, we prove a decomposition of the spaces which resembles the Hodge decomposition on compact Riemannian manifolds. The method can be explained easily in the classical framework. Let (M,g) be a compact Riemannian manifold with Hodge-Laplacian on p-forms.
openaire   +1 more source

ESPRIT associated with filter bank for power-line harmonics, sub-harmonics and inter-harmonics parameters estimation

International Journal of Electrical Power and Energy Systems, 2020
Augusto Cerqueira, Carlos Augusto Duque
exaly  

Alternating current polarography in the harmonic multiplex mode. Simultaneous acquisition of direct current, fundamental harmonic alternating current, and second harmonic alternating current polarographic responses

Analytical Chemistry, 1972
Donald E. Glover, Donald E. Smith
openaire   +1 more source