A noise analyzer for monitoring static electrification current

Zmarzły, D.; Kȩdzia, J.

doi:10.1016/j.elstat.2005.01.001

Cited by 27 publications

(11 citation statements)

References 16 publications

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“…A high similarity was observed in the shape of the characteristics and a distinct value increase of the current measured, in particular for higher diameters. It should be noted that a linear relation between the electrification current and the rotational speed, at various geometric dimensions of the disk, is consistent with earlier research on insulation oil and pure hydrocarbons and their mixtures [7,[15][16][17]. Figure 3 illustrates the dependences of the electrification current on the percentage concentration of hexane in toluene at a rotational speed n = 400 rpm, for a disk diameter of 6 cm.…”

Section: Analysis Of the Ectsupporting

confidence: 86%

“…Research works on the electrification phenomenon are carried out with various types of measuring systems. There are large systems using power transformers [3] or overflow [4] and spinning [5][6][7][8][9][10] laboratory systems. Another group of small systems used both in laboratory and diagnostic research works, constitutes a sensor of a volume density charge constructed in MIT -the so-called ACS (Absolute Charge Sensor) [11], and a system with a double Nelson chamber [12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Composition of Dielectric Liquid Mixtures on Electrostatic Charge Tendency and Physicochemical Parameters

Zdanowski

2008

IEEE Trans. Dielect. Electr. Insul.

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The paper presents research results on ECT (Electrostatic Charge Tendency) of hexane and toluene mixtures, that is dielectric liquids of a simple chemical structure and high purity (Pro analysi). The research tests are carried out in a spinning disk system, where the factors affecting the value of the electrification current registered are a varying composition of the mixture, rotational speed and a disk diameter. In the next stage physicochemical parameters are measured in order to determine the relationship between the properties of the mixtures under study and the electrification current generated. The research results show that the ECT of the mixture depends, to a large extent, on the proper selection of particular components.

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Section: Analysis Of the Ectsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Influence of Composition of Dielectric Liquid Mixtures on Electrostatic Charge Tendency and Physicochemical Parameters

Zdanowski

2008

IEEE Trans. Dielect. Electr. Insul.

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“…The 1000 MΩ feedback resistor made possible measurements as low as ±5nA. The 500 kΩ input resistor limited input current to safe levels in cases of significant electrostatic potential on the electrometer input [7]. Two different papers were used to coat the rotating disk: (i) diamond pattern paper 0.62 mm thickness, (ii) pressboard 4.26 mm thickness.…”

Section: Experimental Arrangementmentioning

confidence: 99%

Static electrification assessment of transformer oils in the spinning disc system

Bouslimi

Fofana

Hemmatjou

et al. 2010

2010 International Conference on High Voltage Engineering and Application

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The present paper is devoted to the study of the Electrostatic Charging Tendency (ECT) of fresh (unused) and aged transformer oils using a spinning disk system. A series of experiments were conducted under laboratory controlled conditions. The monitored parameters (conductivity, dissipation factor, water content, dissolved decay products, resistivity, turbidity ...) show that the electrification currents increase with temperature, fluid motion velocity, surface properties and the aging byproducts of the oil. The polarity, the amplitude and the time constant of the electrification currents are also affected. This contribution is not only intended to provide a fresh review in this domain of research, but also contains a substantial amount of new material with a view of closing some gaps in the present state of knowledge of oil streaming electrification.

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“…However some measurements show that polarity of the electrification can be different for the same oil but under different conditions. One of the explanations of polarity changes can be the charge overloading [9,10,11,12,13] in electrical double layer. The charge reversal is a temporary phenomenon and can be observed only for very low velocities.…”

Section: Introductionmentioning

confidence: 99%

Polarity reversal in streaming electrification measurements

Zmarzły

Aksamit

2009

2009 IEEE Conference on Electrical Insulation and Dielectric Phenomena

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In the paper measurements of streaming electrification current in the range of low velocities are presented. The measurements were conducted in Spinning Disk System that uses Wireless Rotating Electrometer. Using this system it is possible to measure electrification current in the range of several picoamperes. In proposed configuration the electrometer is installed in measurement object on the disk axle. The digital output is transferred using Bluetooth radio-frequency transceiver. This solution minimizes external disturbances and allows for measurement with standard uncertainty at the level of 30 fA depending on averaging time. The uncertainty slightly depends on spinning velocity.Several dependencies of averaged electrification current on rotational speed were shown. A fresh and C 60 fullerene doped transformer oil were used as an electrification source. It was observed that the electrification current can change its sign for different C 60 concentrations. Doping mineral oil leads to charge reversal in the electric double layer.The system presented in paper extends the range of possible research in the field of electrification on low velocities and can be useful in development of streaming electrification phenomena.

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A noise analyzer for monitoring static electrification current

Cited by 27 publications

References 16 publications

Influence of Composition of Dielectric Liquid Mixtures on Electrostatic Charge Tendency and Physicochemical Parameters

Influence of Composition of Dielectric Liquid Mixtures on Electrostatic Charge Tendency and Physicochemical Parameters

Static electrification assessment of transformer oils in the spinning disc system

Polarity reversal in streaming electrification measurements

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