Oluschinski: Created page with "{{Language_sel|LANG=ger|ARTIKEL=Durchgangswiderstand}} {{PSM_Infobox}} Volume resistance FORCETOC ==Definition of the volume resistance== The volume resistance is defined as the quotient of an electrical voltage applied between two electrodes and the current intensity measured between these electrodes. Two ring-shaped plate electrodes are applied to the test specimen, which consists of a plastic..."

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Created page with "{{Language_sel|LANG=ger|ARTIKEL=Durchgangswiderstand}} {{PSM_Infobox}} Volume resistance __FORCETOC__ ==Definition of the volume resistance== The volume resistance is defined as the quotient of an electrical voltage applied between two electrodes and the current intensity measured between these electrodes. Two ring-shaped plate electrodes are applied to the test specimen, which consists of a plastic..."

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{{Language_sel|LANG=ger|ARTIKEL=Durchgangswiderstand}}
{{PSM_Infobox}}
Volume resistance
__FORCETOC__

==Definition of the volume resistance==

The volume resistance is defined as the quotient of an electrical voltage applied between two electrodes and the current intensity measured between these electrodes.

Two ring-shaped plate electrodes are applied to the test specimen, which consists of a [[Plastics | plastic]] or [[Elastomers|elastomer]] and whose contact surfaces must be flat and plane-parallel. However, other geometries are also possible (e.g. cylindrical electrodes). At a given voltage ''U'', the value of which must be below the [[Electrical Strength | electrical strength]] in relation to the distance between the electrodes, and a constant current ''I'', the resistance value is determined. The current along the [[Surface|surface]] is not taken into account, and possible polarisation phenomena at the electrodes are neglected.

==Measurement setup for determining the volume resistance==

The volume resistance is determined according to the measuring set-up in '''Fig. 1'''. Here, ''U'' is the operating voltage and ''R''V is a variable resistor with which the measuring voltage ''U''V at the two electrodes of the measuring capacitor, in which the dielectric to be tested is located, can be set.

[[file:Volume Resistance 1.jpg|500px]]
{|
|- valign="top"
|width="50px"|'''Fig. 1''':
|width="600px" |Principle circuit diagram for measuring the volume resistance
|}

To prevent deformation of the electric field between the electrodes and to avoid the measurement errors caused by this, the anode (lower electrode in Fig. 1) is divided into a ring electrode, which is placed on the potential of the cathode, and a measuring electrode, with a gap of 5 mm between these two electrodes to prevent voltage flashovers according to DIN IEC 60093.

Typical [[Plastics | plastics]] for testing the volume resistance are insulating materials such as polyethylene ([[Plastics – Symbols and Abbreviated Terms | abbreviation]]: PE), polyvinyl chloride ([[Plastics – Symbols and Abbreviated Terms | abbreviation]]: PVC), polyester ([[Plastics – Symbols and Abbreviated Terms | abbreviation]]: PES), polytetraflourethylene ([[Plastics – Symbols and Abbreviated Terms | abbreviation]]: PTFE or Teflon) and elastomers.

The electrical [[Material Value|values]] of volume resistance and [[Electrical Strength | electrical strength]] are determined with a high-impedance resistance measuring device with connected measuring capacitor or with a electric strength tester.

==See also==

* [[Electrical Strength|Electrical strength]]
* [[Dielectric Properties|Dielectric properties]]
* [[Dielectric Loss Factor|Dielectric loss factor]]

'''References'''

* Hellerich, W., Harsch, G., Haenle, S.: Werkstoffführer Kunststoffe: Eigenschaften, Prüfungen, Kennwerte. Carl Hanser Munich Vienna (2004) (ISBN 978-3-446-22559-6)
* DIN IEC 60093 (1993-12): Methods of Test for Insulating Materials for Electrical Purposes; Volume Resitivity and Surface Resistivity of Solid Electrical Insulating Materials (IEC 60093:1980), German Version HD 429 S1:1983 (withdrawn; replaced by DIN EN IEC 62631-3-1 (2023-10))
* DIN EN IEC 62631-3-1 (2023-10): Dielectric and Resistive Properties of Solid Insulating Matrials – Part 3-1: Determination of Resistive Properties (DC methods) – Volume Resistance and Volume Resistivity – General Method (identical with VDE 0307-3-1:2023-10)
* Schönhals, A.: Electrical and Dielectrical Properties. In: [[Grellmann, Wolfgang|Grellmann, W.]], [[Seidler, Sabine|Seidler, S.]] (Eds.): Polymer Testing. Carl Hanser, Munich (2022) 3rd Edition, pp. 330–368 (ISBN 978-1-56990-806-8; see [[AMK-Büchersammlung|AMK-Library]] under A 22)

'''Additional References'''

* Dhakal, K. N., [https://researchgate.net/profile/Ralf-Lach Lach, R.], [https://www.researchgate.net/profile/Wolfgang-Grellmann Grellmann, W.], Krause, B., Piontek, J., Adhikari, R.: Piezoresitivity and strain-sensing behavior of poly (butylene adipate-co-terephthalate)/multiwalled carbon nanotube nanocomposites. Royal Society of Chemistry. RSC Advances (RSC Adv.) 14 (2024) 35715–35726 DOI: [https://doi.org/10.1039/D4RA04826A https://doi.org/10.1039/D4RA04826A]

[[category:Electrical and Dielectrical Testing]]

Volume Resistance - Revision history