Methods of test for volume resistivity and surface resistivity of solid electrical insulating materials

2015 ◽  
Keyword(s):  
Volume Resistivity ◽  
Surface Resistivity ◽  
Insulating Materials

scholarly journals Volume and Surface Resistivity Measurement of Insulating Materials Using Guard-Ring Terminal Electrodes

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2811
Author(s):  
Heon-Gyeong Lee ◽  
Jin-Gyu Kim
Keyword(s):  
Dielectric Breakdown ◽  
Breakdown Strength ◽  
Resistivity Measurement ◽  
Volume Resistivity ◽  
Surface Resistivity ◽  
International Standards ◽  
Guard Ring ◽  
International Electrotechnical Commission ◽  
Renewable Energy Resources ◽  
Insulating Materials

Recently, eco-friendly energy conversion policies have been being promoted through de-nuclearization and de-coal. For this purpose, a super grid should be built to optimize sustainable renewable energy resources such as solar and wind power. Accordingly, considering the various problems such as technology and cost, a system for efficient energy transmission is required. Hence, research is being actively conducted to apply it, owing to the development of the high voltage direct current (HVDC) system. Among HVDC systems, the cable system is extremely important, in addition to the measurement of the dielectric breakdown strength, space charge, and volume resistivity of insulating materials. The existing resistivity measurement method measures both the volume and surface resistivity using a three-terminal electrode that is used in the international standards of American Society for Testing and Materials (ASTM) D 257 and International Electrotechnical Commission (IEC) 60093. However, the circuit configuration differs depending on the measurement of the volume and surface resistivity; moreover, when a DC voltage is applied to the insulator, a charging current flows and there are multiple samples to be measured, which takes a considerable amount of time. Therefore, in this study, we proposed a new type of resistivity measurement system that is based on the existing three-terminal electrode system. Furthermore, we produced a system capable of simultaneously measuring the volume and surface resistivity. Finally, using this system, we compared and analyzed the volume and surface resistivity of five insulating materials.

Core Conductive Yarn Based Integral Knitted ESD Garments Part II. Carbon Composite Yarns Investigation

2013 ◽  
Vol 772 ◽  
pp. 474-479 ◽  
Author(s):  
Codrin Donciu
Keyword(s):  
Decay Time ◽  
Electrostatic Discharge ◽  
Volume Resistivity ◽  
Carbon Composite ◽  
Surface Resistivity ◽  
Charge Decay ◽  
Knitted Structure ◽  
Conductive Yarn ◽  
Carbon Based

A research regarding integral knitted structures for electrostatic discharge (ESD) protective garments with core conductive fibres is currently undergoing. In this paper, the second part of the research is presented, in which the integral knitted structures with carbon-based fibres were investigated. A number of 8 samples were manufactured and their ESD properties were analyzed. In this regard, the surface resistivity, volume resistivity, and charge decay time were determined, and based on the results, a bilayer knitted structure was proposed.

Resistivity and Dielectric Measurements of Pb(Mn0.5 W0.5)O3 Ceramics with Guard Ring Electrode

2012 ◽  
Vol 602-604 ◽  
pp. 495-498
Author(s):  
Maung Maung Yin ◽  
Than Win Than ◽  
Yee Thein Pwint ◽  
Kyaw Soe Ko Ko
Keyword(s):  
Volume Resistivity ◽  
Ring Electrode ◽  
Small Sample ◽  
Surface Resistivity ◽  
Guard Ring ◽  
Dielectric Measurements ◽  
Reaction Route ◽  
Insulating Material ◽  
Tan Δ ◽  
Parallel Resistance

Polycrystalline Pb(Mn0.5W0.5)O3, PMW, a ferroelectric oxide was prepared by high temperature solid state reaction route. In order to reduce the measurement error caused by edge capacitance, laboratory-made three-terminal ring electrode (including a guard terminal) was constructed. A guard ring electrode eliminated parallel resistance paths that could cause errors in materials resistance measurements. Guard ring electrodes were useful devices which enable accurate dielectric measurements to be made on small sample of insulating material. The dielectric constant (ε′) and loss tangent (tan δ) of PMW ceramics were measured as a function of frequency ( 1 kHz- 100 kHz ). The volume resistivity and surface resistivity of PMW ceramics were also investigated. The smallest value of volume and surface resistivity were found to be 1.6 × 10-4 MΩ and 0.1281 MΩ, respectively.

Nano Inorganic Particles to the Doping and Influence of Polyimide Electric Breakdown

2010 ◽  
Vol 44-47 ◽  
pp. 2637-2641 ◽  
Author(s):  
Jia Qi Lin ◽  
Jun Hui Shi ◽  
Chen Wang
Keyword(s):  
Electrical Breakdown ◽  
Chemical Properties ◽  
Volume Resistivity ◽  
Surface Resistivity ◽  
Nano Particles ◽  
Breakdown Field ◽  
Zno Films ◽  
Experimental Film ◽  
Inorganic Particles ◽  
Physical And Chemical

This page is about the preparation of inorganic nanoparticle polyimide films by in-situ. Through this kind of doping, that changed the physical and chemical properties of polyimide. Experimental film by infrared, ultraviolet, SEM, electrical breakdown experiments, the surface resistivity, volume resistivity, and electrolum- inescent. The results show that the polyimide/ZnO films preparation by this kind of doping, hybrid inorganic nano-particles can reduce polyimide electrical breakdown field, the surface resistivity, volume resistivity, electroluminescent. It testified by electroluminescent show that the electroluminescent position from 561.8nm to 609.4nm. The redshift phenomenon occurs show that the apparent on polyimide trap turn lighter.

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