Electrode needle electrode and a trot trot a pointed, respectively, and makes it possible to know when to adjust the distance, electronegativity values of trot rising voltage the brake down that occurred, it would have measured increases in value. Which shows that the value of the voltage, braking distance, electronegativity of driven down trot. Shown at 10 from the trials to make examine the damage on the surface of a solid metal needle electrode with trot camera SEM, which has made experiments and analysis of damage on the surface of a solid needle electrode metal trot-needle. Divided into 2 cases 1 case is made to check the condition of the surface material in a solid metal needle electrode trot. That is not yet over, and that has not occurred, tried to brake down from voltage monitoring with cameras, SEM can be summarized that the surface material of the tip of the needle is not yet over and it has not tried to brake down voltage occurs when making a measurement probe diameter.The middle of a sharp needle electrode of trot, then is equal to 44.08 micrometre, which the physical characteristics of a surface electrode needle trot looks rough, not smooth surface which has no cracks or damage, only sharp conditions also have value because of the uncertainty principle, and then.Instructions, a needle electrode production trot The value of its diameter should be equal (flat), which detects what may have caused the production process that are aberration from case 2. industrial inspection, materials, metal surfaces of the solid model of the needle electrode trot. After the trial, the brake voltage occurring down the electronegativity distance of 0.50, 1.00, 1.50 term trot, 2.00, 3.00, 3.50 and 2.50 cm, respectively, from monitoring by cameras, SEM can conclude that when increasing the distance, electronegativity of trot a needle and pressure increases.Electric current brake down the electronegativity increases as the distance of the trot will affect the area in front of the diameter of the electrode needles are sharp of a trot, more value. Show that the area of the cut face of the diameter of electrode and its distance, electronegativity, driven trot trot down and braking voltage that occurs with and the physical characteristics of a surface electrode needle has a rough trot style. Not smooth There are deep holes and cracks have occurred that make the front area of the electrode and trot it is corrupt.Reference document[1] F. H. Kreuger, Partial Discharge Detection inHigh Voltage Equipment,Butterworths, London,1964.[2] W. Plueksawan, P. Apiratikul, and U. Fuangsoongnern,"Partial Discharge Analysis for Power DistributionTransformer Model," in EECON 31st ElectricalEngineering Conference, Nakhonnayok, Thailand,2008, pp. 299-302.[3] IEEE Guide for High-Voltage Testing. PowerSystem Instrumentation and Measurementscommittee, IEEE Std.4-1995.[4] International Electrotechnical Commission. High-voltage test techniques Part 1: General Definitions and Test Requirements, IEC std.60060-1, 2nd edition, 1989.[5] International Electrotechnical Commission.High-voltage test techniques Part 2: MeasuringSystem, IEC std. 60060-2, 2nd edition, 1994.[6] International Electrotechnical Commission,Voltage measurement by means of standard airgaps, IEC std. 60052, 3rd edition, 2002.[7] International Electrotechnical Commission,Insulating Liquids-Determination of the BreakdownVoltage at Power Frequency–Test Method, IEC std. 60156, 1st edition, 1995.[8] J.M. Meek and J.D. Cragg, Electrical Breakdownof Gases, London: Oxford Claredon Press, 1953.[9] H. Rather, Electron Avalanches and Breakdown in Gases, Butterworths, London, 1964.[10] K.D. Vernon, "Scanning electron microscopy: an introduction," Lii-vs Review, vol. 13, No. 4,pp. 40-44, 2000.[11] M. Vasile, G. Kammlott, "Scanning Electron Microscopy of Contact Surfaces Before and After Arcing," IEEE Trans. Parts Materials and Pack., vol. 7, No. 1, pp. 16-22, 1971.
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