High Voltage Experiments

2020

Electrical energy affect to economic, electrical energy consumption will increase and decrease likely economics. In this globalization era, electricity consumption was increased trend yearly since industrialization era. The reliability Electrical energy is very important for economic growth. The lower SAIDI and SAIFI is the bench mark for reliability of electrical energy supply. The reliable of insulator cover type: YSL-70-AP affect to the reliability electrical distribution energy on over head distribution circuit. Insulator cover protected to over head distribution circuit againt animal, bird, tree ang other temporary disturbance. Insulator cover also to protect half insulated medium voltage cable againt partial discharge and flashover. Over voltage stress more often during operation, to impact to the material insulation performance. This quantitative research founding: insulator cover type: YSL-70-AP still feasible to use after voltage breakdown stress. The fault current is still...

Machines

During the operation process of high-voltage insulators, the characteristics of assessing their technical state are evaluated by using remote contactless monitoring and by subsequent forecasting of their residual life based on the developed set of diagnostic parameters of critical defects. Special attention is paid to the challenges of the practical application for remote contactless monitoring of high-voltage insulators’ current operating state. Measurements of characteristics for partial discharges on high-voltage insulators with various types of critical defects taken by electromagnetic and acoustic sensors are described. Based on the measurements, it was found that the unusual properties of the PD begin to manifest themselves starting from the intensities q ≥ 1.5–2 nC, and their maximum intensity can reach 5–7 nC. Up to PD intensities q ≤ 3 nC, most parameters of PD characteristics measured by electromagnetic and acoustic sensors correspond with an accuracy of 70–90%. It was fou...

Conference Record of the 2008 IEEE International Symposium on Electrical Insulation, 2008

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation, 2004

In this paper several important test methods for At the same time, there is no universally accepted standard artificially polluted ceramic and nouseramic insulators have APT pollution test) method for composite been reviewed. There is no standard test for noo-ceramic insulators, niS may be due to the fact that several factors insulators. The research has shown that it is necessary to in to play assessing the long performance modify the standard 5000h salt fog test to evaluate the of composite insulators. Current questions are:r when a long-term performance of non-ceramic insulators. composite insulator ages in a polluted environment do its Although the main parameter for Selection of Proper properties change from those which characterized the units ceramic and glass insulators is the amount of pollution, it perfomance , , , , der contaminated conditions when it was Seems to be n-sa=Y to Consider other envh~nmental new, how do changes in hydrophobicity affect the relation factors for selection of composite insulators. These are between results on new insulators and field average humidity, W radiation level, wind velocity, rain of aged fall. and dominant Woe of wetting. This is necessaw ..-CERAMIC 8 GLASS INSULATORS because research has shown that they directly effect the performance.nf nonseramic insulators. For the frst step, Table 2 shows the main standard tests of ceramic and glass contaminated insulators. Because of time over which ceramic insulators have been in use, the APT introduced by IEC (based on much research and field

High Voltage and Electrical Insulation Engineering, 2011

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IET Conference Publications, 2009

This paper presents the results of a four-year field research study involving the inspection of porcelain pin insulators in medium voltage networks aiming at defining their operational condition when installed in medium voltage distribution lines. The initial part of this research [1], performed during the first two years, considered a preliminary rough inspection using electromagnetic noise detectors and detailed final inspection using ultrasonic noises detectors. During the discussion of the research results, the need for clarifying the influence of the weather conditions on the effectiveness of the applied set of techniques was clearly detected. Therefore, the temperature, the wind speed and the relative humidity of the air were also recorded during the last part of the present research and included in a data base together with the main insulator data. Throughout these 4 years, once a single noise-emitting insulator was detected, all insulators installed in the inspected pole were removed and substituted by equivalent post insulators. These insulators were further classified, tested and a comparison of field and laboratory results was carried out to check the influence of the weather conditions on the noise level, defined by the detectors, which determines the boundary limit between damaged & undamaged insulators. The laboratory tests were carried out at the High

International Journal of Engineering, 2018

Different equipment’s are used to test the insulation of electrical machines and measure the break down voltages of different materials, e.g. Rogowski Profile, Borda Profile and fluke insulation tester. These testing techniques works on a common principle of applying a very high voltage across the insulating material and keep increasing the voltage which increases the electric field until the breakdown voltage is reached where the insulation breaks down. Different materials are tested via insulation testers to determine their breakdown voltages so that the corresponding correct materials are used accordingly in different situations. Devices with higher impurities causes sparks and arcing, so dielectrics having higher breakdowns should be used as their insulation, otherwise, a suitable dielectric should be used. This paper offers a novel method to overcome the above-mentioned problems using an insulation testing device that should be automated, less bulky, less expensive, portable an...

IEEE Transactions on Power Delivery, 1993

With regard to the functionality of the CPC 100 software, the CPC Explorer and the CPC Editor, this manual refers to the version V 1.4.