Search results for "MV cable"

showing 3 items of 3 documents

Critical issues in the PD testing methodology for XLPE-insulated MV cables: An experimental case

2017

This paper describes some critical issues arising during the partial discharge (PD) testing of a 500m delivery length of an XLPE-insulated MV cable. At first, conventional PD measurements were performed on the whole length by using a standard acquisition system; PDs activity was detected, but the system allowed the operator to localize the PDs only on a length of 70 m. A visual inspection of this section highlighted the presence of an excoriation in the outer sheet. Aiming at a more accurate pin-pointing of the defect, more measurements were carried out in the proximity of the outer defect using a portable PD detection system. These measurements showed PDs activity, whose source was located…

010302 applied physicsOperator (computer programming)Cables Cable testing MV cables Partial Discharges Partial Discharge Measurements Partial Discharge testing PD detection Wireless PD detection XLPE-insulated cablesSection (archaeology)Computer scienceAcoustics0103 physical sciencesExcoriationPartial discharge01 natural sciences2017 IEEE Conference on Electrical Insulation and Dielectric Phenomenon (CEIDP)
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Effects of double ground faults in Wind Farms collector cables

2015

Medium Voltage collector cables of Wind Farms have metal shields connected to the grounding systems of the towers and of the connection station. Thanks to this bonding, when a ground fault occurs, the fault current splits itself among all the grounding systems of the wind farm, this causing a reduction of the ground potential rise at the fault location. Nevertheless, in presence of double ground faults, very high ground potential rises occur at the two fault locations and safety against electric shock is not always assured. In order to study this issue, the paper presents a model for simulating in a simple way the effects of double ground faults occurring in Medium Voltage collectors of ext…

Engineeringbusiness.industryElectric shockGroundwind plantElectrical engineeringShieldsEnergy Engineering and Power TechnologyHigh voltageHardware_PERFORMANCEANDRELIABILITYgrounding systemmedicine.diseaseFault (power engineering)MV cableSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiamedicineDouble ground faultElectrical and Electronic EngineeringbusinessMarine engineeringVoltage
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A Model for the Study of Sheath Currents in Medium Voltage Cables for Industrial Application

2020

In this paper, the implementation of a simulation model for studying the effect of cross-bonding of metallic sheaths and/or non-magnetic armor of single-core medium voltage cables in the same circuit is discussed. With the use of single-core cables, the resistive losses due to the induced circulating currents in cable sheaths or armors causes an increase of cable temperature that reduces its ampacity. In addition, the risk of electric shock due to induced voltages may be present if a person is exposed to the armor/sheath at the unbounded end. For this reason, special bonding techniques are used to significantly reduce these currents. The authors have implemented a model that could be used t…

sheath currentsResistive touchscreenCross-bondingMaterials scienceArmourElectric shock020209 energy020208 electrical & electronic engineeringMechanical engineering02 engineering and technologymedicine.diseaseLine (electrical engineering)MV cablesSettore ING-IND/33 - Sistemi Elettrici Per L'Energia0202 electrical engineering electronic engineering information engineeringmedicineAmpacityVoltage
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