Search results for "earth fault"

showing 3 items of 3 documents

On the hazardous situations due to the presence of HV/MV substations in urban areas

2017

The paper focuses on the hazardous situations that can rise in urban areas in case of earth fault inside a High Voltage/Medium Voltage station. IEEE and IEC/EN Standards and technical documents are examined and discussed, in order to propose some practical guidelines for a safe integration of such installations in contexts characterized by the presence of low voltage systems and not trained persons.

EngineeringEnvironmental Engineeringbusiness.industry020209 energySubstationsElectrical engineeringEnergy Engineering and Power Technology02 engineering and technologySubstationTechnical documentationIndustrial and Manufacturing EngineeringSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaEarth fault; Global Earthing Systems; Safety; Substations; electrical safetyHazardous wasteOrder (business)Global Earthing Systems0202 electrical engineering electronic engineering information engineeringElectrical and Electronic EngineeringSafetyelectrical safetybusinessLow voltageEarth faultGlobal Earthing SystemVoltage
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A Method to Evaluate Voltages to Earth During an Earth Fault in an HV Network in a System of Interconnected Earth Electrodes of MV/LV Substations

2008

An easy and swift method to evaluate, in a system of interconnected earth electrodes, earth potentials on earthing systems of medium-voltage/low-voltage (MV/LV) substations, in an event of single-line-to-earth fault inside a high-voltage/medium- voltage (HV/MV) station, is presented. The advantage of the method is the simplicity of the mathematical model for solving complex systems of any size with a sufficient accuracy for practical purposes. This paper shows the results of simulations, performed on networks with different extensions and characteristics, organized in easy-to-read graphs and tables. A comparison of these results with the values obtained according to the procedure explained …

EngineeringGroundbusiness.industryinterconnected earthing systemElectrical engineeringGESEnergy Engineering and Power TechnologyHigh voltageEarthing systemFault (power engineering)earth faultElectronic engineeringglobal earthing systemElectrical and Electronic EngineeringEarthing global earthing systems power systems faultsbusinessPower-system protectionLow voltageElectrical impedanceVoltageIEEE Transactions on Power Delivery
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Results of the research on global earthing systems: A contribution to the problem of their identification

2013

The paper presents a study on the factors that can have influence on the rise of a Global Earthing System. The first part of the work deals with: - the definition of proximity, interconnection and quasi-equipotential; - the influence of the presence of HV/MV stations on the dangerous voltages and on the permissible voltage limits; - the dependence of the hazardous condition for persons on the different kind of fault; - the effects on safety of the coexistence of HV, MV and LV systems. In the second part, starting from the discussion on the themes above-mentioned and on the results of the studies, measurement campaigns and simulations on interconnected earthing systems done in the last fifte…

Settore ING-IND/33 - Sistemi Elettrici Per L'EnergiaGlobal Earthing Systems Earth Fault Earth Electrodes
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