Results 221 to 230 of about 21,965 (267)
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Evaluation of mesh and touch voltage at substations
IEE Proceedings - Generation, Transmission and Distribution, 2002Site tests, to measure the voltages on the surface of the ground above a grid for comparison with calculated values, are only of general interest if the ground has uniform resistivity at and below the grid. However, such conditions rarely if ever exist so the only practical alternative way of obtaining general data is to make tests on model grids in a ...
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Step and touch voltage – an update for 2004
Australian Journal of Electrical and Electronics Engineering, 2005Hazardous step and touch voltages arise in a variety of high voltage electrical installations, and there are a number of different industry publications which publish acceptable step and touch voltage limits. This paper sets out the derivation of step and touch voltage limits based on the work of Dalziel and Biegelmeier and Lee, and AS/NZS 60479.1 ...
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Optimal Design in Distribution Substation’s Grounding System for Decreasing Touch Voltage
2020 17th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), 2020This paper presents a technique for grounding system design in a small area distribution substation. Compression ratio adjustment in order to decrease touch voltage is hard to design with this situation due to the limitation of area. Furthermore, this condition can’t use the ground rod length increasing method since the length doesn’t reach bottom ...
Arwut Puttarach +5 more
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Measurement of touch voltage in electrical installations, in TN system, in low voltage earth fault
Proceedings of 8th Mediterranean Electrotechnical Conference on Industrial Applications in Power Systems, Computer Science and Telecommunications (MELECON 96), 2002This paper explains two new methods for the measurement of touch voltage, in TN power systems, under low voltage earth faults. After some general considerations of standard measurements, as a consequence of direct experiences and tests, two new methods (voltage drop and volt-amperometric) have been studied as an alternative to the method which foresees
A. Corvino, A. Maurella
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Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, 2012
This paper describes the analysis technique of risk voltage around grounding electrode by new touch and step voltage measurement methods. We have analyzed three techniques for risk voltage measurement, such as footprint-electrode method, test-probe method, and simulated-personnel method.
Hyoung-Jun Gil, Hyang-Kon Kim
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This paper describes the analysis technique of risk voltage around grounding electrode by new touch and step voltage measurement methods. We have analyzed three techniques for risk voltage measurement, such as footprint-electrode method, test-probe method, and simulated-personnel method.
Hyoung-Jun Gil, Hyang-Kon Kim
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A new method and instrument for touch and step voltage measurements
IEEE Transactions on Power Delivery, 1994This paper describes a new method and instrument for measuring touch and step voltages near a grounding system, for example in and around a substation. The hardware, software, and testing procedures are an extension of the smart ground multimeter, developed under EPRI sponsorship.
A.P.S. Meliopoulos +2 more
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A Thevenin equivalent approach for touch voltage and step voltage
2000This paper describes numerical algorithm for accurate computing of the touch voltage and step voltage. The algorithm is based on the Thevenin equivalent and grid model of the human's feet.It is practically to use this accurate approach only for some very important points on the earth surface because Thevenin equivalent circuit is valid only for a given
Sarajčev, Ivan +2 more
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New concept for the protection against lightning overvoltages and touch voltages
18th International Conference and Exhibition on Electricity Distribution (CIRED 2005), 2005Overvoltages in electrical supply networks of AC and DC railway networks result from the effects of lightning strokes and switching actions and cannot be avoided. Furthermore, the power supply of electrical railways is endangered by direct or nearby lightning. Considering additional the safety aspects for people (touch voltages) in railway systems, one
M. Brizzi, B. Richter
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A simulation model to estimate touch voltage in DC railway systems
2016 AEIT International Annual Conference (AEIT), 2016The study presents a railway system simulation model aimed to evaluate the safety requirements about touch voltage in the railway lines fed by 3 kV DC. In particular, the model analyses the transient period during a fault and the dynamic behavior of the DC circuit breaker.
Spalvieri, C. +4 more
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Touch voltage is not enough - meeting our duty of care
2016 Down to Earth Conference (DTEC), 2016The vast majority of engineering design decisions are multivariate, and earthing system design is no exception to the rule. Safety targets are but one dimension, supported beneath by layers of decisions. Additionally many other critical decisions are to be made before an installation may be signed off as being ‘fit for purpose’. Designers, constructors
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