Potential gradient measuring device based on a partial method

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Potential gradient measuring device based on a partial method

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© The Institution of Electrical Engineers
Published

This paper presents a new method for measuring the potential above the remote-earth potential gradient of electric power plants. The advantage of the method is that there is no need for a galvanic connection between the measured item and the measuring device thereby avoiding any exposure to dangerous potentials that might otherwise be transferred from the measured item during the measurement. To meet the demands of this method, measuring probes and a measuring device have been made which allow for measurement automisation.

Inspec keywords: fault location; earthing; power plants; substations; voltage measurement

Other keywords: substation earthing; remote-earth potential gradient; electric power plants

Subjects: Voltage measurement; Protection apparatus; Substations

References

    1. 1)
      • Žlahtič, F.: `Potential gradient measuring device', Patent application 2271/88, .
    2. 2)
      • `IEEE guide for measuring earth resistivity, ground impedance, and earth surface potentials of a ground system', IEEE Std 81, .
    3. 3)
      • W. Erbacher . (1955) Probleme der Erdung Höchstspannungsstationen unter besonderer Berücksichtigung der Messung, Österreichische Zeitschrift für Elektrizitätswirtschaft.
    4. 4)
      • Žlahtič, F.: `A method for the plant potential rise above remote earth — potential gradient measurement', Patent application 1372/91, .
    5. 5)
      • Žlahtič, F.: `Measuring probes which provide the information of the measurement ready status', Patent application 329/88, .
    6. 6)
      • K.H. Feist . Erdungmessungen in öffentlichen und industriellen Stromversorgungsanlagen. Siemens Zeit. , 6 , 466 - 492
    7. 7)
      • K.H. Feist . Nachprüfung der Schritt und Berührungsspannungen in Umspannwerken mit hohen Erderströmen. Elektrotech. Zeit.-B , 5 , 189 - 200
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