A new technique for high voltage measurement using high voltage electric field motor

2002 ◽  
Author(s):  
S. Potivejkul ◽  
V. Kinnares ◽  
P. Kerdonfag
Keyword(s):  
Electric Field ◽  
High Voltage ◽  
New Technique ◽  
Voltage Measurement ◽  
A New Technique

High-Voltage Rotating Machines: A New Technique for Remote Partial Discharge Monitoring of the Stator Insulation Condition

2014 ◽  
Vol 20 (6) ◽  
pp. 79-89 ◽  
Author(s):  
Lee A. Renforth ◽  
Russell Armstrong ◽  
David Clark ◽  
Steven Goodfellow ◽  
Paul S. Hamer
Keyword(s):  
High Voltage ◽  
Partial Discharge ◽  
New Technique ◽  
Rotating Machines ◽  
Discharge Monitoring ◽  
A New Technique ◽  
Insulation Condition

New Technique for Estimation of Fatigue Cracks in Concrete by the Parameters of Electric Response to Pulse Mechanical Excitation

2015 ◽  
Vol 1085 ◽  
pp. 250-254
Author(s):  
Denis D. Dann ◽  
Anna A. Demikhova ◽  
George E. Utsyn ◽  
Tatiana V. Fursa
Keyword(s):  
Electric Field ◽  
Acoustic Waves ◽  
Dipole Moments ◽  
Fatigue Cracks ◽  
New Technique ◽  
Electric Response ◽  
Nondestructive Control ◽  
Mechanical Excitation ◽  
A New Technique ◽  
Sand And Gravel

This paper introduces a new technique to test fatigue cracks in concrete that occur during its maintenance. The principle of the technique consists of exposing the object to pulsed mechanical excitation. As a result, acoustic waves start to propagate in the sample. Under the action of acoustic waves the dipole moments of double electric layers on the boundaries of components in concrete are changed and piezoquartz which is a part of sand and gravel is polarized. The external electric field occurs and is registered by a signal receiver placed near the object under study. The possibility of using this technique for crack nondestructive control is studied in the paper. The technique capabilities are shown by comparing the parameters of electric response on pulsed mechanical excitation when testing the defectless concrete and the same sample after developing the artificial crack in the concrete.

A Dedicated Device Based on the Spatial Electric Field for Measuring Voltage of Catenary System

2015 ◽  
Vol 734 ◽  
pp. 109-112
Author(s):  
Jia Song ◽  
Xiao Dong Zhang ◽  
Yue Jia Sun
Keyword(s):  
Electric Field ◽  
Field Test ◽  
High Voltage ◽  
Test Results ◽  
Induced Voltage ◽  
Voltage Measurement ◽  
Measuring Device ◽  
Voltage Difference ◽  
The Earth ◽  
Catenary System

The traditional high-voltage electroscope is difficult to distinguish normal catenary voltage and induced voltage. In order to solve the problem, a method to measure high-voltage based on the effect of space electric field is proposed and a dedicated catenary voltage measuring device is made. The method follows divider effect of spatial capacitance and achieves quantitative voltage measurement without grounding by measuring and transforming the induced voltage difference of the capacitance which is placed between the catenary system and the earth and showing the actual catenary voltage value in LCD. The device can effectively distinguish catenary normal voltage and induced voltage, then reflects catenary real operation state. The field test results show the device meets the requirement of catenary voltage measurement.

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