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Papers by Wallace L Vosloo

Research paper thumbnail of High Voltage Engineering. Practice and Theory

The authors believe that the information and guidance given in this work represent good practice ... more The authors believe that the information and guidance given in this work represent good practice in the field of high voltage engineering. However, when making use of this book all parties must rely on their own skill and judgment. The authors do not accept any liability whatsoever for any loss or damage caused by any error or omission in the work, whether such error or omission is the result of negligence or any other cause. Any and all such liability is disclaimed.

Research paper thumbnail of A study into the effect of sugar cane fires on AC corona noise : development of a laboratory simulation and measurement process

Thesis (M. Ing.) -- University of Stellenbosch, 1992.One copy microfiche.Full text to be digitise... more Thesis (M. Ing.) -- University of Stellenbosch, 1992.One copy microfiche.Full text to be digitised and attached to bibliographic record

Research paper thumbnail of A Comparison Between Measured Leakage Current and Surface Conductivity During Salt Fog

This paper deals with an Insulator Pollution Monitoring Relay (IPMR), designed to measure and mon... more This paper deals with an Insulator Pollution Monitoring Relay (IPMR), designed to measure and monitor pollution on high voltage insulators. The IPMR determines the pollution severity by measuring the surface conductivity on the test insulator. The paper reports on how the IPMR was used to measure surface conductivity on the test insulator while a salt fog test was performed on typical power line insulators. The leakage currents were measured on the test insulators and the data was captured together with the surface conductivity values. The results discuss whether the IPMR is capable of the early detection of an instantaneous pollution event. The results are also utilised to compare the relationship between measured surface conductivity and leakage current values thus predicting flashover.

Research paper thumbnail of A comparison of the performance of high-voltage insulator materials in a severely polluted coastal environment

I, the undersigned, hereby declare that the work contained in this dissertation is my own origina... more I, the undersigned, hereby declare that the work contained in this dissertation is my own original work and has not been previously, in its entirety, submitted at any university for a degree. The sources that I have used or quoted have been indicated and acknowledged by means of references.

Research paper thumbnail of A Comparison Between Measured Leakage Current And Surface Conductivity During Salt Fog Tests

This paper deals with an Insulator Pollution Monitoring Relay (IPMR), designed to measure and mon... more This paper deals with an Insulator Pollution Monitoring Relay (IPMR), designed to measure and monitor pollution on high voltage insulators. The IPMR determines the pollution severity by measuring the surface conductivity on the test insulator. The paper reports on how the IPMR was used to measure surface conductivity on the test insulator while a salt fog test was performed on typical power line insulators. The leakage currents were measured on the test insulators and the data was captured together with the surface conductivity values. The results discuss whether the IPMR is capable of the early detection of an instantaneous pollution event. The results are also utilised to compare the relationship between measured surface conductivity and leakage current values thus predicting flashover.

Research paper thumbnail of High Voltage Engineering Practice and Theory

The authors believe that the information and guidance given in this work represent good practice ... more The authors believe that the information and guidance given in this work represent good practice in the field of high voltage engineering. However, when making use of this book all parties must rely on their own skill and judgment. The authors do not accept any liability whatsoever for any loss or damage caused by any error or omission in the work, whether such error or omission is the result of negligence or any other cause. Any and all such liability is disclaimed.

Research paper thumbnail of Leakage Current on Porcelain and Silicone Insulators Under Sea or Light Industrial Pollution

Power Delivery, IEEE …, 2011

The leakage current on heavily polluted silicone rubber insulators is usually smaller than on sim... more The leakage current on heavily polluted silicone rubber insulators is usually smaller than on similarly polluted porcelain insulators. In this paper, results are presented that show that under light contamination, the currents on the two types of insulators can have similar values. Results are also presented from two different sites that show that under certain conditions the currents on silicone insulators can be higher than on porcelain. The phenomenon is explained, referring to the superior washability of the porcelain and moisture absorption of the pollution layer on the silicone rubber insulators during times of high humidity.

Research paper thumbnail of High Voltage Engineering. Practice and Theory

The authors believe that the information and guidance given in this work represent good practice ... more The authors believe that the information and guidance given in this work represent good practice in the field of high voltage engineering. However, when making use of this book all parties must rely on their own skill and judgment. The authors do not accept any liability whatsoever for any loss or damage caused by any error or omission in the work, whether such error or omission is the result of negligence or any other cause. Any and all such liability is disclaimed.

Research paper thumbnail of A study into the effect of sugar cane fires on AC corona noise : development of a laboratory simulation and measurement process

Thesis (M. Ing.) -- University of Stellenbosch, 1992.One copy microfiche.Full text to be digitise... more Thesis (M. Ing.) -- University of Stellenbosch, 1992.One copy microfiche.Full text to be digitised and attached to bibliographic record

Research paper thumbnail of A Comparison Between Measured Leakage Current and Surface Conductivity During Salt Fog

This paper deals with an Insulator Pollution Monitoring Relay (IPMR), designed to measure and mon... more This paper deals with an Insulator Pollution Monitoring Relay (IPMR), designed to measure and monitor pollution on high voltage insulators. The IPMR determines the pollution severity by measuring the surface conductivity on the test insulator. The paper reports on how the IPMR was used to measure surface conductivity on the test insulator while a salt fog test was performed on typical power line insulators. The leakage currents were measured on the test insulators and the data was captured together with the surface conductivity values. The results discuss whether the IPMR is capable of the early detection of an instantaneous pollution event. The results are also utilised to compare the relationship between measured surface conductivity and leakage current values thus predicting flashover.

Research paper thumbnail of A comparison of the performance of high-voltage insulator materials in a severely polluted coastal environment

I, the undersigned, hereby declare that the work contained in this dissertation is my own origina... more I, the undersigned, hereby declare that the work contained in this dissertation is my own original work and has not been previously, in its entirety, submitted at any university for a degree. The sources that I have used or quoted have been indicated and acknowledged by means of references.

Research paper thumbnail of A Comparison Between Measured Leakage Current And Surface Conductivity During Salt Fog Tests

This paper deals with an Insulator Pollution Monitoring Relay (IPMR), designed to measure and mon... more This paper deals with an Insulator Pollution Monitoring Relay (IPMR), designed to measure and monitor pollution on high voltage insulators. The IPMR determines the pollution severity by measuring the surface conductivity on the test insulator. The paper reports on how the IPMR was used to measure surface conductivity on the test insulator while a salt fog test was performed on typical power line insulators. The leakage currents were measured on the test insulators and the data was captured together with the surface conductivity values. The results discuss whether the IPMR is capable of the early detection of an instantaneous pollution event. The results are also utilised to compare the relationship between measured surface conductivity and leakage current values thus predicting flashover.

Research paper thumbnail of High Voltage Engineering Practice and Theory

The authors believe that the information and guidance given in this work represent good practice ... more The authors believe that the information and guidance given in this work represent good practice in the field of high voltage engineering. However, when making use of this book all parties must rely on their own skill and judgment. The authors do not accept any liability whatsoever for any loss or damage caused by any error or omission in the work, whether such error or omission is the result of negligence or any other cause. Any and all such liability is disclaimed.

Research paper thumbnail of Leakage Current on Porcelain and Silicone Insulators Under Sea or Light Industrial Pollution

Power Delivery, IEEE …, 2011

The leakage current on heavily polluted silicone rubber insulators is usually smaller than on sim... more The leakage current on heavily polluted silicone rubber insulators is usually smaller than on similarly polluted porcelain insulators. In this paper, results are presented that show that under light contamination, the currents on the two types of insulators can have similar values. Results are also presented from two different sites that show that under certain conditions the currents on silicone insulators can be higher than on porcelain. The phenomenon is explained, referring to the superior washability of the porcelain and moisture absorption of the pollution layer on the silicone rubber insulators during times of high humidity.