Condition Monitoring of Outdoor High Voltage Insulators, Online and Offline Techniques: A review


  • Haseeb Faisal HITEC University Taxila
  • Arshad Ali University of Strathclyde UK
  • Muhammad Riaz Wah Engineering College



Condition monitoring, outdoor insulators, flashover voltage, surface leakage current, transmission


Outdoor insulator plays a vital role in high voltage transmission and distribution system. The performance and properties of the outdoor insulator may severely affect due to various types of pollutants. Insulation failure in a high voltage system results in loss of supply and a considerable loss of electrical energy to distribution utilities. In order to reduce power losses and provide a reliable power transmission, the selection and design of insulators are critical. Furthermore, to monitor the condition and performance of outdoor insulators in contaminated conditions, an appropriate diagnostic technique is required. In this paper, various online and offline techniques for conditioning monitoring of outdoor insulators are reviewed under different contaminated conditions. To maintain a healthy environment, the condition monitoring of power line insulators is a crucial requirement. Several techniques have been introduced to fulfill this requirement. Each technique used in different contaminated conditions has its pros and cons. The findings indicate that the most critical effect on the surface of the insulators is based on the contamination of the surface leakage current and the flashover voltage.  This paper will help in the selection and design of condition monitoring techniques for high voltage outdoor insulators.

Author Biographies

Haseeb Faisal, HITEC University Taxila

EED, HITEC University 


MS student

Arshad Ali, University of Strathclyde UK

Research Associate, Asst. Professor

Muhammad Riaz, Wah Engineering College

MS student, Lab Engineer


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