Order Publications

Reference: ISH2017_647

Type:
ISH Collection
Title:

Detection of poor conductive clothing by a new way of inspection

 

Abstracts

During high voltage live-line maintenance, protection of working personnel is crucial because of the possibly harmful effects of electric fields exceeding their limits. Actual exposure values are defined by the International Commission on Non-Ionizing Radiation Protection (ICNIRP). Based on these guidelines, in case of occupational cases, limit for extra-low frequency E-fields with a frequency of 50 and 60 Hz is 10 kV/m. Conductive clothing acts as a Faraday-cage: during optimal circumstances, electric field inside an enclosed conductive surface is zero. In practice, these clothing has to balance the criteria of good electric field shielding and comfort, such as visibility, ventilation and weight. So-called “Faraday-holes” may decrease the efficiency of the clothing significantly. In case of poor designs – such as large openings on the clothing or the lack of face mesh – electric field may exceed its current limit. Calculations, simulations and measurements in the High Voltage Laboratory of Budapest University of Technology and Economics and practical reports of the Hungarian live-line workers prove that high electric fields may occur inside many types of conductive clothing which have passed the related electrical tests. In this paper a new way of inspection is introduced: this makes the inspection of the clothing safer, more effective, and easier to repeat.
 

File Size: 346,2 KB

Pages NB: 6

Year: 2017

 
 
 
Download
Member
FREE free
Non member
FREE free
 

Your AccountYour Account

Password forgotten

Members

may download free of charge all publications including most recent ones


Non Members

may download free of charge publications over three years old and purchase all publications

For any questions in connection with the on-line library, contact:

 

Publications and Edition Manager

publications@cigre.org