Title :
The use of portable protective air gaps in liveline maintenance
fDate :
10/1/2001 12:00:00 AM
Abstract :
Portable protective air gaps (PPAG) may be used as a liveline tool to control the maximum voltage that can electrically stress the air gap at a worksite. The worker´s minimum approach distance (MAD) may be reduced to a withstand distance coordinated with the sparkover voltage of the PPAG. PPAGs are currently limited to applications at 230 through 500 kV. The factors affecting the design and performance of PPAGs are provided. The design dimensions and sparkover characteristics of several PPAGs are discussed. Work rules for use of PPAGs, that are based on field experience, are provided
Keywords :
air gaps; flashover; maintenance engineering; power overhead lines; protection; 230 to 500 kV; air gap electrical stress; design; design dimensions; liveline maintenance; maximum voltage control; performance; portable protective air gaps; sparkover characteristics; sparkover voltage; withstand distance; worker´s minimum approach distance; Air gaps; Conductors; Dielectrics and electrical insulation; Electrodes; Flashover; Force control; Geometry; Protection; Stress control; Voltage control;
Journal_Title :
Power Delivery, IEEE Transactions on
