1. ACOUSTIC DETECTION OF WEAK POINTS IN MEEC ELECTRICAL POWER NETWORK
M. Abdel-Salam, Electrical Engineering Dept., Assiut University, Assuit, Egypt

13. CONCLUSIONS (I)
The sound emission from weak points in electric power distribution network proved to be a useful tool for early detection of these points
Whenever there is a confusion in discrimination by sound pattern, frequency analysis of sound pressure level made it possible to discriminate between the different weak points

14. CONCLUSIONS (II)
Whenever there is a confusion in discrimination by sound pattern, oscilloscopic recordig of acoustic signals received from weak points becomes another tool for discrimination between « baby arcs » on polluted insulators and loose contact arcing
Phase relationship of the pulse packets on the positive and negative half cycles makes it possible to discriminate in laboratory (indoor) and file (outdoor) testing between corona discharge at sharp points and « baby arcs » on polluted insulators