Remote sensing system for faulty suspension insulator units

Magnet–Solenoid type active vibrometer for non-destructive testing of electric power transmission line insulators

“…Due to such a characteristic, the ultrasonic testing process normally includes the scanning of the entire surface of a test object [1], which requires a lot of time and is sometimes impractical especially when many objects are to be tested. A laser Doppler vibrometer [2] could be applied to such a case, because the vibrometer can detect defects in a string of insulators in a short period of time. However, it still has problems with its complicated configuration having an external vibration exciting device and the poor sensitivity of its remote sensing.…”

Identification of faulty insulators by using corona discharge analysis based on artificial neural network

“…Using these tool workers have to climb up towers for inspection, which is inefficient and dangerous. For safety and efficiency a grounding remote sensing measurement system is desirable [3]. The previous basic study in our laboratory indicated that corona discharge enhancement on a string can be caused by faulty insulators on the string [4].…”