The Contact Acoustic Sensor is mainly used for oil filled transformers, circuit breakers and other plant. Its main function is to detect Partial Discharge through contact with these assets. The contact sensor uses capacitive coupling technology and is used oil filled cabinets. When installed the sensor detects high frequency signals caused by partial discharge inside the switchgear. It can also be used as an accessory with IPEC PD Spot Testers.
Discharge in oil
Discharge activity in oil filled equipment can lead to insulation breakdown and equipment failure. Discharge levels vary and often build up over time so their detection can be used and an indication of pending failure.
The discharge activity creates acoustic emission that can be detected using a high frequency sensor. Oil and the outer metal cladding of the equipment are good acoustic conductors so this activity can vary often be detected acoustically.