PRY-CAM For data-driven power EN

Pressure in an electrical system is measured to check the correct level of various insulating fluid or gas materials. It is useful to verify that network components such as oil-immersed transformer terminals, gas insulated switchgear (GIS) and transition joints are filled with the correct amount of insulating material, otherwise they could trigger failures. In recent years a technology that allows to monitor even the acoustic events that can occur in the vicinity of a cable has become increasingly popular. This technology applies to high voltage underground or submarine cables equipped with optical fibre, and allows detection of different types of acoustic events, from the least worrisome (earthmoving, trains, passage of ships) to the most potentially dangerous to damage a cable, like excavators, anchors or fishing. In an electrical system, temperature is a function of the ability to dissipate the heat generated by the current flow in a cable. The maximum rating of a cable is closely linked to the cable’s ability to dissipate heat. An abnormal localised temperature increase is, therefore, a symptom that the cable, at the point where the abnormal temperature increase has been detected, is not able to carry the maximum current. The adoption of an integrated monitoring system has proven effective for the operator of a transmission system or a cable connection to identify malfunctioning conditions and prevent potential disastrous events, allowing timely interventions DTS temperature chart showing measurement taken every 10 mins over a time period of 24 hrs on a hybrid underground cable system Note: The underground cable section can be easily identified by the reduced variation in temperature vs the overhead line.