The paper presents the activity in support of studies of insulators behavior in air exposed to environmental and anthropogenic contamination: the possibility of knowing and predicting the actual dielectric sealing conditions of the insulators allows an increase in network reliability in the face of these phenomena. To this end, it is necessary to monitor the condition of the installations, possibly extend the life of the components without affecting the continuity and quality of service, and implement the appropriate intervention strategies with scheduled cleaning operations.

The Report is aimed at the development of methodologies and technological solutions for the detection of the state of the insulations in the air and the improvement of their dielectric strength, in order to increase the resilience of the power grid in the presence of critical conditions of environmental contamination levels.

In this regard, the following activities were conducted:

• testing of four different types of insulators with different leakage lines (composite, plain glass hood and pin, with RTV silicone coating, complete and partial) at the LANPRIS station: analysis of the measured leakage currents, in terms time series, observing trend, seasonality, cyclicity, and autocorrelation (ACF);
• field installation in LANPRIS of the prototype MCMEL device for monitoring the environmental contamination level of isolators;
• implementation of new improvements in the IoT network interface of the MCMEL device;
• Salt spray characterization tests, in the Pollution Laboratory in RSE, of the prototype IoT-based COILCMS IoT device for monitoring the contamination level of insulators;
• field installation, in LANPRIS, of the compact prototype COILCMS IoT device.