Apparatus for checking the contamination condition of electric insulators
AssigneeENEL-Ente Nationale per l'Energia Elettrica
InventorGiovanni Marrone
Life of this patent
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Abstract
The apparatus comprises a probe-insulator (3) with an internal cavity, a first system (8/1) that circulates a cold fluid within the cavity (4) of the probe-insulator in order to cool the latter to such a temperature that the external humidity condenses on the external surface, a second system (8/2) for measuring the surface conductivity on the probe-insulator, a third system for activating a washing plant of all insulators installed in the same area when the measured value of said surface conductivity reaches a pre-set critical value; the refrigerating device that produces said cold fluid preferably includes a group of Peltier modules.
Claims4
An apparatus for checking the contamination conditions of electric insulators by measuring the quantity of contaminator material deposited on the external surface of a probe-insulator (3), which apparatus comprises:
- a probe-insulator (3) in a fixed position featuring an internal cavity (4);
- a first system (8/1) that circulates within the cavity (4) a cold fluid for cooling the probe-insulator (3) to a temperature such that the outside humidity condenses on the external surface of the probe-insulator;
- a second system (8/2) to measure the surface conductivity of the probe-insulator cooled by said first system (8/1);
- a third system that generates an alarm signal at the moment in which the surface conductivity measured on said cooled probe-insulator (3) reaches a pre-set critical conductivity value and hence activates an automatic washing plant for the insulators installed in that same area or commands a cleaning operation with insulators disconnected.
Dependencies are inferred from the claim text.