Remote LIBS of insulators located at TALOS High Voltage Test Station of Hellenic Electricity Distribution Network Operator (HEDNO) in Heraklion, Crete. 

 

On June 29, 2015 in the framework of the POLYDIAGNO project researchers from IESL-FORTH performed remote LIBS (Laser Induced Breakdown Spectroscopy) measurements on outdoors HV insulators (both stock and field ones) at the HEDNO (Hellenic Electricity Distribution Network Operator) workstation in Linoperamata, Heraklion, Crete, in collaborations with HEDNO engineers. Measurements were performed at a distance (laser-to-target) of approximately 7 m. 

 

 

IESL-FORTH equipment being transferred to the HEDNO workstation at Linoperamata, Heraklion, Crete.

 

Pulsed laser (Q-switched Nd:YAG, λ = 1064 nm, τ = 10 ns) used for the remote LIBS experiments

 

Compact optical setup used to direct and focus (f = + 5 m) the laser beam (λ = 1064 nm) on the insulator surface (the laser beam is coming through the window). The dash line and the arrows represent the optical path and the direction of the laser beam, respectively.

 

 

 

The remote LIBS apparatus (telescope, optical fiber, spectrometer, computer). The inset shows a typical LIB spectrum recorded upon irradiation of the shed surface of a field insulator with a single laser pulse.

 

 

The HEDNO (Hellenic Electricity Distribution Network Operator) experimental facility at Linoperamata, Heraklion, Crete (a) The insulator was removed from the field network (almost 20 meters above the ground) and (b) was placed on a table especially designed to hold it perpendicularly to the direction of the laser beam. (c) The laser beam spot on the insulator’s shed surface.