s=selectedTextlines of field "lista" -- Trova il numero di riga
sel=textline s of text of field "lista" -- Trova il testo della riga
clear text of field definizione -- Pulisci il campo descrizione
hide picture "FSC"
conditions
when sel contains "Electrode current" -- Se scelto "Electrode…
-- Setta il testo del campo descrizione con la definizione
text of field "definizione" = "Line current that circulates inside the cooled cables, the electrode-holder arms and the electrodes"
when sel contains "Secondary current"
text of field "definizione" = "Current that circulates inside the secondary circuit before its triangle closing:"
show picture "FSC" -- Mostra la formula
when sel contains "Diameter of the electrode circle"
text of field "definizione" = "Ideal circumference where the three electrodes are placed at the same distance one from the other."
when sel contains "Individual protection meanses"
text of field "definizione" = "Means and/or devices for the operator’s protection against any danger connected to the operation that is carried out (ex. gauntlets, mask, goggles, safety hat, ...)."
when sel contains "Local control pulpit"
text of field "definizione" = "Control pulpit for the machine operations, placed near the connected machine."
when sel contains "Main control pulpit"
text of field "definizione" = "Control pulpit for the operations of the plant machines, placed inside the main control cabin."
when sel contains "Arc voltage"
text of field "definizione" = "It is measured (Volt) between the electrode tip and the scrap (or the liquid bath, according to the process phase)."
when sel contains "Current density"
text of field "definizione" = "Ratio between the current that circulates inside a conductor and the conductor metallic section."
when sel contains "Electric arc"
text of
field "definizione" = "Continuous flow of ions, which develops between
the electrode tip and the scrap (or the liquid steel) and that determines
the continuity of the furnace electric circuit."
when sel contains "Long arc"
text of field "definizione" = "Once, when the foamy slag technique was unknown, the short electric arc was used during the final phase of the melting and the whole refining phase, to limit radiation and, consequently, the wear of the shell refractory lining. "
text of field "definizione" = text of field "definizione" & CRLF & CRLF & "So, the furnace operation would take place with" & CRLF & CRLF & "* low arc VOLTAGE ( the arc voltage is proportional to its length );"& CRLF & CRLF & "* HIGH arc current ( electrode current) with consequent high wear of the electrodes." & CRLF & CRLF
text of field "definizione" = text of field "definizione" && "Today, with the the foamy slag technique, the problem of the wear of refractory lining has faded into the background (since the arc is covered with foamy slags). Therefore, the long arc can be used during the whole casting with consequent high voltage and low arc current (electrode current) with considerable reduction in the electrode wear."
end
end
close this window -- Chiude la finestra
end
to handle mouseEnter
set fillColor to 0, 90, 0 -- "illumina" il bottone
show angledLine "LE1" -– Mostra effetto 3D
show angledLine "LE2"
end
to handle mouseLeave -- All’uscita del mouse
set fillColor to 0, 75, 0 -- "spegni" il bottone
hide angledLine "LE1" -– Nascondi effetto 3D
hide angledLine "LE2"
end