برخورد بيل مكانيكي با خطوط هوايي فشار قوي برق

تصوير A بوم بيل مكانيكي را نشان مي دهد كه با شبكه ولتاژ قوي برخورد نموده است

Electrical arcing occurred when a high voltage/high current cross-country power line contacted the boom of a CAT excavator. Current flowed throughout the entire excavator in passing to the ground. In fact, the current that passed through the CAT excavator "crystallized" the ground around the excavator. A view of the subject excavator at the accident scene is shown in Photograph A.
Photograph A: Cat excavator at accident scene, where a high voltage/high current power line contacted the excavator boom.

تصوير B محل برخورد با هادي برق و آسيب ناشي از قوس را نشان مي دهد

Metallurgical evaluation of various CAT excavator parts revealed that considerable arcing damage occurred at component part joints and junctions. Photograph B shows engine main bearing arcing damage.
Photograph B: Main bearing arcing damage.
Photograph C shows external electrical arcing damage to electrical conduit on the subject excavator.
Photograph C: Arcing damage on electrical conduit
After metallurgical analysis, it was concluded that replacement of individual arc damage parts would be more costly than merely replacing the entire CAT excavator.

تصوير C محل برخورد با هادي الكتريكي و آسيب ناشي از قوس الكتريكي را نشان مي دهد