During crane operation 1.3-4
1.3-4 Keep distance from power lines
Keep the required minimum distances away from power lines. If this is not possible because of the
particular work being carried out the lines must be disconnected (switched off).
Neither the appearance nor the height of electric power lines indicates their voltage.
In case of lines where the voltage is not known a distance of at least 5 metres between the crane and
the line must be maintained. This also applies to all load lifting gear and ancillary equipment attached
to the crane.
In addition, always observe national standards because they may differ from those given in this
operating manual.
Take into account that in wind weather a power line can sway out or the load arm of the crane can be
caused to swing by sudden movements (also upwards). Even unintentional approaching can lead to
flashover.
Flashover can occur even by just approaching a power line. This
entails the risk of fatal injury for the crane operator and auxiliary
personnel.
For overhead power lines and contact lines of electric railways the following minimum
distances apply:
A
up to à 1500V….1,0 m
over à1500V…. 1,5 m
up to à1000V….1,0 m
over à1000V.... 1,5m
B
up to..............................à
1000V .............................1,0m
1000V-10000V ...............3,0m
110000V-220000V .........4,0m
220000V-380000V .........5,0m
unknown tension ............5,0m
The crane operator is obliged to observe any additional national standards, yet country-
specific minimum distances to circuit lines may differ from those given here.
A B
=
DC
~
AC
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