Doosan DX140LC, Operation And Maintenance Manual

Page: 38 / 297

OP000596 Safety
1-32
Avoid High Voltage Cables
Serious injury or death can result from contact or proximity to
high voltage electric lines. The bucket does not have to make
physical contact with power lines for current to be transmitted.
Use a spotter and hand signals to stay away from power lines
not clearly visible to the operator.
Use these minimum distances as a guideline only. Depending
upon the voltage in the line and atmospheric conditions, strong
current shocks can occur with the boom or bucket as far away
as 4 - 6 m (13 - 20 ft.) from the power line. Very high voltage and
rainy weather could further decrease that safety margin.
NOTE: Before starting any type of operation near power lines
(either above ground or buried cable type), you
should always contact the power utility directly and
work out a safety plan with them.
Protecting Cabin from Falling Object
(Optional)
In a work site where falling objects or flying objects are
expected, be sure to install adequate protective devices for
covering the cabin.
When using a breaker, be sure to install the front window
protection guard (Figure 25).
FG000171
Figure 24
Voltage Minimum Safe Distance
6.6 kV 3 m (9' 10")
33.0 kV 4 m (13' 1")
66.0 kV 5 m (16' 5")
154.0 kV 8 m (26' 3")
275.0 kV 10 m (32' 10")
1
FG000112
Figure 25