Furukawa Unic URW370C4U Series, Руководство по эксплуатации и техническому обслуживанию

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3-1
3. SAFETY PRECAUTIONS ON CRANE OPERATION
Before operation
• When the crane is to be operated close
to the power transmission or distribution
line, contact in advance with a local power
company to make arrangements concern-
ing safety for starting the crane operation.
• If crane operation close to the power trans-
mission or distribution line is unavoidable,
be sure to secure safety distance from the
power lines.
List of target safety distance
Power transmission line
Voltage
Safety distance (target)
500,000 volts 36ft(11.0m) or more
275,000 volts 23ft(7.0m) or more
187,000 volts 20ft(6.0m) or more
154,000 volts 17ft(5.0m) or more
66,000 volts 14ft(4.0m) or more
22,000 volts 10ft(3.0m) or more
Power distribution line
Voltage
Safety distance (target)
6,600 volts 7ft(2.0m) or more
2
Shift the interlock for crane-crawl lever
to “Crane”.
1
Be sure to make inspection before oper-
ation and periodical inspection for sling-
ing implements.
If a defective slinging implement is used, fall
of lifted cargo may result.
3
Turn ON the overwinding alarm switch.
4
Make sure that each safety device is
always functioning properly.
Be sure to turn ON the overwinding alarm
switch before starting crane operation.
• The crane is not electrically insulated.
• When the crane is operated near the power
transmission line or the power distribution
line, there may be a risk of electric shock
due to electric discharge even if a part of
the crane such as boom will not make a
direct contact with the power lines.
5
Keep a safety distance away from the
high-voltage power line to avoid an
electric shock.
6
Do not operate the crane when wind
velocity exceeds 22mph(10m/sec). and/
or while thundering.
Crane operation while strong wind is blowing
can cause fall of a lifted cargo or overturn of
the crane as the boom and/or a lifted cargo
are hit by a gust of wind.
7
Pay attention that anyone except per-
sons concerned will not enter within a
working radius of the crane.
Take good care to carry out safety operation
by keeping a close watch around the working
area.
Pedal
Interlock for crane-crawl
operation
Crawling lever
Crane