Furukawa Unic URW376C4U -T Series, Руководство по эксплуатации и техническому обслуживанию

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3-1
3. SAFETY PRECAUTIONS ON CRANE OPERATION
Before operation
Pedal
Interlock for crane-crwal
operation
Crawling lever
Crane
★
When the crane is to be operated close to
the power transmission or distribution line,
contact in advance with a local power com-
pany to make arrangements concerning 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
Make sure crawling levers are locked.
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 opera-
tion by keeping a close watch around the
working area.