5
(3) Noise levels are measured at a distance of 1m horizontally from the hoists during
normal operation.
2.2
Mechanical Classification (Grade) and Life
Safety and life of electric chain hoists are guaranteed only when the equipment is operated
in accordance with the prescribed grade.
Pacific electric chain hoists have been designed for grade 2m in the FEM Regulations
(FEM 9.5.11). Details are provided in Table 2-2. Average daily operating time and total
operating time are determined by load distribution.
Table 2-2 Mechanical classification
Load Spectrum
(Load distribution)
Definitions
Cubic
mean
value
Average daily
Operation time
(h)
Total operating
time
(h)
1
(light)
Mechanisms or parts
thereof, usually subject to
very small loads and in
exceptional cases only to
maximum loads.
k≦ 0.50
4 - 8
12500
2
(medium)
Mechanisms or parts
thereof, usually subject to
small loads but rather
often to maximum loads.
0.50<k
≦ 0.63
2 - 4
6300
3
(heavy)
Mechanisms or parts
thereof, usually subject to
medium loads but
frequently to maximum
loads.
0.63<k
≦ 0.80
1 - 2
3200
4
(very heavy)
Mechanisms or parts
thereof, usually subject to
maximum or almost
maximum loads.
0.80<k
≦ 1.00
0.5 - 1
1600
Содержание U-MEGA PEH050
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