M A E D A Crawler Crane 4.3 MOMENT LIMITER (OVERLOAD PREVENTION DEVICE)
5/2020 CC1908S-1 4-23
[1] When load factor is "less than 90 %"
When the hoisted load is less than 90 % of
the rated total load, the working status lamp
illuminates in green to indicate normal usage
conditions.
[2] When load factor is "90 % to less than
100 %"
When the hoisted load is 90 % (prediction
alarm) of the rated total load, the working
status lamp changes from green to yellow,
and the alarm sounds to notify the operator
and persons in the surrounding area that the
hoisted load is approaching the rated total
load.
[3] When load factor is "100 % or more"
If the hoisted load exceeds 90 % (prediction
alarm) of the rated total load and the hoisted
load becomes 100 % or more of the rated
total load by further continuing crane
operations, the working status lamp changes
from yellow to red, the alarm sounds
continuously, and the following crane actions
stop automatically:
• Boom lowering
• Boom raising
• Boom extension
• Hook hoisting
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