The viewpoint of the catalogue

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Percentage of duty cycle and number of starts per Hr.

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  • Starting frequencies represent the number of starts during one hour at the busiest rate of operation.
  • Special designs are required for applications involving load/time rations in excess of 40% or starting number frequencies in excess of 400/hour, Consult your dealer.
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The kind of the crane and crane classes of the hoisting devices

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※In the case of dual speed, it is assumed that the ratio between low speed and high speed of the load time is 1:2, and the ratio between low speed and high speed of the maximum number of starts per Hr is 2:1.

※Continuous operating time limit at maximum allowable frequency of use is below

Load condition Light(50% of the rated load) Medium(63% of the rated load) Heavy(80% of the rated load)
Continuous operating time Less than 8 hours Less than 4 hours Less than 2 hours

※Please contact us if it exceeds above continuous operating time.