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Precautions for the selection of sleeve type safet

2022-10-21

Detail

Precautions for the selection of sleeve type safety sliding contact wire of crane (4)

3. Current estimation method

(1) estimation of working current if: select conduit according to the rated working current of load. When the working temperature is 40 ° C, general cranes

if= such as microcatheter, angiography catheter, guide tube, etc. if it is easy to process a+ifb+if the whole machine is stable and reliable c

ifa- conversion of maximum power motor or load duration

jc=100% working current

ifb, ifc- the rest may act two motors at the same time, and the working current is converted when ic=100%. For large capacity and multi motor cranes, the external protection formula of the following empirical testing machine is used

If=Kalc+Kb Σ|+ A

where: IC - total current of other motors of crane (when jc=25%)

Σ I-the total current of other motors of the crane (when jc=25%)

a-the working current of other loads is generally taken as 10 (a)