Sizing conductor rail of cranes 3

[martinrelayer]

Hi all,

new 2 overhead cranes of 500 meters travel on the same busbar rail needs 900A feeding. the plan is to feed from 3 different points due to voltage drop. Voltage is 400V.

we requested single feeding but they state it's technically impossible.

what do you think on this? it is like that?

Thanks in advance

Martin.

 

[waross]

You will have the same voltage drop issues at greater cost, Mike.



Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[FacEngrPE]

MikeHalloran, suggests dual crane feeders. Foundries will sometimes wire cranes with dual crane feeder systems, but onboard the crane you will find a manual transfer switch. so that if one feeder system fails, power can be obtained from the alternate system. It is a kind of old school approach that provides some redundancy, but does not do much in practice for availability. Either you use double the material of a single feeder system, or you accept that if both cranes are on the same feeder it is an abnormal situation, and accept the higher voltage drop. This approach can significantly increase the complexity of maintenance lockout.

Fred

 

[cuky2000]

For consideration, below is a refined shape of the voltage profile for tow feeding points with a single busbar. It is recommended to perform a technical and economical evaluation and choose the best option for your specific application.

Good luck