two motor star delta

[hicham hicham]

hi guys i have an issue with one of two motor running star delta for a concrete mixer one motor is pulling out more current than the other one almost 10A difference (1st=39 , 2nd=48) knowing that the 2nd is rewinding both motor are same company

 

[westward10]

Was the loading pretty much equal prior to one of them having a rewind.

 

[Pete999]

Method of starting I presume.

Common in all of the concrete plants I worked at for their mixers. Until we started upgrading to VSD control.

Agree, bot the OPs fault his English is a bit confusing wonder what I sould be like speaking his spoken word, did a good job I thought, just got myself all tied up, must be an age thing on my part.

 

[Bobster]

My guess, if the winding's test out ok and are balanced. (Test from the starter cabinet first, you'll find cable faults too that way). Then it will be mechanical failure, likely a bearing on the mixer itself or in the motor.

Quick check, disconnect the motor and run it without a load, check the current is equal an within a sensible range on each phase.