• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 42 subscribers
  • Views 3474 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TIDA-00195: motor nameplate ampere is the ampere that motor draw from all 3 phase or it is just for one phase?

Dave Hunson
Expert 1730 points
Part Number: TIDA-00195


Hi everyone

I saw nameplate of motor some questions comes to my mind

let's assume my motor nameplate is this ,so the motor AMPS is 28.4A(in 460v) .

question1: so 28.4A is ampere that motor draw from all 3 phase or it is just for one phase of motor.


question2:if I put a current meter in just one phase how much current I expect to see in full load.

thanks for attention .

Dave.

  • 0
    TI__Expert 3550 points

    Hello Dave,

    I am following up the old thread. I apologize for late feedback. 

    Typically the current written on a AC induction motor's name plate is the current per phase.

    You will see that phase nominal current when the AC induction motor runs at the nominal load conditions specified on the name plate.
    This is a 2 pole pair ACIM motor so the synchronous mechanical speed at zero slip is 60Hz*60/2 = 1800rpm. Under these conditions,
    AC input: 3-phase 460VAC/60Hz, mechanical speed: 1750rpm, the phase current should be nominal too.
    For nominal load the slip in that case will be (1800rpm-1750rpm)/1800rpm =  0.0277. 

    You may like to to conform with SIEMENS, who are the vendor of that motor. 

    Regards,
    Martin Staebler