IEC 60034-12 - starting torque?
IEC 60034-12 - starting torque?
(OP)
We got a quote for some induction motors, taking exception to a starting torque of 2.8 x running torque.
That is not part of our spec, but we do reference IEC 60034.
We have No copies in house!
I see IEC 60034-12 is supposed to include starting characteristics of induction motors less than 660V.
Could I impose on someone to confirm whether starting torque that high is part of 60034-12 ?
thanks
Dan T
That is not part of our spec, but we do reference IEC 60034.
We have No copies in house!
I see IEC 60034-12 is supposed to include starting characteristics of induction motors less than 660V.
Could I impose on someone to confirm whether starting torque that high is part of 60034-12 ?
thanks
Dan T





RE: IEC 60034-12 - starting torque?
Even with a Design H motor you'll only get more than 2.8 p.u. locked rotor torque if the motor is a small one; all the Design N and the larger Design H motors are lower than 2.8 p.u.
There isn't an upper limit on torque to be developed listed in the standard as far as I can see.
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RE: IEC 60034-12 - starting torque?