Is it IEC (CE) requirement to provide assisted start to 3 ph induction motor above certain size?
Is it IEC (CE) requirement to provide assisted start to 3 ph induction motor above certain size?
(OP)
Hello guy:
Does anyone know answer to question in subject line? If it is indeed requirement, can relevant documents to be sited? Motor in question is regular 3 phase squirrel cage induction motor. If this is just good practice in IEC world, then when (motor size) it needs to be used?
Best regards,
PaulBr
Does anyone know answer to question in subject line? If it is indeed requirement, can relevant documents to be sited? Motor in question is regular 3 phase squirrel cage induction motor. If this is just good practice in IEC world, then when (motor size) it needs to be used?
Best regards,
PaulBr





RE: Is it IEC (CE) requirement to provide assisted start to 3 ph induction motor above certain size?
There's nothing I'm aware of in the standards which mandates use of assisted starts for large motors, and any decision to do so which would come from sound engineering practice.
RE: Is it IEC (CE) requirement to provide assisted start to 3 ph induction motor above certain size?
"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington
RE: Is it IEC (CE) requirement to provide assisted start to 3 ph induction motor above certain size?
We have searched internet and could not find any hints that such regulations exists. Only one paper was saying that if motor is class IE2 efficiency it needs to be using with VSD. Nothing was saying about "assisted start"
PaulBr.
RE: Is it IEC (CE) requirement to provide assisted start to 3 ph induction motor above certain size?
RE: Is it IEC (CE) requirement to provide assisted start to 3 ph induction motor above certain size?
Many utilities limit the size of motors started DOL to minimize system voltage dips for other customers.
Bill
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