Question on motor starting requirement.

[yjbgamjoa]

Hi, I have one question on motor starting requriements. My client specification states 3 consecutive starts @ 80% voltate with load inertia according to IEC 60034-12. However our voltage variation is only 400V +-10%. I believe the voltage will not drip as much as to 80%.
Does this requirement means a normal operation of motor and pump with 80% voltage or means just a start?
Actually LRT of my motor can cover the required starting torque of pump with 80% voltage. However FLT is a problem. I cannot cover the required torque of pump at the rated operating condition.
In this case shall I change motors to higher rating?

Please advise me. Thanks.

[fx007]

Dear whateveryournamightbe,

Read this:

[link Point to another website Only the registered members can access] page 52, etc... there is a calculation, just apply the #.

Take care

[fx007]

Dear whateveryournamightbe,

Read this:

[link Point to another website Only the registered members can access] page 52, etc... there is a calculation, just apply the #.

Take care

[eliahud]

the voltage drop is during the starting period, caused by the motor starting current that equal about seven time the nominal current of the motor.

[sidou-82]

could be useful :

[link Point to another website Only the registered members can access]

[sidou-82]

could be useful :

[link Point to another website Only the registered members can access]