－15－
4.5 Fluctuations in the power voltage and frequency
Standard: Rotation electricity machine general rulesIEC60034-1:2004
To the voltage change and frequency change in Domain A, in main rated
values, it operates continuously, and can be used practically convenient, and
to the voltage change and frequency change in Domain B, it shall operate with
main rated values and shall be used practically convenient.
However, operation with "it is convenient and safe is maintained on "practical
use, it means not resulting in the grade which shortens a life remarkably, and
the characteristic, a temperature rise, etc. do not apply correspondingly in the
state of rating. Moreover, main rating shows rated torque (N
･
m).
Fig.10 Change region of the voltage and frequency
