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3.5 Fluctuations in the power voltage and frequency
Standard: General rules for rotating electrical machines
IEC 60034-1:2004
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. 3-1 Change region of the voltage and frequency
