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3.5 Fluctuations in the power voltage and frequency
Standard: Rotation electricity machine general rules
JIS C 4034-1:1999，JEC-2137-2000
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. 5 Change region of the voltage and frequency
