-11-
3.5
Fluctuations in the power supply voltage and frequency
Standard: Rotating electric machine general rules, JIS C 4034-1:1999,
JEC-2137-2000.
There is no problem to main parts when operated continuously under the voltage
and frequency fluctuations in area A, and no problem to main parts when operated
under the voltage and frequency fluctuations in area B. (Refer to Fig. 8.)
Here, “no problem” means that the pump can be operated safely and without the life
of the parts being shortened, and does not refer to the pump characteristics or the
rated conditions such as a rise in temperature. The ratings are the rated torque
(N.m).
Fig. 8 Fluctuations in the power supply voltage and frequency
Commence wiring work only after removing the power plug. Do not carry out wiring
work while the wiring is live under any circumstances. Working under such conditions
may result in electric shock.
Ensure that the earth is installed correctly. Incorrect earthing may result in electric
shock in the event of a malfunction or earth leakage.
A dedicated earth leakage breaker should also be installed.
Fit overload protection equipment which is appropriate for the motor capacity. Fire
may result if overload protection is not fitted, or is not appropriate for the motor
capacity.
Warning
Caution
Voltage
Area A
Area B
Frequency
Rated point
