4
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. 3.2 Change region of the voltage and frequency
3.6 Checking Operation After Installation
1) Remove the rubber cap and vent plug on the inlet pipe.
2) Switch power ON, check the direction of rotation, and check for suction.
3) When checks are complete, switch off the main power supply and stop the pump. Check that
the pump has stopped.
Caution: Use cable, with each core wire having a cross-section area of 1.0 mm
2
or more.
