PS (3-Phase) Series Operation
wc_tx000123gb.fm 19
4.5 Operation
Before Operation
Improper voltage and frequency of the power supply will prevent the
pump from attaining its full potential, and may also lead to current
leakage, electrical shock, or fire.
4.5.1 Once again, check the nameplate of the pump to verify that its voltage
and frequency are correct.
4.5.2 Check the wiring, power supply voltage, the capacity of the ground
leakage circuit breaker, and the insulation resistance of the motor.
Insulation resistance reference value = 20MW min.
Note:
The insulation reference value of 20M
W
min. is based on a new
or repaired pump. For reference values for a pump that has already
been installed, refer to Maintenance and Inspection in this manual.
4.5.3 Adjust the setting of the overload protector (i.e. circuit breaker) to the
pump’s rated current.
Note:
Verify the rated current on the pump’s nameplate.
4.5.4 When using a generator, as much as possible avoid operating the
pump in conjunction with other types of equipment.
Trial Operation
NEVER start the pump while it is suspended, as the pump may jerk
and cause a serious accident involving injury.
NEVER start the pump where people are present, as they may suffer
electrical shock from current leakage.
Be sure to check the pump’s direction of rotation when the pump is
exposed to atmosphere (a). Utilize a hoist to stabilize the pump on a
level surface while performing this check. Operating the pump in
reverse while it is submerged in water will damage the pump, which
may lead to current leakage, electrical shock, or fire.
4.5.5 The impeller will rotate counterclockwise (b), as viewed from the
bottom of the pump. Operate the pump for a short time (1 to 2 seconds)
to check the rotational direction of the impeller.
Before changing the connections for reverse rotation, make sure that
the power supply (i.e. circuit breaker) is properly disconnected and that
the impeller has stopped completely. Failure to observe this may lead
to serious accidents, including electrical shock, short, or injury.
• To reverse the rotation, the following countermeasure must be taken.
CAUTION
WARNING
CAUTION
WARNING
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