ME Pumps.
15
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Check and record Voltage, amperage per phase, and kilowatts.
Voltage regulation.
While the motor will operate satisfactorily under these voltage and
frequency variations, such operation may not be in accordance with
the standards established for operation in underrated conditions:
•
Variation in the voltage may not exceed ± 10% the rating
specified on the motor data plate.
•
Frequency variation may not exceed ± 5% the rating
specified on the motor data plate.
•
The sum of the voltage and frequency variation may not
exceed ± 10% the motor rating while the frequency variation
does not exceed ± 5%.
Pump shutdown.
The following shutdown procedures will apply in most normal shut-
downs for the WDM pumps types ME. If pump will be inoperative for
an extended length of time, follow storage procedures:
•
Close the discharge gate valve slowly to prevent hydraulic
shock, and then cut power to the motor.
•
Cut power to motor.
Short duration shutdown.
For temporary or overnight shutdowns in conditions above
freezing, pumps may remain filled with liquid. Pumps should be
primed again fully before restarting
Extended period shutdown.
If the shutdown is for a longer period of time, or for pump
maintenance, close the suction gate valve. If a suction gate valve is
not used, but there is a positive suction head, proceed to drain all
liquid from suction line in order to end the liquid flow to the suction
nozzle. All plugs in drains and vent traps should be removed and all
liquid drained from the pump casing.