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Check also that the pump runs within its operating limits, hydraulics and electrics. If
necessary partially close gate valve.
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After starting, measure the following values:
working voltage of the submersible electropump on each phase
Check absorption on each phase.
Any unbalance must not exceed 5%. If values are
higher, which could be caused by the submersible electropump and/or supply line,
check absorption under the other two electropump-mains connection conditions being
careful not to reverse rotation direction. The optimum connection is when the difference
in absorption between the phases is less. Note that if you find that highest absorption is
always on the same line phase then the main cause for the unbalance is the mains
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Turn off immediately if:
•
The nominal tension which is quoted on the label of the motor is got over or higher and
lower tension shiftings that the nominal tension are measured (see specifications sect.
4.1).
•
The current absorbed is greater than that given on the rating plate.
•
There is the risk of dry working.
8 Routine and corrective maintenance
The motor requires no maintenance: no routine or corrective maintenance is required.
If the submersible electropump must remain immersed during long periods of inactivity, it should
be started up every 20 – 30 days in order to prevent the rotor from jamming
9 Assistance
Only specialized workshops are allowed to do repair work (use original F.B. parts only).
If you have any queries or problems please contact your dealer or F.B. directly.
