Xylem IM226R02 CP-Series Submersible Motors - Manual (Page 13)

CP-Series Submersible Motors Installation, Operation and Maintenance Manual 11
Guidelines for VFD Control (continued)
Use of VFD with CentriPro CP Series Submersible Standard Motor
Standard CentriPro CP Series motors can be used if it can be guaranteed that the VFD will not generate higher
voltage peaks than 690V and if voltage rise time dV/dt is lower than 500V/μs. If the VFD can not fulfil this
recommendation filters between the VFD and the motor has to be used. The requirement will then be that the
VFD together with the filters does not generate higher peaks than 690V and that the voltage rise time dV/dt
should be lower than 500V/μs. However it is always recommended the use of sine wave filters.
Water Temperature and VFD Use
Together with VFD we recommend the usage of the High Temperature (HT version) of the motor up to 30°C
of water temperature. For higher water temperatures a derating of the motor should be made.
Derating of the motor depends on the quality of the output from the VFD. If the quality is close to the quality
of the supply without VFD then there is no special restriction regarding water temperature for VFD use. Refer
to the technical catalogue for submersible motors for water temperature limits.
End Notes
If the installation requires operation other than stated in the guidelines or if questions arise that are not covered
in the guidelines please contact Xylem Inc. customer service for guidance. The toll free number for customer
support is 1-877-833-2872.
Please note that Xylem Inc. reserves the right to disclaim the warranty in case of: a) the product is out of stan-
dard warranty period; b) the defect is a consequence of use or installation in a manner contrary to the Supplier’s
instructions; c) technical analysis show that the above VFD guidelines or general motor guidelines have not been
followed.