Xylem IM167 R8 Aquavar CPC (Centrifugal Pump Control) - Manual (Page 80)

80
Single Pump – Submersible Pump Constant Pressure
Load Reactor (Filter)
A Load reactor or load filter is an electrical device that provides protection to the motor
windings from a specific variable speed drive. Motors are more susceptible to voltage
“spikes” and switching frequencies found in IGBT type drives, especially when the motor leads
exceed 50 ft. Therefore, a load reactor is required when all of the following conditions are met
for ANY type of AC induction motor (above ground or submersible type):
1. Motor cable length from the Aquavar to the motor is more than 50 wire feet.
2. Drive uses IGBT type of switching (which is industry standard and is used by the Aquavar).
If all of the conditions are present above, then it is recommended to wire a LOAD REACTOR
between the Aquavar output (U2, V2, W2) and the motor. Keep the load reactor as close to
the output of the Aquavar for best results. NOTE: See suggested layout drawing and always
refer to your specific motor manufacturers recommendation for VFD’s.
Grounding
NOTE: Always follow local codes for wiring and grounding or refer to the National
Electrical Codes.
Submersible installations are susceptible to stray voltage or grounding problems. It is
recommended to ground the transducer shield to the chassis of the Aquavar cabinet and to
check with a meter for any stray voltage from the three phase motor. Each component of the
electrical Aquavar system should have the same grounding point or reference. Always follow
the submersible motor manufacturer’s recommended installation procedures.
NOTES:
✔
Motors used must be three phase, equal to input voltage.
✔ Standard enclosure is rated for NEMA 1 INDOOR USE ONLY. Consult Factory/ Price
pages for outdoor rated enclosures.
✔ Aquavar CPC not for use on RESIDENTIAL WELL PUMP applications. Consult with factory
for appropriate variable speed controller like the BF15.
✔ Input voltage for the Aquavar can be single phase. Use the U1 , W1 and Ground
connections, and derate the drive by 50% from the three phase rating. Example: 230 volt,
three phase 10 HP Aquavar becomes a 5 HP, 230 volt, single phase rated drive.
PROGRAMMING