Pool Main Pump Motor: Difference between revisions
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The existing motor is fed by 3 x TBD (#10 AWG GND). Fused with 3 x FRN-R-60 (60 A) fuses. | The existing motor is fed by 3 x TBD (#10 AWG GND). Fused with 3 x FRN-R-60 (60 A) fuses. | ||
== Variable Frequency Drive (VFD) == | == Variable Frequency Drive (VFD) == | ||
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* Use Variable Torque (VT) mode for pump control (power is proportional to the cube of the speed) | * Use Variable Torque (VT) mode for pump control (power is proportional to the cube of the speed) | ||
== Past Considerations == | |||
=== Power Factor Correction Capacitor (PFCC) === | |||
At present (as of August 2021), no power factor correction capacitor (PFCC) is in use. It was decided that given cost priorities, a PFCC would not offer sufficient payback to justify its purchase. | |||
Myron Zucker was contacted in August 2020 and provided two options, both rated for 240 VAC, 5 kVAr, 3-phase, 60 Hz: | |||
* KNM23005-3 (NEMA 12 for indoor use, 14" H x 9.25" W x 5.25" D) | |||
* KNM23005-3N3 (NEMA 3R suitable for outdoor use, 16" H x 12" W x 6" D) | |||
Applying a 5 kVAr PFCC would reduce the FLA from 37 A to 31 A. This would reduce i-squared-R losses by 6 A. Actual losses are then based upon the cable run. | |||