Pool Main Pump Motor: Difference between revisions

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Pool Main Pump Motor (view source)

Revision as of 23:28, 29 September 2021

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→‎Variable Frequency Drive (VFD)
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== Variable Frequency Drive (VFD) ==
== Variable Frequency Drive (VFD) ==


IMPORTANT: At this time, this section is for investigation purposes only.  It has not been determined when/if a VFD will be implemented.
<b>IMPORTANT:</b> At this time, this section is for investigation purposes only.  It has not been determined when/if a VFD will be implemented.
 
An Automatic Direct DURApulse GS23-2015 VFD has been chosen over multiple competing options.  The feature set and pricing is very competitive.


=== Requirements ===
=== Requirements ===


* It's likely that the drive could be exposed to greater than 40 &deg;C (104 &deg;F) operation.  A very hot summer day, plus additional heat contained within the building and/or enclosure could easily place the ambient operating range into the 40 &deg;C to 50 &deg;C (122 &deg;F) range.  This temperature is also referred to as the Maximum Enclosure Internal Temperature (MEIT) in some literature.
* Must withstand an ambient operating range in the 40 &deg;C to 50 &deg;C (122 &deg;F) range.  For the GS23-2015 at 75% load, 50 &deg;C, no de-rating is necessary up to a 4 kHz carrier frequency (SVPWM mode).
* The club power source is 230 VAC high-leg delta.  
* Must be compatible with 240 VAC high-leg delta.


=== Safety ===
=== Safety ===


A safety relay (reset and E-stop circuits) and additional contactor (maybe two contactors w/o STO) are likely required.
A safety relay (reset and E-stop circuits) and additional contactor (maybe two contactors w/o STO) are likely required.
=== Options ===
The following options are under consideration (still a work in progress).  All drives are sized to drive a 15 HP motor, 230 VAC three-phase.
Unless otherwise noted, all support Modbus RTU (via RS-485).
==== Fuji Electric FRN0047C2S-2U ====
* 47.0 FLA (21 % margin for 37 FLA)
* 10.24" H x 8.66" W x 7.48" D
* No STO
==== Hitachi WJ200-110LF ====
* 56.0 FLA VT (34 % margin for 37 FLA)
* 11.65" H x 7.09" W x 6.89" D
* With STO
* DC Reactor: DCL-L-11
* Input Side AC Reactor: ALI-22L2
* Input Side Noise Filter: NF-L60
* Radio Noise Filter: ZCL-A (Zero-Phase Reactor) or CFI-L (Capacitor Filter)
==== DURApulse GS20 Series GS23-2015 ====
* 51 FLA VT (27 % margin for 37 FLA)
* Frame Size "E": 9.84" H x 5.12" W x 7.28" D
* With STO (TUV Certified)
* Conduit Box: GS20A-N1E ($29)
* EMC Filter & Zero-Phase Reactor: RF008X00A
* Input Fuse: 110 A, TJN110 (Fast-Acting Class T) or JHL110 (Edison Class J)
* Line/Load Reactor: LR-2020 ($181.00)
* AC Output Filter (VTF): VTF-246-NRS
=== Wiring ===
Shielded VFD cabling may be required to contain high-frequency emissions.  Automation Direct has #8 AWG 4-conductor XLPE insulated shielded cable, rated for 50 A at 75 &deg;C (NEC 310.15 (B), assumes 30 &deg;C ambient) for $8.08/ft (August 2021 pricing).  The cable is made in USA by Southwire.  This cable has an OD of 0.87 inches and minimum bend radius of 10 inches.  Calculations suggest a 1-1/4" conduit may be necessary to pull a cable of this diameter with adequate fill margin.  The existing PVC conduit appears to be about 3/4" (to confirm), which would need to be replaced.


A load reactor likely will not be used, nor does it necessarily eliminate the need for shielded VFD cabling.
A load reactor likely will not be used, nor does it necessarily eliminate the need for shielded VFD cabling.
=== Configuration ===
Subject to further review:
* Variable Torque (VT) for pump control (power is proportional to the cube of the speed)
==== DURApulse GS23-2015 ====
* For 75% load at 50 &deg;C, no de-rating is necessary up to 4 kHz (SVPWM mode).


=== Bill of Materials ===
=== Bill of Materials ===
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<b>Not Included:</b> DIN rail, terminals, small fuse terminal(s), control wire, etc.
<b>Not Included:</b> DIN rail, terminals, small fuse terminal(s), control wire, etc.
=== Motor Cable ===
Shielded VFD cabling may be required to contain high-frequency emissions.  Automation Direct has #8 AWG 4-conductor XLPE insulated shielded cable, rated for 50 A at 75 &deg;C (NEC 310.15 (B), assumes 30 &deg;C ambient) for $8.08/ft (August 2021 pricing).  The cable is made in USA by Southwire.  This cable has an OD of 0.87 inches and minimum bend radius of 10 inches.  Calculations suggest a 1-1/4" conduit may be necessary to pull a cable of this diameter with adequate fill margin.  The existing PVC conduit appears to be about 3/4" (to confirm), which would need to be replaced.
=== Configuration ===
* Use Variable Torque (VT) mode for pump control (power is proportional to the cube of the speed)
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