PART
NUMBER
DESCRIPTION
MODEL
OUTPUT
AMPS
HP
INPUT
PHASE
OUTPUT
PHASE
SHIP
WEIGHT
1051672
VARIOspeed
®
3R Duplex, 240V
VS21-7.0-N3RD
7.0
1.5
1
3
115 lbs.
1051673
VARIOspeed
®
3R Duplex, 240V
VS21-10.0-N3RD
10.0
3
1
3
115 lbs.
1051674
VARIOspeed
®
3R Duplex, 240V
VS23-16.5-N3RD
16.5
5
3
3
115 lbs.
1051675
VARIOspeed
®
3R Duplex, 240V
VS23-31.8-N3RD
31.8
7.5-10
3
3
146 lbs.
1051676
VARIOspeed
®
3R Duplex, 240V
VS23-45.0-N3RD
45.0
15
3
3
154 lbs.
1051677
VARIOspeed
®
3R Duplex, 240V
VS23-58.0-N3RD
58.0
20
3
3
154 lbs.
1051678
VARIOspeed
®
3R Duplex, 480V
VS43-16.0-N3RD
16.0
7.5-10
3
3
150 lbs.
1051679
VARIOspeed
®
3R Duplex, 480V
VS43-29.5-N3RD
29.5
15-20
3
3
161 lbs.
Specification/Selection
Note:
HP rating is based on standard NEMA B 4-pole motor (used for indication only, use nameplate FLA for sizing). The
output voltage of the VFD cannot exceed the incoming voltage. Example: 208V in, 208V out (max).
Selecting the Correct VFD
1. Determine the voltage available on site.
2. Select pumps with the same voltage (motor must be 3 phase).
3. Check pump motor nameplate Full Load Amps (FLA) for proper VFD sizing.
4. Select a VFD with an output amp rating higher than motor FLA.
5. Use motor Service Factor Amps (SFA) for submersible well pump applications for VFD sizing.
Phase Conversion
It is possible to supply single phase 240V input power to VS23 models. The VFD output amp must be derated by 50%.
Example: The VS23-45.0-N3RD will be derated to 22.5A output (max).
*Use three-phase input power if available. VS23 VFD’s are not UL listed with single-phase supply. Always use a 3 phase motor.
Maximum Motor Cable Lengths
For 208V-240V pumps: 400 ft. For cable lengths greater than 400 ft., use a load reactor for each pump. Do not exceed
800 ft.
For 480V pumps: 50 ft. For cable lengths greater than 50 ft., use a load reactor for each pump. Do not exceed 300 ft.
Environmental
Operating temperature: 14ºF to 104ºF (-10ºC to 40ºC)
Storage temperature: -4ºF to 131ºF (-20ºC to 55ºC)
Altitude: Maximum of 3280 ft (1000m) above sea level
VARIO
speed
®
3R Duplex User Manual
3