34
SQFlex
Product numbers
Complete unit with 6 ft cable Submersible drop cables
The submersible drop cables for SQF pumps are
approved for use in drinking water (KTW approved).
The material of the submersible drop cable is EPR.
The table below shows the maximum length of the
submersible drop cable for the different sizes of cable,
allowing for a 2% power loss.
The table values are calculated on the basis of the
formula:
where
L = Length of cable [ft]
∆P = Power loss [%]
V
mp
= Maximum power voltage [V]
Wp = Watt peak [Wp]
ρ = Specific resistance: 8.175 x 10
-6
[Ω in
2
/ft]
q= Cross-section of submersible drop cable [in
2
]
The sizing tool in WinCAPS makes it possible to calcu-
late the exact losses.
TM02 2217 3901
Pump type Pump size
Product no.
SQF
3 SQF-2 3" 96078027
6 SQF-2 3" 96078028
11 SQF-2 3" 96078029
25 SQF-3 4" 96078042
25 SQF-6 4" 96078043
40 SQF-3 4" 96078044
75 SQF-3 4" 96078139
No. of
50 Wp solar
modules
Power
[Wp]
Max. cable length [ft]
14 AWG 12 AWG 10 AWG 8 AWG
3 150 515 815 1300 2070
4 200 385 610 975 1550
6 300 255 405 650 1035
8 400 190 305 485 775
10 500 155 245 390 620
12 600 125 200 325 515
14 700 110 175 275 440
16 800 95 150 240 385
18 900 85 135 215 345
20 1000 75 120 195 310
The values in the table are based on Grundfos 50 W
solar modules (140 VDC output).
L
∆PqV
mp
×
2
×
Wp 100 2 ρ×××
--------------------------------------------
ft[]=
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