GRUNDFOS DATA BOOKLET

SQFlex

Renewable-energy based water-supply systems50/60 Hz

2

Contents

Product dataPerformance range 3Applications 4SQFlex system 4Type keys 5Pumped liquids 5Curve conditions 6System overview 7

Features and benefitsDry-running protection 9High efficiency 9Overvoltage and undervoltage protection 9Overload protection 9Overtemperature protection 9Maximum Power Point Tracking (MPPT) 10Wide voltage range 10Reliability 10Installation 10Service 10

Application examplesSQFlex Solar 11SQFlex Wind 16SQFlex Combi 18SQFlex system 20

System componentsSQF submersible pump 21CU 200 SQFlex control unit 21IO 100 SQFlex switch box 23IO 101 SQFlex switch box 23IO 102 SQFlex breaker box 24Charge controller 24Wind turbine 24Generator 24

System sizingSizing of SQFlex system 25

Performance curvesSQF 0.6-2 26SQF 0.6-3 26SQF 1.2-2 27SQF 1.2-3 27SQF 2.5-2 28SQF 3A-10 28SQF 5A-3 29SQF 5A-7 29SQF 8A-3 30SQF 8A-5 30SQF 11A-3 31

Technical dataDimensions and weights 32Electrical data 32CU 200 SQFlex control unit 33IO 100 SQFlex switch box 33IO 101 SQFlex switch box 34IO 102 SQFlex breaker box 34Charge controller 34Material specification, helical rotor pump 35Material specification, centrifugal pump 36Material specification, motor 37

Product numbersSQF submersible pump 38CU 200 SQFlex control unit 38IO 100 SQFlex switch box 38IO 101 SQFlex switch box 38IO 102 SQFlex breaker box 38Charge controller 38Wind turbine 38Submersible drop cables 38

AccessoriesWhisper 200 wind turbine 39Tower kit for Whisper 200 39Tower installation kit 39Tower pipe selection 40Auger/anchor 41Grease 41Level switch 41Anemometer 41Submersible drop cable 42Cable termination kit, type KM 42Cable clips 42Straining wire 42Wire clamp 42Zinc anodes 42

Further product documentationWebCAPS 44WinCAPS 45

SQFlexProduct data

Performance range

Note: The curves must not be used as guarantee curves.

TM02

233

7 23

09TM

02 2

411

2309

0 10 20 30 40 50 60 70 Q [m/day]

0

20

40

60

80

100

120

140

160

180

200

220

H[m] SQFlex Solar

A B C D E

E 1700 Wp

D 800 Wp

C 400 Wp

B 200 Wp

A 100 Wp

0 10 20 30 40 50 60 70 Q [m/day]

0

20

40

60

80

100

120

140

160

180

200

H[m] SQFlex Wind

A B C D

D 8 m/s

C 7 m/s

B 6 m/s

A 5 m/s

3

4

Product data SQFlex

ApplicationsBeing designed for continuous as well as intermittent operation, the SQFlex system is especially suitable for water supply applications in remote locations, such as

villages, schools, hospitals, single-family houses, etc.

farms watering of cattle irrigation of fields and greenhouses

game parks and game farms watering applications

conservation areas surface water pumping

floating pump installations for pumping of water from ponds and lakes.

SQFlex systemThe SQFlex system is a reliable water supply system based on renewable energy sources, such as solar and wind energy. The SQFlex system incorporates an SQF submersible pump.

Very flexible as to its energy supply and performance, the SQFlex system can be combined and adapted to any need according to the conditions on the installation site.

The system components are

SQF submersible pump CU 200 SQFlex control unit IO 100 SQFlex switch box IO 101 SQFlex switch box IO 102 SQFlex breaker box charge controller energy supply:

solar panels wind turbine generator batteries.

PumpThe SQF pump range comprises two pump technologies:

the helical rotor pump (3") for high heads and small flows.

the centrifugal pump (4") for low heads and large flows.

The performance curves below illustrate the pump performance for the two pump models.

Fig. 1 Performance ranges for helical rotor and centrifugal pumps

All pump types are available in two material variants:

SQF is the standard version made of stainless steel DIN W.-Nr. 1.4301

SQF-N is made of stainless steel DIN W.-Nr. 1.4401.

TM02

242

5 39

01

Q

H

A

B

A: Helical rotor pumpB: Centrifugal pump

/day

Product data SQFlex

MotorThe motor has been developed specifically for the SQFlex system and is designed according to the permanent-magnet principle with built-in electronic unit.

The SQFlex 3" motor range comprises only one motor size, i.e.

MSF 3 with a maximum power input (P1) of 1400 W.

The motor speed range is 500-3600 min-1, depending on power input and load.

The motor is available in two material variants:

MSF 3 is the standard version made of stainless steel DIN W.-Nr. 1.4301.

MSF 3 N is made of stainless steel DIN W.-Nr. 1.4401.

The motor has three internal limitations:

maximum power input (P1) of 1400 W maximum current of 8.4 A maximum speed of 3600 min-1.The pump delivers its maximum performance when one of the above limitations is reached.

Supply voltageFlexible as regards power supply and power range, the motor can be supplied with either DC or AC voltage:

30-300 VDC, PE 1 x 90-240 V 10 %/+ 6 %, 50/60 Hz, PE.

CU 200 SQFlex control unitThe CU 200 is a combined status and control unit for the SQFlex pump system. Moreover, the CU 200 enables connection of a level switch placed in a water reservoir or tank.

IO 100 SQFlex switch boxThe IO 100 is an on/off switch box designed for switching the system power supply on and off.

IO 101 SQFlex switch boxThe IO 101 is an on/off switch box designed for switching the system power supply on and off.

The IO 101 is used in solar-powered SQFlex systems with a back-up generator.

IO 102 SQFlex breaker boxThe IO 102 is an on/off breaker box designed for switching the system power supply on and off.

The IO 102 is used in wind-powered SQFlex systems or wind- and solar-powered SQFlex systems.

The IO 102 makes it possible to slow down or stop the wind turbine.

Charge controllerThe charge controller is used when a battery back-up system is installed with an SQFlex pumping system.

Solar modulesGrundfos solar modules have been developed specifically for the SQFlex system. The solar modules are equipped with plugs and sockets enabling easy connection in parallel.

The number of solar modules required depends on

quantity of water required head required installation location.For further information on solar modules, please contact your local Grundfos company.

GeneratorIn case the power supply from its primary source of energy is temporarily insufficient, the SQFlex system can be powered by a diesel- or petrol-driven generator.

BatteriesThe SQFlex system can be powered by batteries with a voltage supply of 30-300 VDC, maximum current 8.4 A.

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6

Product data SQFlex

Type keys

Type key for helical rotor pumps

Type key for centrifugal pumps

Pumped liquidsSQF pumps are applicable in thin, clean, non-aggressive, non-explosive liquids, not containing solid or long-fibred particles larger than sand grains.

pH value: 5 to 9.

Liquid temperature: 0 C to +40 C.

The pump can run at free convection (~ 0 m/s) at maximum +40 C.

Sand contentMaximum sand content: 50 g/m3.

A higher sand content will reduce the pump life considerably due to wear.

Salt contentThe table below shows the resistance of stainless steel to Cl-. The values in the table are based on a pumped liquid with a pH value of 5 to 9.

For additional protection, e.g. if the Cl- content exceeds 500 ppm, zinc anodes can be used. See Zinc anodes on page 43.

Curve conditionsPerformance range, SQFlex SolarThe SQFlex Solar performance range shown on page 3 is based on

solar radiation on a tilted surface (tilt angle of 20 ) HT = 6 kWh/m2 per day ambient temperature: +30 C 20 northern latitude.

Performance range, SQFlex WindThe SQFlex Wind performance range shown on page 3 is based on

average wind speed, measured over one month calculations according to Weibull's factor k = 2 continuous operation over 24 hours.

Specific performance chartsThe specific performance charts on pages 26 to 31 are based on the following guidelines:

All curves show mean values. The curves must not be used as guarantee curves. Typical deviation: 15 %. The measurements have been made at a water

temperature of +20 C. The curves apply to a kinematic viscosity of

1 mm2/s (1 cSt). If the pump is used for liquids with a viscosity higher than that of water, this will reduce the head and increase the power consumption.

Pressure lossThe QH curves are inclusive of inlet and valve losses at actual speed.

Example SQF 1.2 -2 x

Type range

Rated flow [m3/h] at 3000 min-1

Number of stages

Blank = Stainless steel DIN W.-Nr. 1.4301N = Stainless steel DIN W.-Nr. 1.4401

Example SQF 5A -3 x

Type range

Rated flow [m3/h] and pump generation

Number of stages

Blank = Stainless steel DIN W.-Nr. 1.4301N = Stainless steel DIN W.-Nr. 1.4401

Stainless steelDIN W.-Nr.

Cl- content[ppm]

Liquid temperature [C]

1.43010-300 < 40

300-500 < 301.4401 0-500 < 40

Product data SQFlex

System overviewThe SQFlex system can be used in a number of combinations as shown in the table below.

System consists of the following components

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Win

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