Question 1 of 6
Intermediate

Why is correct sizing of the submersible pump important?

Question 2 of 6
Intermediate

Which submersible pump was replaced with a Grundfos SQ?

Question 3 of 6
Intermediate

Where is domestic groundwater extraction typically relevant?

Question 4 of 6
Intermediate

How does the integrated dry-running protection work?

Question 5 of 6
Intermediate

By how much does the supply voltage decrease before the motor contactor stops the pump?

Question 6 of 6
Intermediate

What must the supply voltage lie between in order for the SQ/SQE pump to deliver a flow of water?

Question 6 of 6
Intermediate

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1: Why is correct sizing of the submersible pump important?
Because an undersized pump will not be able to deliver the required flow and pressure and an oversized pump reduces energy efficiency, which increases operational costs.
1: Why is correct sizing of the submersible pump important?
Because too small a pump will pump the well dry.
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1: Why is correct sizing of the submersible pump important?
Because too big a pump will ruin the taps due to too high pressure.
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2: Which submersible pump was replaced with a Grundfos SQ?
A 4” submersible pump 
2: Which submersible pump was replaced with a Grundfos SQ?
A 3” submersible pump
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2: Which submersible pump was replaced with a Grundfos SQ?
A 5” submersible pump 
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3: Where is domestic groundwater extraction typically relevant?
In big cities.
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3: Where is domestic groundwater extraction typically relevant?
In remote areas where it is too costly to extend the municipal water supply to just a few houses.
3: Where is domestic groundwater extraction typically relevant?
In smaller and medium sized towns.
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4: How does the integrated dry-running protection work?
It automatically restarts 3 minutes after shut down.
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4: How does the integrated dry-running protection work?
It prevents sand from damaging the pump.
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4: How does the integrated dry-running protection work?
It automatically shuts down the pump if water shortage is detected.
5: By how much does the supply voltage decrease before the motor contactor stops the pump?
More than 10 %
5: By how much does the supply voltage decrease before the motor contactor stops the pump?
More than 15 %
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5: By how much does the supply voltage decrease before the motor contactor stops the pump?
More than 20 %
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6: What must the supply voltage lie between in order for the SQ/SQE pump to deliver a flow of water?
Between 100 V and 250 V
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6: What must the supply voltage lie between in order for the SQ/SQE pump to deliver a flow of water?
Between 150 V and 315 V
6: What must the supply voltage lie between in order for the SQ/SQE pump to deliver a flow of water?
Between 230 V and 400 V
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