Question 1 of 6
Intermediate

Is the SQE pump able to provide constant pressure?

Question 2 of 6
Intermediate

How long did it take to replace the pump with a Grundfos SQ?

Question 3 of 6
Intermediate

Why is correct sizing of the submersible pump important?

Question 4 of 6
Intermediate

Where is domestic groundwater extraction typically relevant?

Question 5 of 6
Intermediate

Why must the pump unit be installed below the dynamic water table?

Question 6 of 6
Intermediate

How many times higher than nominal speed does the motor current reach during the first milliseconds?

Question 6 of 6
Intermediate

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1: Is the SQE pump able to provide constant pressure?
No.
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1: Is the SQE pump able to provide constant pressure?
Yes.
2: How long did it take to replace the pump with a Grundfos SQ?
30 minutes
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2: How long did it take to replace the pump with a Grundfos SQ?
60 minutes
2: How long did it take to replace the pump with a Grundfos SQ?
90 minutes
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3: 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.
3: Why is correct sizing of the submersible pump important?
Because too small a pump will pump the well dry.
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3: 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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4: Where is domestic groundwater extraction typically relevant?
In big cities.
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4: 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.
4: Where is domestic groundwater extraction typically relevant?
In smaller and medium sized towns.
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5: Why must the pump unit be installed below the dynamic water table?
So you are sure to minimise your power bill.
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5: Why must the pump unit be installed below the dynamic water table?
To avoid the risk of dry-running during operation.
5: Why must the pump unit be installed below the dynamic water table?
To maintain a stable pressure in the system.
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6: How many times higher than nominal speed does the motor current reach during the first milliseconds?
Four times higher
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6: How many times higher than nominal speed does the motor current reach during the first milliseconds?
Six times higher
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6: How many times higher than nominal speed does the motor current reach during the first milliseconds?
Seven times higher