Question 1 of 6
Intermediate

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

Question 2 of 6
Intermediate

Where is domestic groundwater extraction typically relevant?

Question 3 of 6
Intermediate

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

Question 4 of 6
Intermediate

Which submersible pump was replaced with a Grundfos SQ?

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 is a key installer benefit of the voltage protection in SQ/SQE?

Question 6 of 6
Intermediate

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1: 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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1: Why must the pump unit be installed below the dynamic water table?
To avoid the risk of dry-running during operation.
1: Why must the pump unit be installed below the dynamic water table?
To maintain a stable pressure in the system.
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2: Where is domestic groundwater extraction typically relevant?
In big cities.
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2: 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.
2: Where is domestic groundwater extraction typically relevant?
In smaller and medium sized towns.
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3: How many times higher than nominal speed does the motor current reach during the first milliseconds?
Four times higher
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3: How many times higher than nominal speed does the motor current reach during the first milliseconds?
Six times higher
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3: How many times higher than nominal speed does the motor current reach during the first milliseconds?
Seven times higher
4: Which submersible pump was replaced with a Grundfos SQ?
A 4” submersible pump 
4: Which submersible pump was replaced with a Grundfos SQ?
A 3” submersible pump
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4: Which submersible pump was replaced with a Grundfos SQ?
A 5” submersible pump 
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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 is a key installer benefit of the voltage protection in SQ/SQE?
Steady water supply
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6: What is a key installer benefit of the voltage protection in SQ/SQE?
Faster installation
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6: What is a key installer benefit of the voltage protection in SQ/SQE?
Fewer service visits