Question 1 of 6
Intermediate

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

Question 2 of 6
Intermediate

Which protection features does the SQE have?

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

How long did it take to replace the pump 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

Where is domestic groundwater extraction typically relevant?

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: Which protection features does the SQE have?
Voltage handling, soft start, dry-running protection and overload protection.
2: Which protection features does the SQE have?
Protection against the well running dry.
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2: Which protection features does the SQE have?
The SQE does not have any protection features.
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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: How long did it take to replace the pump with a Grundfos SQ?
30 minutes
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4: How long did it take to replace the pump with a Grundfos SQ?
60 minutes
4: How long did it take to replace the pump with a Grundfos SQ?
90 minutes
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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: Where is domestic groundwater extraction typically relevant?
In big cities.
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6: 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.
6: Where is domestic groundwater extraction typically relevant?
In smaller and medium sized towns.
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