Question 1 of 6
Intermediate

Which are the two most common applications in which a Grundfos SQ/SQE submersible pump is used?

Question 2 of 6
Intermediate

How does the integrated dry-running protection work?

Question 3 of 6
Intermediate

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

Question 4 of 6
Intermediate

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

Question 5 of 6
Intermediate

Why is correct sizing of the submersible pump important?

Question 6 of 6
Intermediate

What is the most commonly used starting method for motors in 4” conventional pumps?

Question 6 of 6
Intermediate

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1: Which are the two most common applications in which a Grundfos SQ/SQE submersible pump is used?
Groundwater lowering & Irrigation
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1: Which are the two most common applications in which a Grundfos SQ/SQE submersible pump is used?
Domestic water supply & Groundwater lowering
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1: Which are the two most common applications in which a Grundfos SQ/SQE submersible pump is used?
Domestic water supply & Irrigation
2: How does the integrated dry-running protection work?
It automatically restarts 3 minutes after shut down.
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2: How does the integrated dry-running protection work?
It prevents sand from damaging the pump.
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2: How does the integrated dry-running protection work?
It automatically shuts down the pump if water shortage is detected.
3: By how much does the supply voltage decrease before the motor contactor stops the pump?
More than 10 %
3: By how much does the supply voltage decrease before the motor contactor stops the pump?
More than 15 %
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3: By how much does the supply voltage decrease before the motor contactor stops the pump?
More than 20 %
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4: How many times higher than nominal speed does the motor current reach during the first milliseconds?
Four times higher
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4: How many times higher than nominal speed does the motor current reach during the first milliseconds?
Six times higher
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4: How many times higher than nominal speed does the motor current reach during the first milliseconds?
Seven times higher
5: 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.
5: Why is correct sizing of the submersible pump important?
Because too small a pump will pump the well dry.
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5: 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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6: What is the most commonly used starting method for motors in 4” conventional pumps?
Direct on line
6: What is the most commonly used starting method for motors in 4” conventional pumps?
Star delta starters
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6: What is the most commonly used starting method for motors in 4” conventional pumps?
Auto transformer
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